H. B. WILLMAN Illinois State Geological Survey, Urbana, Illinois 61801

J. Marvin Weller, Professor of Invertebrate Paleon­tology Emeritus of the University of Chicago, died July 21, 1976, in Greenbrae, California, at the age of seventy-six. His death ended an outstanding father- and-son career. Marvin’s father, Stuart Weller, was a prominent paleontologist in the Department of Ge­ology at the University of Chicago during the first quarter of the twentieth century, when the department was considered by many to be pre-eminent in this country. They were perhaps unique in the close parallel­ism of their careers. Both were outstanding field geolo­gists with a major interest in the Mississippian paleon­tology and stratigraphy of the Midwest. Both served on the Illinois Geological Survey, where in 1907 StuartWeller produced the first geologic map of Illinois for

the recently established Survey, and Marvin was principal author of the third edition in 1945. Both occupied the chair in invertebrate paleontology at the University of Chicago, where they also served as associate editors of the Journal o f Geology.

Marvin was devoted to his father and inspired by his accomplishments. He ac­companied his father in field work from the time he was ten years old until he was sixteen, at which age he became the youngest geological employee of the Illinois Geo­logical Survey. By 1927, when Stuart Weller died suddenly of a heart attack while engaged in field in Kentucky, Marvin was the head of paleontology and stratigraphy at the Survey and was already launched in major studies of Pennsylvanian stratigraphy. Later Marvin completed and published much of Stuart Weller’s extensive geologic map­ping in western Kentucky and southern Illinois.

Both Wellers corresponded with geologists all over the world. Much of their cor­respondence is preserved in the archives of the Illinois Geological Survey. It shows their wide interests during a period of rapid development of geological science—nearly sixty-five years.

Marvin Weller will be particularly remembered for his contributions to Mississippian and Pennsylvanian stratigraphy and paleontology. He was a contributor to the geo­logical profession in many ways—as chairman of national committees, as long-time editor of two national geological journals, as leader and organizer of many field con­ferences and symposiums, and as a dedicated teacher.

Marvin was an unusually versatile stratigrapher with the talent, desire, and energy to make important contributions in paleontology, paleoecology, evolution, sedimenta­tion, and stratigraphic principles and practice. He wrote economic reports on the ge­ology of coal, oil and gas, fluorspar, rock asphalt, and lead resources. Marvin made the transition from those early geologists, whose broad interests were based on years of field experience, to the modern specialists, many of whom have limited field experi­ence but are proficient in laboratory technology and mathematical analysis.

Memorial to James Marvin Weller1899-1976

2 THE GEOLOGICAL SOCIETY O F AMERICA

He was particularly skilled as a reconnaissance geologist, as shown by the success of his foreign explorations. A necessary complement was the ability to generalize, frequently described as “ painting with a broad brush,” at which he was a master.

Marvin was very direct and totally lacking in anything ostentatious. He never “ beat around the bush.” He was forceful and candid when defending his ideas. His short, concise answers seemed abrupt, or even brusque, but this timesaving device did not mask his friendly and helpful nature. With those he knew well, he was a most interesting conversationalist with a subtle sense of humor and with many anecdotes about famous geologists and his own adventures in foreign lands.

James Marvin Weller was born on August 1, 1899, in Chicago, Illinois, the son of Stuart and Harriet Marvin Weller. He attended Chicago public schools and graduated from Hyde Park High School in 1917. He was in the United States Army officer’s train­ing school briefly in 1918. From the University of Chicago he received a B.S. degree with honors in 1923 and a Ph.D. in 1927.

Marvin was a member of Phi Beta Kappa, Sigma Xi, Kappa Epsilon Pi, Phi Gamma Delta, the Paleontological Society, the Geological Society of America, the American Association for the Advancement of Science, the American Association of Petroleum Geologists, and the Society of Economic Paleontologists and Mineralogists. He was president of the latter society from 1964 to 1965 and was made an Honorary Member in 1970.

Marvin was a field assistant for the Illinois Geological Survey from 1916 to 1918 and an assistant geologist in charge of mapping the Campbell Hill quadrangle in south­western Illinois in 1919. From 1920 to 1922 he was employed by the Whitehall Petro­leum Corporation of London for work in the Punjab area in India, now part of Pakistan, where he mapped geologic structures and described Tertiary stratigraphy, the subject of one of his earliest publications. In 1923 he worked for the Chanute Spelter Company, a subsidiary of American Metals Company, investigating the possibilities for lead mining in Ste. Genevieve County, Missouri.

In 1924 and 1925, Marvin worked for the Kentucky Geological Survey, mapping and describing the general geology of Edmonson County, Kentucky, as his Ph.D. thesis. The area includes Mammoth Cave, then the most famous cave in the world. He de­scribed it and other caves and made the first major attempt to work out the principles that govern formation of the caves in that region. In this publication he also described the Kentucky rock asphalt deposits, which were then becoming the source of a large industry.

