VOL. 74, NO. 1922_

Evidence is accumulating to show that the ice frontretreated unevenly. Ice remained in the valleys forsome time after it had melted from the hilltops. Sucha condition was favorable for the formation of tem-porary lakes, not only in northward flowing valleys,but also in valleys flowing southward.One of the lake deposits made up in part of varved

clay is in southwestern Paint Township, in northeast-ern Holmes County, in the upper end of the valleyof Middle Fork of Sugar Creek.2 A well marked flat,now somewhat dissected by gullies to a depth of about20 feet, is present on either side of the Mt. Hope-Winesburg road, two miles east of the first namedvillage. The top of the terrace is approximately1,110 feet above tide. A section of the material atthe top of the terrace, measured in a newly excavatedroad-bank two miles east of Mt. Hope shows the fol-lowing:

Fine gravel ..... ... ... ...

Sand

Sand and clay layers, fairly even, eachlayer about i to 1 inch thick.

Ft. In.

3 00 10

6 0

A short distance to the northwest, along a sideroad, about 10 feet lower than the deposits above,layered material resembling varved clay is present.It consists of evenly bedded sand layers about e inchthick and layers of soft, soapy, bluish gray clay from1 to 11 inches thick. The clay layers contain thinstreaks of sand about 1/64 inch in thickness. Theclay layers can be separated along the thin sandpartings.

Another deposit of layered clay was laid down inthe southwestern part of Section Four, the southeastcorner of Section Five and the northern part of Sec-tion Nine, Salt Creek Township, in the head of thevalley of a small stream flowing southwest to MartinsCreek.3 This deposit is cut by the stream. The area

is covered by irregular deposits of sand and gravel,giving a hummocky expression to the valley filling.The gravel and sand were probably washed into thelake after the deposition of the underlying clay anddeposited around ice blocks. Along the road in cen-

tral northern Section Nine, 20 feet of varved materialis exposed. It consists of horizontal layers of clayand fine sand. The clay layers vary in thickness fromI to i inch, and the sand layers from one to twoinches.About three fourths of a mile to the northeast, in

the southeastern part of Section Five, the relation-ship of the lake deposit to the underlying till is shownby the following section:

2 Shown on the Millersburg and Navarre topographicsheets of the United States Geological Survey.

3 Millersburg sheet.

Clay and sand layers, clay layers thethicker ..........................................................................

Gravel, small pebbles ...........................................Boulder clay, yellow, containing cob-

bles to 6 inches............Boulder clay, hard, tough, grayish

blue, silty.....................................................................

Ft. In.

7 01 5

2 3

25 4

Some poorly exposed layered silt occurs in the val-ley of Martins Creek, one mile southeast of Benton,Salt Creek Township,3 at an elevation of approxi-mately 1,020 feet. To the northwest of Benton, kameterrace gravels overlie sand in which stratification isnot well developed.

Layered clay is associated with the kame terrace onthe eastern side of Killbuck Valley in the northernpart of Millersburg, the county seat.3 Clay fourfeet thick overlain by six feet of gravel is exposedat the end of North Grant Street. It is made up oflayers 1 to i inch thick, separated by sand layersabout 1/16 inch in thickness. The banding of thisdeposit may not be seasonal.

It is hoped that other deposits will be found andthat sufficient data can be secured to correlate thedeposits. A study of the till, and of the valleygravels, mainly of kame terrace type, is also inprogress. GEORGE W. WHITEDEPARTMENT or GEOLOGY,

UNIVERSITY or NEW HAMPSHIRE,DURHAM, N. H.

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HOWARD, ALBERT and YESHWANT D. WAD. The WasteProducts of Agriculture. Pp. xiv + 167. 14 plates.Oxford University Press.

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STRONG, EDWARD K. Change of Interests with Age. Pp.233. Stanford University Press. $4.00.

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WALKER PRIZES IN NATURAL HISTORYTwo prizes, founded by the late Dr. William Johnson Walker, are annually offered by the BOSTON

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