SECTION OF CRETACEOUS ROCKS 



587 



Feet In, Feet In. 



"Laramie" ' 



sp. ; Viviparus sp. ( U. S. G. S. 

 locality No. 6064) 43 feet above the 

 base and fossil plants at the base 



Shale, containing both fresh water and 

 brackish water invertebrates as fol- 

 lows : Uiiio hrachyopisthtis White ; 

 Unio holmesianus White; U7iio, 2 un- 

 described (?) species; Sphcerium sp. ; 

 Martesia ? sp. ; Viviparus sp. ; Cowi- 

 peloma ? sp. ; Tulotoma thompsoni 

 White ; Ostrea sp. ; Cordicnla sp., re- 

 lated to C. subelliptica M. & H, ; Cor- 

 hicula sp. ; Corhula sp. ; Melania sp. ; 

 (U. S. G. S. locality Nos. 6071, 6072, 

 and 6074), and fossil plants Viburnum 

 marginatum Lesq. ? (U. S. G. S. 



locality No. 5454) 



Coal bed "B" 



Shale and thin sandstone, containing, 15 

 feet from the top, Ostrea sp. ; Anomia 

 sp. ; Modiola laticostata White ; Cor- 

 hula suMrigonalis M. & H.? (U. S. 

 G. S. locality No. 6065) ; 20 feet from 

 the base are the fossil plants Sequoia 

 redchenhachi (Gein.) Heer ; Quercus 

 sp,, and at the base both shells and 

 plants, Anomia sp. ; Gorhula suMri- 

 gonalis M. & H.?; Cypris 1 sp. ; Me- 

 lania sp. (U. S. G. S. locality No. 

 6068), and BracliypUyllum macro- 

 carpum, Newb. ; Geinitzia formosa 

 Heer; Sequoia reichenhachi (Gein.) 

 Heer (U. S. G. S. locality No. 5451). 

 Coal bed "A" 



Shale, dark and drab .• 



150 



10 

 12 



50 

 3 

 4 



1,090 



XLll — fiuLL, Geol. See. Am., Vol. 23, 1911 