When Marvin accepted the appointment as paleontologist for the Illinois Geological Survey in 1925, his first assignment was to study the paleontology and stratigraphy of the Pennsylvanian rocks. He spent much of the first three field seasons studying expo­sures and collecting fossils all over the state (375 collections). In this work he became aware of the regular order of repetition of the faunas and lithologic units and the wide distribution of the individual units throughout the state. The repetition of many lithologic types in the Pennsylvanian succession had been noted by the middle 1800s. In 1912 J. A. Udden described cyclical units in the Peoria region in Illinois. However, the regular order and wide extent had not been generally recognized.

At the same time, Harold R. Wanless was studying the Pennsylvanian stratigraphyof western Illinois, and he also recognized the cyclical arrangement and persistence of many units. Both Weller and Wanless soon became convinced that these units were important for correlations, for geologic mapping, and for understanding the origin of the sediments, and that they needed recognition as formal units. In 1932 they jointlyintroduced the term “ cyclothem” for the cyclical units.

MEMORIAL TO JAMES M A RVIN WELLER 3

As part of the Quarter Centennial Celebration of the Survey in 1930, Marvin organized a symposium on cyclical sedimentation during the Pennsylvanian Period, at which nine stratigraphers and paleontologists presented papers with differing concepts on regions from Pennsylvania to Texas.

In a 1953 paper in paleoecology (GSA Memoir 67, 1957), Marvin summarized his ideas on ecological factors and their importance in controlling the composition and distribution of the biota and described the characteristics and peculiarities o f each of the generally recognized members o f the Pennsylvanian cyclothem as developed in Illinois. Weller and Wanless considered the cause for the cyclothems to be largely tectonic. Later, Wanless and F. P. Shepard suggested eustatic changes in sea level, possibly caused by repeated glaciations in the southern hemisphere, as the major cause for the cyclothems. Others have suggested modifications or new theories, some placing major emphasis on climatic control in the source areas. Marvin steadfastly supported the tectonic theory (although he noted its problems and the strong points o f other concepts) in a major paper in 1956. His final publication on cyclothems, in the Encyclopedia Britannica (1974), is an excellent summary of the physical characters of the cyclothems and the theories of origin.

The reports o f Weller and Wanless stimulated interest in Pennsylvanian stratig­raphy and cyclical sedimentation, and a large amount o f literature on regional variations in the cyclothems has resulted. Although the characteristics o f cyclothems and many aspects o f their origin are still debated, cyclothems are firmly entrenched in Pennsyl­vania stratigraphy.

During the years o f intensive field studies, Marvin used the winter seasons to study the fauna, and he published ten papers on Pennsylvanian gastropods, crinoids, brachio- pods, sponges, and ophiuroids.

In 1937 and 1938, Marvin was on leave from the Survey to conduct a geological investigation for a Chinese syndicate that had a concession on the mineral rights in a large area in Kansu, Chinghai, and Sinkiang Provinces of northwestern China. He fortunately arrived just ahead o f the Japanese invasion of China, he witnessed Japanese air raids on Lanchow and Sian, and he was less than 100 miles from the battle front when the Japanese advanced to the Yellow River. Rather miraculously he completed two long traverses through the mountains and plateaus o f northern Tibet and along the southern edge of the Gobi Desert supported by one American geologist, Fred Sutton, and a party o f nine Chinese. After weeks o f delays and many exciting experiences, he left China by the “ side door,” through Chungking and by steamer down the Yangtze River to Hankow (then the capital), narrowly missing a severe air raid that destroyed the ship ahead. From there he flew to Hong Kong and sailed for home by way of Europe. His recommendations resulted in the discovery of the oil field at Shihyuho, which was for the Chinese the only domestic source o f oil during the war. On returning, he published several papers on the oil prospects o f the region and an outline o f Chinese geology.

Marvin returned to Mississippian stratigraphy and, with A. H. Sutton, published several papers on Chesterian correlations in Kentucky and Illinois. Their studies cul­minated in 1940 in a major report on the Mississippian border of the Eastern interior region. This report contains geologic maps of southeastern Missouri, southern Illinois, western Kentucky, and southern Indiana, compiled from the work o f several geologists, including unpublished maps by Stuart Weller.

Mostly from his father’s early mapping, Marvin compiled the geologic maps for seven quadrangles in southern Illinois, and they were published with summaries o f the stratigraphy in three reports.

