302 LIFE OF THE PLEISTOCENE 



Ohio and Switzerland counties show the following strata: (I, NVV L£ Sect. 

 6, T. 3, R. 2 W. ; II, Sect. 4, T. 5 R. 12 E.) 



I 



Soil and clay 22 feet 



Yellow sand, quite hard or cemented 9 " 



Blue clay, quite hard, without pebbles V/2 " 



Rotten leaves, twigs, black soil, wood, and thick bark 1}^ " 



Coarse sand, gravel and shelly stone 9 " 



Hard blue limestone 1 " 



Height of section 44 feet 



II 



Soil and clay, more whitish at lower part 22 feet 



Blue mud, resembling recent alluvium 6 " 



Black soil containing leaves, cedar wood and ochreous particles 3 " 



Small stones packed together like a macadamized road , 1 " 





Height of section 32 feet 



The old soil and wood are evidently referable to the Sangamon interval. 



At Lawrenceburg, Dearborn County, organic remains occur which are to 

 be referred to the Sangamon interval. A section of the river bank presents 

 the strata as shown below: 95 



1. Soil 1-2 feet 



2. Clay 6 



3. Sand, clay, gravel, loam 30 



4. Ochreous sand (containing land shells) V/t 



5. Carbonaceous clay containing old forest bed and ancient soil 7 



6. Ochreous sand 1J^ 



7. Clean gravel 6 



Low water x 



Height of section 53 feet 



The forest bed contains six species of plants. 



Platanus occidentalis Aescnlus glabra- 



Fagns ferruginea Juniperus viginianus 



Carya alba Echinocystis lobata? (seed only) 



A rich fauna of land mollusks occurs above the forest bed in the ochreous 

 deposit; 29 species being listed by Billups. 93 The shells were first seen in 



M Orton, Geol. Ohio, I, p. 428. 

 " Nautilus, XVI, p. 51. 



