CARBONIFEROUS. 391 



1. Sandstone 15 feet. 



2. Sandy clay 60 feet. 



3. Sandstone 5 feet. 



4. Sandy clay 50 feet. 



5. Sandstone « 2 feet. 



6. Sandy clay 40 feet. 



7. Sandstone 7 feet. 



8. Sandy clay 35 feet. 



9. Sandstone 11 feet. 



10. Clay 15 feet. 



1 1. Sandstone 3 feet. 



12. Sandy clay 20 feet. 



Total 263 feet. 



Eight or ten miles northwest of San Saba. Beginning at the top. 



1. Sandstone 5 feet. 



2. Sandy clay 25 feet. 



3. Sandstone 4 feet. 



4. Clay, somewhat sandy 95 feet. 



5. Sandstone 6 feet. 



6. Clay * 7 feet. 



7. Sandstone, with clay partings 15 feet. 



8. Sandy clay 20 feet. 



9. Shaly saDdstone 15 feet. 



10. Sandy clay 100 feet. 



1 1 . Sandstone 2 feet. 



12. Sandy clay 13 feet. 



13. Sandstone , 3 feet. 



14. Sandy clay 8 feet. 



15. Sandstone 6 feet. 



16. Sandy clay 55 feet. 



17. Sandstone, with some clay partings 16 feet. 



18. Sandy clay 30 feet. 



Total . . 428 feet. 



A description of the rock material forming the Bend division was given in 

 my report on "The Southern Border of the Central Coal Field," in the First 

 Annual Report of this Survey, pages 147 to 150, and it is unnecessary to re- 

 peat it here. 



PALEONTOLOGY. 



The fossils of the series are generally quite numerous and ordinarily well 

 preserved. The conditions for their preservation seem to have been very 

 favorable, 