The discovery in 1937 o f many new oil fields in the deep part o f the Illinois Basin

4 THE G E O LOGICA L SOCIETY OP AMERICA

stimulated interest in the oil possibilities of extreme southern Illinois. Already familiar with much of the Mississippian and Pennsylvanian stratigraphy, Marvin restudied the entire Paleozoic, Mesozoic, and Cenozoic succession and made numerous new inter­pretations of the geology of the region. Twenty years later, his conclusion that the prospects for commercial oil and gas in extreme southern Illinois are, on the whole, not particularly favorable has not been disproven.

In 1940 Marvin organized a symposium on Devonian stratigraphy of the Mississippi Valley as part of a program dedicating the State Natural Resources Building, which houses the State Geological Survey. The papers by eleven stratigraphers from seven states were published in 1944 in a Survey bulletin. In summarizing papers, G. Arthur Cooper and Marvin outlined and suggested answers to the major problems in Devonian correlations.

Marvin was made editor of the Journal o f Paleontology for the Society of Economic Paleontologists and Mineralogists in 1942 and, after moving to the University of Chicago, he continued in that position until 1952. During these years he published many short articles and notes discussing current problems in paleontology and stratig­raphy. He wrote more than forty reviews, which also gave him an opportunity to ex­press his views. The experience added greatly to his stature in the profession. One geologist wrote, “ Your shorter papers in the Journal o f Paleontology are the best read­ing that the journal affords.” A zoologist wrote, “ Your paper on ‘Fatuous species and hybrid populations’ should have been the lead article in the Journal o f Paleontology, rather than buried in the notes. The admonitions should be heeded by all young paleon­tologists and zoologists as well.”

One of his shorter articles (1947), emphasizing the close relationship of paleontology to geology, touched a sensitive spot and elicited strong dissents from those favoring closer ties with zoology and those favoring an essentially independent paleontology. Marvin said that the paper received more favorable comments than anything he ever wrote, and one professor stated that the article was a must for every student in paleon­tology. On the other hand, a Russian paleontologist was so incensed that he expressed his very low opinion of the author. Marvin commented that “ It is interesting that my little paper should give additional evidence of capitalistic degeneracy.” This was the exception to years of friendly correspondence with other Russian geologists.

In 1933 Marvin was appointed a member of the Committee on Stratigraphy of the National Research Council, which was organized to prepare the correlation charts of the various stratigraphic systems, published by the Geological Society of America. After ten years of study, the Pennsylvanian Subcommittee, with R. C. Moore as chair­man, published in 1944 an excellent chart in which H. R. Wanless, J. Marvin Weller, and J. Steele Williams were listed as chief assistants to the chairman.

In 1944 Marvin was appointed chairman of the Mississippian Subcommittee. In eleven years this committee had made only a little progress toward preparation of a correlation chart and was lagging behind others. Marvin believed that committee mem­bers would not contribute original material for the chart in acceptable time but would be quick to criticize a preliminary draft. Therefore, he wrote for information directly to over 400 geologists who had experience in the Mississippian stratigraphy of North America. He received enough support to merit listing 125 of them in acknowledgments in the final report. From these contributions he prepared correlation charts of each region. He received excellent support from his fifteen-member committee and many others in revising and correlating the columns, and by 1948 the final chart and report, the largest in the series, was published.

M EMORIAL TO JAMES M A RVIN W ELLER 5

From 1942 to 1945, as part of the war effort o f the Survey, Marvin with Robert M. Grogan and Frank E. Tippie, in cooperation with several Federal agencies, studied the fluorspar deposits o f southern Illinois. The primary objective, which was accomplished, was to maintain the production o f much-needed fluorspar. This resulted in a bulletin, published in 1952, describing the types of deposits, exploration methods, mining and milling, and the geology o f the various mining districts.

Marvin made many other contributions to the geology of Illinois, including (with the help o f others o f the Survey staff) a new state geologic map. He organized and led numerous field conferences. He led the first Tri-State (Illinois, Iowa, Wisconsin) Field Conference in 1933, which was organized by M. M. Leighton, A. C. Trowbridge, and W. H. Twenhofel. He led several other Tri-State conferences. He was a contributor to the guidebooks o f the 9th (1935), 12th (1938), 13th (1939), and 15th (1941) field con­ferences of the Kansas Geological Society. He organized and led field conferences held in conjunction with meetings of the American Association o f Petroleum Geologists and the Geological Society o f America in Chicago and St. Louis and several field trips for high school teachers o f geology. He was frequently consulted on stratigraphic aspects o f economic and engineering problems in Illinois.

Marvin had always wanted eventually to follow in his father’s footsteps as Pro­fessor o f Invertebrate Paleontology at the University o f Chicago, and when the call came in 1945, he could not pass it by. Nevertheless, he left the Survey with considerable regrets, partially because of his long friendship and high regard for M. M. Leighton, the Chief of the Survey. Shortly before leaving he wrote to a friend, “ I am proud of our Survey and o f my part in it.”

