Raised Beaches of Lahe Micliigan. 189 



Prof. Mai'cy has representatives of the above beds in their natural order, 

 in a glass cylinder. He also has the organic remains referred to. The bone 

 is a portion of the femur of a deer — (species not determined). The oak 

 wood is well preserved but the cedar is mangled and slivered. Prof. Marcy 

 also has specimens of mollusks collected from the marl beds associated with 

 the peat in No. "7" of the above section. The following are specifically 

 identified — 1. Planorbis campanulatus. 2. Planorbis pava. 3. Amnicola 

 hinosa. 4. Pisidium dubium. 5. Cyclas sulrata. 



Unios of various sizes occur, which are not specifically identfied. There 

 are also other molluscan remains not included in the above species. 



Mr. H. M. Bannister of the Illinois Geological Survey, mentions the fossils 

 found in these beach lines in Vol. Ill, p. 242, of the Illinois Geological Reports. 

 He states that there are found existing, species of Unio, Pisidium, Physa, 

 Lymna, Planorbis, Volvata, Amnicola, Milantho and Ancylus. 



A partial exposure at the jDoint on the shore represented by Prof. Marcy's 

 section abave given, was examined by the writer in 1887, and the following 

 section obtained: 



1 . Yellowish red (iron-stained) sand 3-5 feet 



2. Band of bog iron ore granular 4-6 inches 



•3. Gravel with beds of sand included 5-7 feet 



The stratification is very irregular in thickness and assorting very imper- 

 fect) — 



4. Coarse sand not calcareous 6-12 inches 



5. Calcareous loam 3 inches 



6. Yellow clay very calcareous with leaves embedded 3 inches 



7. Carbonaceous band not calcareous 3 inches 



8. Yellow calcareous clay similar to No. " 6 " 4-6 inches 



fl. Band of carbonaceous material not calcareous 2 inches 



10. Brown sand with twigs and peaty material 8-10 inches 



11. Water bearing sand 



Talus obscures the lower portion of the bluff. Nos. "6" and "S"' contain 

 gasteropod shells. 



Several exposures of Nos. "6 — 9"' were noted along the lake blufi: further 

 north. They were found well developed at outcrops beyond, i. e. , further 

 northwest than the outcrops of beach deposits, which overlie them in the 

 above section. Beneath them is a yellowish sand four feet or more in 

 depth, and beneath the sand resting upon a pebbly clay is an occasional 

 outcrop of humus soil, probably No. "9" of Prof. Marcy"s section. 



In a cut where the wagon road comes down to the lake shore, south of 

 the Evanston waterworks, the peat beds pass back into the peaty soils of the 

 low land west of this beach ridge. The connection of this peaty bed with 

 that beneath the eastern ridge of the middle beach, has already been dis- 

 cussed in connection with that ridge. 



The profile of Fullerton Avenue conduit in tlie north part of Chicago 

 shows the depth of sand and gravel through the entire width of the deposit 

 between the lake sliore and Chicago river. The ridge portion of the lower 



