114 KANSAS UNIVERSITY QUARTERLY. 



duration is only moderate, and it weathers into many grotesque forms 

 Cross-bedding is well exhibited by it in many localities. 



17. Purple to greenish-colored clay 60 ft. 



This is apparently an unfossiliferous layer, excej^t in the uppermost 



horizon, where species of dinosaurs belonging to the genera Bronto- 

 saurxis and Morosaurus occur. 



18. Sandstone, grayish to light brown 10 ft. to 20 ft. 



The above sandstone presents some very interesting stratigraphic 



phenomena. It has, at the base, a layer of conglomerate about 2| ft. 

 thick. The conglomerate is composed of small silicious and argil- 

 laceous pebbles, and is not very coherent. Something like two feet of 

 sandstone rests upon the conglomerate ; the bedding planes of the 

 sandstone are oblique to the bedding planes of the beds above and 

 below. Succeeding the sandstone above is 6 in. of sandstones in very 

 thin layers, with lignitic seams along its horizontal but wavy bedding 

 planes. The above is overlain by 4 in. of conglomerate, followed by 

 1 in. of sandstone with oblique bedding planes. Overlying this layer 

 is a thin layer of sandstone in which the bedding planes are horizontal. 

 The remainder of the stratum is made up of sandstone with the bed- 

 ding planes as follows : 1 ft. oblique ; then 3 in. horizontal ; then 2 ft. ob- 

 lique ; and finally 3 in. horizontal. The stratum furnished in one place 

 the trunk of a large fossil tree and a large number of fossil cycads. 

 Fragments of fossil wood were found in a number of places, but cycads 

 in only the one. Fragments of a hollow-boned dinosaur were found 

 in one place in the horizon. 



19. Drab-colored clay 30 ft. to 40 ft. 



This stratum contains the bones of the large dinosaur, Bronto- 



saurus. Otherwise it appears to be unfossiliferous. 



20. Fissile, brownish sandstone 4 ft. to 5 ft. 



No fossils were found in this sandstone, and the most characteristic 



feature about it is its uniformly brown color. It seems to be moder- 

 ately persistent, as its occurrence in many places in the hills was no- 

 ticed. 



21. Bluish-green clay containing very small concretions 30 ft. 



In the bone quarries of this horizon, which furnished species of 



Brontosaurus, Morosaurus, and Diplodocus, were found specimens of 

 {Pla?i07'his) veternus and Valvata leei. This is the lowest horizon at 

 which any of these non-marine invertebrates were noticed. It is 

 probable that they will be found lower down, as the dinosaurs occur 

 much lower. 