The change from the concentrated efforts on research at the Survey to the life of a professor was not an easy one, and he stated that the first two years at Chicago were the hardest o f his life. He was stimulated, however, by association with outstanding scientists at the university, many o f whom he had known for years—a few even in his college days. The thorough and systematic review o f the various fields o f stratigraphy needed for his courses continued through the years and eventually led to his writing two books.

In addition to teaching, Marvin continued editing the Journal o f Paleontology through 1951, added an associate editorship of the Journal o f Geology (1945 to 1957), and continued his projects for the National Research Council, including chairmanship of the Commission o f Stratigraphic Paleontology in 1951.

After the Mississippian correlation chart was completed, Marvin organized a sym­posium on problems o f Mississippian stratigraphy and correlation for the meeting of Section E of the American Association for the Advancement o f Science in Chicago in 1947. The papers by thirteen prominent stratigraphers were published together in the Journal o f Geology and have been widely used.

Marvin’s interest in trilobites reached a point where he felt that the need for im­proved organization was essential to further progress. Consequently, he undertook the task of compiling a bibliography of all trilobite generic names. By 1950, with the help of correspondents all over the world, he had a bibliographic catalog o f about 2,500 names, and he had studied and redescribed the types of all the Carboniferous trilobites known in the United States. His desire to complete a monograph on the Carboniferous and Permian trilobites was not realized, but he wrote seven papers on trilobites, ranging from descriptions o f genera and classification problems to an analysis o f trilobite generic nomenclature and its implications regarding progress in paleontology. In the latter article, he emphasized the need to shift emphasis from taxonomy to three overlapping

6 THE GEOLOGICAL SOCIETY OF AMERICA

fields: (1) the investigation of fossil populations with regard to their geographic and stratigraphic distribution and variations, (2) the investigation of the environmental rela­tions of fossil populations with regard to their biological and physical associations, and (3) the investigation of evolutionary trends in closely related sequent populations from precisely determined stratigraphic zones. He concluded that a new generation of students might have to be trained before such fundamental problems could be investigated effectively.

Marvin was a contributor to the Treatise o f Invertebrate Paleontology, Arthropoda, volume 1, published in 1959. His part dealt largely with Mississippian to Permian trilobites.

In 1958 Marvin reviewed the complex problem of facies nomenclature and pro­posed a simplified classification that has been widely used. He discussed twenty-one facies names and concludes that the only important names applied to sedimentary rocks are “ facies” and “ iithofacies” and to environments “ lithotope” and “ biotope.” Six other terms might be considered for special situations, but they had little practical value and should be avoided. All other terms could be rejected without loss.

His interest in sedimentation led Marvin to a lengthy study of the theoretical rela­tions between compaction of sediments and depth of burial. In 1959 he published a critical analysis of all the data he could obtain from the literature and from extensive correspondence. He gave a new porosity-depth curve for mud and shale but concluded that for sandstones no consistent relation exists between porosity and depth of burial; that the consolidation of limestone is not understood; and that the compaction of organic material, such as coal, is a complex process involving both elimination of pore space and loss of substance by chemical decay and metamorphism.

Marvin was chairman of the Glossary Review Committee that added 4,000 addi­tional terms and some revisions of definitions for the second edition of the Glossary o f Geology and Related Sciences, which was published in 1961 by the American Geological Institute. This edition served the profession until the current, greatly expanded glossary was brought out in 1972. Marvin was a contributor to all three editions.

From 1952 to 1954 Marvin was on leave from the university to conduct a survey of coal resources in the Philippines for the Mutual Security Agency and Foreign Opera­tions Administration of the U.S. Geological Survey. He took an active part with Philip­pine geologists in five projects; reports on these were published by the Philippine Bureau of Mines. He also supervised five other projects. This study gave him a first­hand knowledge of Tertiary coal basins, a renewed enthusiasm for applied stratigraphy, and another excursion into little known areas.

Marvin was on leave again briefly in 1956 to serve as a visiting professor at the University of Texas.

After several years of teaching, Marvin became convinced of the need in stratig­raphy for a book not emphasizing sedimentary petrology, but one that recognizes stratigraphy as the heart of the geologic sciences and its broad consideration of the scientific and philosophic aspects of geology—“ the common meeting ground of all geologists.” His book Stratigraphic Principles and Practice was published by Harper and Brothers in 1960. Except for a historical introduction and an appendix covering graphic representation and field work, the text concerns the nature and interpretation of the materials of stratigraphy and the relations, classification, and nomenclature of strati­graphic bodies. The book emphasizes the practical considerations that dominated the philosophy of its author. Perhaps not all will consider as entirely practical his list of special qualities required of a successful field geologist—a strong physique, knowledge

MEMORIAL T O JAMES MA RVIN W ELLER 7

and love of nature and the outdoor life, adaptability, basic training and experience, planning and executive ability, and diplomacy and tact.

