28 James E. Conkin, Barbara M. Conkin, William T. Mason, Jr. 



different lithologies; nevertheless, the sections exhibit a good overall 

 agreement in regard to larger lithologic units. 



Section 1 Thickness 



Recent Feet Inches 



Soil 



7. Sand, silt, and gravel; humus in upper portion; snail 



fragments; partially a spoil bank 1 



6. Silt, brown, with infrequent small gravel 2 



Total 3 

 Pleistocene 

 Upper unit 



5. Silt, as in bed 6, but lighter colored, buff brown, 



with small gravel ...... 2 



4. Silt, light -buff colored; infrequent gravel 1 



3. Silt, light buff; caliche pockets; sparse occurrence 



of snails 1 



2. Like bed 3, but gravel larger and more abundant 1 



Total 5 

 Lower unit 



1. Sand, and medium to small gravel; no snails noted; 



base not exposed 1 



Total thickness of measured section 9 



Section 2 Thickness 



Recent Feet Inches 



Soil 



10. Silt, tan-brown; vegetation; with snails; not measured. 



9. Silt, tan-brown 2 



8. Silt, light tan to buff; frequent snails 1 



Total 3 

 Pleistocene 

 Upper unit 



7. Silt, light tan to buff; no darkened soil color; small 

 gravel layer in lower 1 to 2 inches; lateral variation, 

 one gully has rare snails in calichified silt, a nearby 



gully shows frequent snails 2 



6. Like bed 7, with some gravel; more snails in one 



gully; caliche beds in nearby gully 2 



5. Like beds 6 and 7; leached in lower half; silt with 

 infrequent snails, grading into silt with abundant snails 2 



4. Like bed 5, with caliche nodules and some clayey 



shale; rare to infrequent snails 2 



3. Silt, tan-buff, with pockets of fine to medium-grained 

 quartz sand; caliche pockets; no snails noted; clay, % 



to 1 inch thick, at bottom 1 



2. Sand, quartzose, medium to coarse-grained; no caliche 

 noted; rare pebble-gravel bed immediately overlying an 



erosional unconformity; no fossils noted 9 



Total 9 9 



