GEOLOGY OF HAMILTON, WARREN AND WASHINGTON COUNTIES 149> 



formed. The following section was measured in the large block 

 above referred to. The strike is n 57 e, dip 7 w, true meridian. 

 No. 5 2 feet of rather thinly bedded, fine, black limestone, with 

 abundant fossils. 



No. 4 2 feet 6 inches of heavily bedded limestone rich in fossils. 

 The grain is finer than no. 3, and abundant quartz grains 

 occur through the rock. 



No. 3 3 feet 6 inches of hard, coarse limestone, in 8 layers. 



No. 2 6 inches to 14 inches of loosely textured, shattered lime- 

 stone; white where weathered but dark inside; finely 

 crystalline. 



No. 1 1 foot hard limestone with abundant brachiopods, but not 

 well preserved. 

 A number of fossils have been gathered from these ledges, which 



have been kindly determined for us by Gilbert Van Ingen. as. 



follows : 



No. 5 Hormospira alexandra Billings 



Illaenus sp. 



Cyrtoceras 



Orthoceras cf. trochleare Hall, 1847 



Strophomena incurvata Shepard 



Crinoid, columnar plates 

 No. 4 Fragmentary fossils abundant but not adapted to sharp 

 determination. Crinoid stems, brachiopods, trilobites and corals 

 all recognizable. Illaenus sp. was the only one generically 

 recognized. This layer also contains sand and pebbles of 

 quartzite and gneiss, up to 3 to 4 inches in diameter, to which 

 reference will be made below. 



No. 3 This is the most productive layer, and its fossils are well 

 preserved. 



Strophomena incurvata Shepard 

 Plectambonites sericeus Sowerby 

 Isotetus gigas Dekay 

 Dalmanella testudinaria Dalm&n 

 Ceraurus pleurexanthemus Green 