Shortly before his death, Marvin essentially completed a manuscript for a book on paleontologic principles and practice, a companion volume for his Stratigraphic Prin­ciples and Practice. This manuscript is in the rare books and manuscripts collections of the University of Illinois Library, and a copy is in the files of the Illinois State Geological Survey.

Marvin’s second book, The Course o f Evolution, McGraw-Hill, 1969, expressed his belief that there was need for a greater emphasis on evolution in the teaching of paleontology. The book was designed to show the way that plants and animals have changed during half a billion years. It is on the intermediate level between the popular books on evolution and the highly specialized treatises on the subject. Much morpho­logic information is given in numerous illustrations. This book was Marvin’s last major contribution to geology, and it is fitting that his concluding remarks on human evolu­tion and the future should express so clearly, and regretfully, the implications o f a lifetime o f research.

If population increase is not checked in tim e, the high plateau o f accomplishment may be only a brief episode to be looked back upon perhaps as the golden age o f human attainment. . . . If worse com es to worst, the human race is likely to begin a long spiral, reproducing in reverse the history o f its rise from barbarism. . . . Natural selection will again direct his evolution in older adaptive ways, but the rebirth o f an advanced culture comparable to the present one will be im possible, because the necessary, easily obtained natural resources will have been thoroughly depleted.If all goes w ell, however, and man uses his wisdom and abilities in constructive w ays, the human race has a long future to look forward to .

Marvin’s thesis is not a message of doom, but it is a clear warning o f danger ahead if the human race fails to heed soon the lessons taught by the trends of evolution.

As a teacher Marvin was dedicated to developing a sound knowledge of basic information, a critical understanding, and the ability to write. Conciseness and clarity in scientific writing was required. His students admired and respected him for the high standards that he sought, and many of them remained close friends long after their university days. Matthew N. Nitecki has expressed the high regard o f one former stu­dent in his 1977 memorial to Weller (American Association o f Petroleum Geologists Bulletin, v. 61, p. 279-284).

On September 28, 1923, Marvin married Phyllis Vincent Gothwaite, his sweetheart since the seventh grade. It was a happy relationship that continued undiminished throughout his life. With Phyllis and their daughter Harriet, he enjoyed a happy and inspiring companionship. The excellent illustrations in both o f his books were prepared by his daughter. Many friends and colleagues enjoyed the social life o f their home.

Marvin found time for many activities. He was a master o f all trades—carpenter, plumber, electrician, and artisan. After their table silverware, a wedding present, was stolen, he made a beautiful hand-hammered set to replace it. For his daughter he built an accurate model o f the home they had built in Urbana. He continued to make addi­tions to a stamp collection started by his father, and he worked occasionally on a coin collection. He was interested in investment as a hobby and closely followed the markets. In his early days at the University o f Illinois, he belonged to a theatre guild and per­formed in faculty plays.

Marvin retired from the University of Chicago in 1965, moving his office to the

8 THE GEOLOGICAL SOCIETY OF AMERICA

Field Museum of Natural History where he was a research associate. His activities were restricted by failing health, and in 1966 he and his wife left for California to live near Harriet. He is survived by his wife, daughter, and a brother, Allen S. Weller, Professor of Art Emeritus and former Director of the Krannert Art Museum at the University of Illinois, Urbana.

Marvin will be missed by many geologists and friends throughout the world. It can best be said of Marvin what T. C. Chamberlin and R. C. Moore said of Marvin’s father, “ The loss that we all feel does not dim—rather it makes clearly revealed—the enrichment of geologic science and the added joy of companionship in research that have come through the life of Stuart Weller.”

Like his father and brother, Marvin was tall and broad shouldered. Those of us who enjoyed field work with him will not soon forget the long strides that carried him across the fields ahead of us, nor the ease with which he stepped over fences we had to climb. But, most of all, we will remember his unfailing skill and enthusiasm in deal­ing with the problems presented by every outcrop.

SELECTED BIBLIOGRAPHY OF J. M. WELLER

1926 (and Moulton, G. F.) Prospecting for Hoing sand oil pools: Illinois Geol. Survey Illinois Petroleum, no. 2, p. 3-4.

1927 The geology of Edmonson County, Kentucky (Geologic map, 1929): Kentucky Geol. Survey, ser. 6, v. 28, 246 p.

1928 The Cenozoic history of the northwest Punjab: Jour. Geology, v. 36, p. 362-375.1929 On some of Gurley’s unfigured species of Carboniferous Bellerophon: Illinois

Acad. Sci. Trans., v. 21, p. 313-325.----- The gastropod genus Yvania: Illinois Geol. Survey Rept. Inv. 18, 44 p.1930 Cyclical sedimentation of the Pennsylvanian Period and its significance: Jour.

Geology, v. 38, p. 97-135.----- On the occurrence of Platycrinus in Pennsylvanian strata of western Indiana:

Illinois Acad. Sci. Trans., v. 22, p. 478-484.----- Ophiuroid remains of Pennsylvanian age: Jour. Paleontology, v. 4, p. 1-13.----- A new species of Euphemus: Jour. Paleontology, v. 4, p. 14-21.----- Siliceous sponge spicules of Pennsylvanian age from Illinois and Indiana: Jour.

Paleontology, v. 4, p. 233-251.----- A group of larviform crinoids from lower Pennsylvanian strata of the eastern

interior basin: Illinois Geol. Survey Rept. Inv. 21, 38 p.1931 Sedimentary cycles in the Pennsylvanian strata; a reply: Am. Jour. Sci., ser. 5,

v. 21, p. 311-320.----- Pennsylvanian overlap in United States: Am. Assoc Petroleum Geologists Bull.,

v. 15, p. 704-707.----- The conception of cyclical sedimentation during the Pennsylvanian Period:

Illinois Geol. Survey Bull. 60, p. 163-177.----- The Mississippian fauna of Kentucky, in The paleontology of Kentucky:

Kentucky Geol. Survey, ser. 6, v. 36, p. 249-290.----- Pallial sinuses of Composita argentia: Illinois Acad. Sci. Trans., v. 24,

p. 354-359.

MEMORIAL TO JAMES MARVIN W ELLER 9

1932 (and Sutton, A. H.) Lower Chester correlations in western Kentucky and Illinois: Jour. Geology, v. 40, p. 430-442.

------ (and Wanless, H. R.) Correlation and extent o f Pennsylvanian cyclothems:Geol. Soc. America Bull., v. 43, p. 1003-1016.

1933 (and McGehee, J.) Typical form and range of Mesolobus mesolobus-. Jour. Paleontology, v. 7, p. 109-110.

1934 The Warsaw formation: Illinois Acad. Sci. Trans., v. 26, p. 106.------ (and Hubbert, M. K.) Location o f faults in Hardin County, Illinois, by the

earth resistivity method: Am. Inst. Mining, Metall. Eng. Trans., v. 110, p. 40-47.1935 Boundaries o f Pennsylvanian cyclothems [abs.]: Illinois Acad. Sci. Trans., v. 27,

p. 121.------Adolescent development o f Ditomopyge: Jour. Paleontology, v. 9, p. 503-513.------ Permian trilobites from the central Himalayas: Connecticut Acad. Sci. Mem.,

v. 9, p. 31-35.------ Illinois road log: Kansas Geol. Soc. Guidebook 9th Ann. Field. Conf., p. 38-60.1936 (and Bell, A. H.) The geology and oil and gas possibilities of parts of Marion and

Clay Counties with a discussion o f the central portion of the Illinois basin: Illinois Geol. Survey Rept. Inv. 40, 54 p.

------ “ Grassy Creek” shale: Illinois Acad. Sci. Trans., v. 28, p. 191-192.------ Geology and oil possibilities o f the Illinois basin: Illinois Geol. Survey Press

Bull. Ser., Illinois Petroleum 27, 19 p.------ Carboniferous trilobite genera: Jour. Paleontology, v. 10, p. 704-714.1937 Evolutionary tendencies in American Carboniferous trilobites: Jour. Paleontology,

v. 11, p. 337-346.------ (and Bell, A. H.) Illinois Basin: Am. Assoc. Petroleum Geologists Bull., v. 21,

p. 771-788; also Illinois Geol. Survey Press Bull. Ser., Illinois Petroleum 30,18 p.------ (and Newton, W. A.) Stratigraphic studies of Pennsylvanian outcrops in parts

o f southeastern Illinois: Illinois Geol. Survey Rept. Inv. 45, 31 p.------ Sea level and climatic changes related to late Paleozoic cycles: Discussions:

Geol. Soc. America Bull., v. 47, p. 2011-2013.------ Progress in geologic mapping of Illinois 1839-1936: Illinois Acad. Sci. Trans.,

v. 29, p. 192-193.1939 (and Wanless, H. R.) Correlation o f minable coals o f Illinois, Indiana, and

western Kentucky: Am. Assoc. Petroleum Geologists Bull., v. 23, p. 1374-1392; Illinois Geol. Survey Circ. 48, 20 p.

------ (and McQueen, H. S.) Composite stratigraphic section o f Illinois and Missouri:Kansas Geol. Soc. Guidebook 13th Ann. Field Conf., p. 12-13.

------ (and McQueen, H. S.) Catalog of formation names o f southwestern Illinois andsoutheastern Missouri: Kansas Geol. Soc. Guidebook 13th Ann. Field Conf., p. 159-171.

