Sedimentary Geology, 77 (1992) 297 297 Elsevier Science Publishers B.V., Amsterdam

Contents Volume 77, 1992

Dolomite-carbonate replacement textures in veins cutting Carboniferous rocks in East Fife Alison Searl (Birmingham, UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Fluvial, coastal, nearshore, and shelf deposition in the Upper Proterozoic (?) to Lower Cambrian Addy Quartzite, northeastern Washington Kevin A. Lindsey (Richland, Wash., USA) and David R. Gay|ord (Pullman, Wash., USA) . . . . . . . . . . . . . . . . . . . . . . . 15

Groundwater ferricretes from the Silurian of Ireland and Permian of the Spanish Pyrenees V.P. Wright (Reading, UK), R.J. Sloan (London, UK), B. Valero Garc6s (Zaragoza, Spain) and L.A.J. Garvie (Glasgow, UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Geochemical and detrital mode evidence for two sources of Early Proterozoic sedimentary rocks from the Tonto Basin Supergroup, central Arizona Kent C. Condie, Phillip D. Noll, Jr. (Socorro, N.M., USA) and Clay M. Conway (Flagstaff, Ariz., USA) . . . . . . . . . . . . . 51

Genesis and significance of the silico-aluminous nodules in the Ordovician of the Montagne Noire and the Massif Armoricain (France) Jean-Francois Becq-Giraudon (Orl6ans, France), Suzanne Bouill6 and Jean-Jacques Chauvel (Rennes, France) . . . . . . . 77

Calcic paleosols of the Plio-Pleistocene Camp Rice and Palomas Formations, southern Rio Grande rift, USA Greg H. Mack (Las Cruces, N.M., USA) and W.C. James (Columbus, Ohio, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Importance of dust storms in the diagenesis of sandstones: a case study, Entrada sandstone in the Ghost Ranch area, New Mexico, USA H. Orhan (Konya, Turkey) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Hummocky cross-stratified deposits and turbidites in some sequences of the Umbria-Marche area (central Italy) during the Toarcian Paolo Monaco (Perugia, Italy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

Roundness parameters in barrier-lagoon systems in northeastern Shandong Peninsula, China: limitations to environmental discrimination Wang Ping and Li Congxian (Shanghai, China) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143

Erratum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Lower Permian Rotliegend sandstones, southern North Sea: a case study of sandstone diagenesis in evaporite-associated

sequences K. Purvis (Reading, U.K.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155

The seismic facies of a tidally influenced Holocene delta: Boundary Bay, Fraser River delta, B.C. H.M. Jol (Calgary, Alta., Canada) and M.C. Roberts (Burnaby, B.C., Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173

Provenance and evolution of Miocene turbidite sedimentation in the central Apennines, Italy U. Chiocchini (Viterbo, Italy) and N. Cipriani (Firenze, Italy) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185

Characteristics of a Pennsylvanian ravinement surface Y. Liu and R.A. Gastaldo (Auburn, Ala., U.S.A.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197

Suhaqueous giant (15 m) and supergiant (40 m) dunes from the Lower Permian Vryheid Formation of the Karoo Supergroup, northern Natal, South Africa A.M. Smith (Durban, South Africa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215

Depositional sequences from high-concentration turbidity currents, Cretaceous Uhangri Formation (SW Korea) S.S. Chun and S.K. Chough (Seoul, Korea) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225

Mineralogy and chemistry of the opaques of Cox's Bazar (Bangladesh) beach sands and the oxygen fugacity of their provenance S. Mitra, S.S. Ahmed (Calcutta, India) and H.-S. Moon (Seoul, Korea) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

Skeletal aragonite dissolution from hypersaline seawater: a hypothesis S. Qing Sun (London, U.K.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249

Rhythmic shelf storm beds: Proterozoic Kaimur Formation, India C. Chakraborty and P.K. Bose (Calcutta, India) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

Textural characteristics and interpretation of second-cycle, debris-flow-dominated alluvial fans (Devonian of Northern Scotland) T. Dec (Glasgow, U.K.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269