. Bulletin of the Geological Society of America. Geology. 338 W. UPHAM—PREGLACIAL AND POSTGLACIAL VALLEYS. there has a thickness of 10 to 12 feet, and alono- an extent of at least 200 feet it incloses very abundant rock fragments up to tliree or four inches in diameter, many others of larger size, and frequent boulders u[) to four feet ill diameter, of all which a considerable i)roportion bear distinct glacial striae. Under the till of that excavation, and divided from it at a definite level plane, is the stratified sand and fine gravel of number 3- Again, the same thin sheet of true till, wit
. Bulletin of the Geological Society of America. Geology. 338 W. UPHAM—PREGLACIAL AND POSTGLACIAL VALLEYS. there has a thickness of 10 to 12 feet, and alono- an extent of at least 200 feet it incloses very abundant rock fragments up to tliree or four inches in diameter, many others of larger size, and frequent boulders u[) to four feet ill diameter, of all which a considerable i)roportion bear distinct glacial striae. Under the till of that excavation, and divided from it at a definite level plane, is the stratified sand and fine gravel of number 3- Again, the same thin sheet of true till, with occasional Archean boulders up to five feet in diameter, was seen on two large plateau areas in the northeast angle of Independence and Bading streets, on the opposite side of this railroad and an eighth to a fourth of a mile southwest of the fore- going place. Both of these till deposits are probably a part of the west- ward extension of the Newburg moraine. Most of the excavations for brick-making, however, which are numer- ous within a third of a mile southeast and south of these localities, have no well defined till, Init instead the stratum number 2 of the Clark Avenue section is represented by a thickness of 15 to 20 feet of compact, dimly stratified clay, holding no boulders, only very rare small stones,. Figure 3.—Section from the Leipsic Beach and Big Creek north along Gordon Avenue to the Lake. I. L,eipsic beach. 2. Belmore or Sheridan beach. 3. Upper Crittenden or Woodland Avenue beach. 4. I,ower Crittenden or Euclid Avenue beach. and no perceptible gravel or sand. This bed reaches eastward beyond Petrie street and south to the Forest City i)ark, as revealed in i)its for l)rick-making ; and ditches for laying water })ipes show it to continue as the surface formation at least about a mile farther south, to the vicinity of the intersection of Independence and Harvard streets. SOUril-TO-XORTII SECTION IN THE WEST PART OF CLEVELAND. The relationships of the shale,
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