------ Generalized stratigraphic section of Illinois bluffs o f Mississippi River fromEast St. Louis to Thebes: Kansas Geol. Soc. Guidebook 13th Ann. Field Conf., p. 14-15; road log, p. 16-56.

------ Devonian system: Kansas Geol. Soc. 13th Ann. Field Conf., p. 127-130.------ Mississippian system: Kansas Geol. Soc. Guidebook 13th Ann. Field Conf.,

p. 131-137.------(and Weller, S.) Preliminary geological maps o f the pre-Pennsylvanian formations

in part o f southwestern Illinois; Explanation and stratigraphic summary by J. Marvin Weller: Illinois Geol. Survey Rept. Inv. 59, 15 p.

10 THE-: GEOLOGICAL SOCIETY OF AMERICA

1939 Explanation and stratigraphic summary, in Preliminary geological map of the Mississippian formations in the Dongola, Vienna, and Brownfield quadrangles: Illinois Geol. Survey Rept. Inv. 60, 11 p.

1940 Geological exploration in northwestern China: Tulsa Geol. Soc. Digest, p. 19-20. ----- (and Sutton, A. H.) Mississippian border of Eastern Interior basin: Illinois Geol.

Survey Rept. Inv. 62; Am. Assoc. Petroleum Geologists Bull., v. 24, no. 5, p. 765-858.

----- (and Ekblaw, G. E.) Preliminary geologic map of parts of the Alto Pass, Jones­boro, and Thebes quadrangles; Explanation and stratigraphic summary by J. Marvin Weller: Illinois Geol. Survey Rept. Inv. 70, 26 p.

----- Geology and oil possibilities of extreme southern Illinois: Illinois Geol. SurveyRept. Inv. 71, 71 p.

----- Generalized stratigraphic and structure section of Illinois bluffs of MississippiRiver from Nauvoo to southern Calhoun County: Kansas Geol. Soc. Guidebook 15th Ann. Field Conf., p. 68-69; road log, p. 70-80.

----- (and Bell, A. H.) Explanation and stratigraphic summary, in Surface structuremap of Shelby, Effingham, and Fayette Counties: Illinois Geol. Survey Rept.Inv. 76, 21 p.

1942 (and Moore, R. C., and Knight, J. B.) Erroneous emendation of generic names: Jour. Paleontology, v. 16, p. 278-283.

----- (and Wanless, H. R., Cline, L. M., and Stookey, D. G.) Interbasin Pennsylvaniancorrelations, Illinois and Iowa: Am. Assoc. Petroleum Geologists Bull., v. 26, p. 1585-1593.

----- (and Henbest, L. G., and Dunbar, C. O.) Stratigraphy of the fusuline-bearingbeds of Illinois: Illinois Geol. Survey Bull. 67, p. 9-34.

----- Rhythms in Upper Pennsylvanian cyclothems: Illinois Acad. Sci. Trans., v. 35,p. 145-146; also Illinois Geol. Survey Circ. 92.

1944 Devonian system in southern Illinois: Illinois Geol. Survey Bull. 68, p. 89-102. ----- Devonian correlations in Illinois and surrounding states, a summary: Illinois Geol.

Survey Bull. 68, p. 205-213.----- Permian trilobite genera: Jour. Paleontology, v. 18, no. 4, p. 320-327.----- Outline of Chinese geology: Am. Assoc. Petroleum Geologists Bull., v. 28,

p. 1417-1429.----- Petroleum possibilities of Red Basin of Szechuan Province, China: Am. Assoc.

Petroleum Geologists Bull., v. 28, p. 1430-1439.1945 (and others) Geologic Map of Illinois: Illinois Geol. Survey.----- (and Grogan, R. M.) An occurrence of granite in Pope County, Illinois: Jour.

Geology, v. 53, p. 398-402.1946 Stratigraphic summary, in Pennsylvanian ostracodes of Illinois: Illinois Geol.

Survey Bull. 70, p. 11-14.1947-Invertebrates in Pennsylvanian correlations: Jour. Geology, v. 55, p. 254-260. ----- Relations of the invertebrate paleontologist to geology: Jour. Paleontology,

v. 21, no. 6, p. 570-575.----- Tegmen structure of Pterotocrinus capitalis (Lyon): Jour. Paleontology, v. 21,

no. 6, p. 581-584.1948 (and Knight, J. B.) The application of Opinion 138 to some recently published

names: Jour. Paleontology, v. 22, p. 107-110.----- New Mississippian stratigraphic names: Am. Jour. Sci., v. 246, no. 3, p. 150-151.

MEMORIAL TO JAMES MA RVIN W ELLER 11

----- (and Mississippian Subcommittee) Correlation of the Mississippian formationsof North America: Geol. Soc. America Bull., v. 59, p. 91-196.

----- Paleontologist—Biologist and geologist: Jour. Paleontology, v. 22, p. 268-269.----- Introduction to symposium on problems of Mississippian stratigraphy and corre­

lations: Jour. Geology, v. 56, no. 4, p. 253-254.1949 Paleontologic classification: Jour. Paleontology, v. 23, no. 6, p. 680-690.1950 (Review) 1st eine unverftnderliche Form des Art-Names mttglich? (Is an unchanging

form of species names possible?), in Senckenbergiana, v. 25, p. 340-356, 1942: Jour. Paleontology, v. 24, p. 507-512.

1952 Analysis of trilobite generic nomenclature and its implications regarding progress in paleontology: Jour. Paleontology, v. 26, no. 2, p. 137-147.

----- (and Grogan, R. M., and Tippie, F. E.) Geology of the fluorspar deposits ofIllinois: Illinois Geol. Survey Bull. 76, p. 147.

----- (and Miller, R. L.) Significant comparisons in paleontology: Jour. Paleontology,v. 26, p. 993-996.

1955 Protista—Non-plants, non-animals?: Jour. Paleontology, v. 29, no. 4, p. 707-710.----- Fatuous species and hybrid populations: Jour. Paleontology, v. 29, p. 1066-1069.----- (and Vergara, J. F.) Geology and coal resources of the Bulalacao Region Mindoro

Oriental: Philippine Bur. Mines, Spec. Projects Ser. 1, 37 p.----- (and Crispin, O. and Ibafliz, C.) Geology and coal resources of the Paflganiban

Region, Catanduanes: Philippine Bur. Mines, Spec. Projects Ser. 2, 23 p.----- (and Crispin, O. and Vergara, J. F.) Geology and coal resources of Batan Island,

Albay: Philippine Bur. Mines, Spec. Projects Ser. 3, 51 p.----- (and de los Santos, Victor) Geology and coal resources of the Hitoma-Manambrag

Region, Catanduanes: Philippine Bur. Mines, Spec. Projects Ser. 4, 26 p.1956 Argument for diastrophic control of late Paleozoic cyclothems: Am. Assoc.

Petroleum Geologists Bull., v. 40, p. 17-50.1957 Paleoecology of the Pennsylvanian Period in Illinois and adjacent states, chapter

13, in Ladd, H. S., ed., Paleoecology: Geol. Soc. America Mem. 67, p. 325-364.1958 Cyclothems and larger sedimentary cycles of the Pennsylvanian: Jour. Geology,

v. 66, p. 195-207.----- Stratigraphic facies differentiation and nomenclature: Am. Assoc. Petroleum

Geologists Bull., v. 42, p. 609-639; also in Facies and the reconstruction of environments: Am. Assoc. Petroleum Geologists Repr. Ser., p. 101-131.

----- (and Wheeler, H. E., and Murray, H. H.) Discussion: Cyclothems: Am. Assoc.Petroleum Geologists Bull., v. 42, p. 442-452.

1959 Compaction of sediments: Am. Assoc. Petroleum Geologists Bull., v. 43, p. 273-310.

----- Technical vagaries of geologic language: Jour. Geol. Education, v. 7, p. 22-24.1960 (and glossary review committee) Supplement to Glossary of geology and related

sciences: Am. Geol. Inst., 72 p.----- Authorship of name Mesolobus striatus: Jour. Paleontology, v. 34, p. 762.----- Development of paleontology: Jour. Paleontology, v. 34, p. 1001-1019.----- Stratigraphic principles and practice: New York, Harper and Brothers, 725 p.1961 Patterns in Pennsylvanian cyclothems, in Origin and constitution of coal, third

conference, Crystal Cliffs, Nova Scotia, 1956: Halifax, Nova Scotia Dept. Mines, p. 129-171.

----- The species problem: Jour. Paleontology, v. 35, p. 1181-1192.

12 T H E GEOLOGICAL SOCIETY 01- AMERICA

1964 Development of the concept and interpretation of cyclic sedimentation, in Merriam. D. F., ed., Symposium on cyclic sedimentation: Kansas Geol. Survey Bull. 169, v. 2, p. 607-621.

1965 Presidential address: The status of paleontology: Jour. Paleontology, v. 39, p. 741-749.

----- Palaeontology, evolution and taxonomy, in Dr. D. N. Wadia CommemorativeVolume: Calcutta, India, Mining, Geol. and Metall. Inst. India, p. 217-225.

1968 Evolution of mammalian teeth: Jour. Paleontology, v. 42, p. 268-290.1969 The course of evolution: New York, McGraw-Hill Book Co., 696 p.1974 Cyclothems: Encyclopedia Britannica, 15th edition, v. 5, p. 396-400.

Pr in ted in U.S .A. 4 /7 8