26o STANTON 



rocks are designated as "Fox Hills(?) " in Douglass' latest paper, but 

 in his first description of this section that term was made to include 

 the lower members which he now refers to the Laramie and which 

 "contain in almost every good exposure bones of dinosaurs, such as 

 Triceratops and probably Trachodon. " Some additional paleontologic 

 evidence has been obtained from beds beneath the horizon of these 

 dinosaurs. About 2^ miles northwest of George Moore's (formerly 

 McClatchey's) ranch in sec. 23, T. 6 N., R. 16 E., the following suc- 

 cession was observed in ascending order: 



Feet. 



1. Valley underlain by Bearpaw shale not well exposed. 



2. Light colored, friable, rather heavy bedded sandstone with a 



fossiliferous band at the top yielding Ostrea glabra, Anomia, 

 Corbicula, Melania wyomingensis? etc 30 to 40 



3. Dark shales and sandstones with nodules containing Ntictda 



planiniarginata, Leda (Yoldia?) evansi, Macira warrenana, 



Thracia {?), Lunatia, and other marine Cretaceous fossils. . 100 



4. Light-colored sandstone 30 



5. Soft sandstones and shales with bands of hard brown sandstone. 



One of these at the top contains many fossil plants 50 



The plants were examined by F. H. Knowlton in 1903 and were 

 then considered possibly older than Montana, though the evidence was 

 unsatisfactory. Doctor Kjiowlton has recently again examined these 

 plants and has pronounced them Livingston.^^ 



This plant horizon is on the top of the ridge formed by the rocks 

 of Douglass' "Fox Hills (?) " which here dips 23° southerly. Some- 

 what more than a mile along the strike in section 16 of the same town- 

 ship bones and teeth of Triceratops and other dinosaurs were collected 

 at the southern base of the ridge not more than 150 or 200 feet above 

 the plant bed. 



A few fresh-water invertebrates have been collected from beds near 

 the dinosaur horizon. These include 



Unio hrachyopistlms White 

 Unio reliisoides Whitfield? 

 Unio sp. 



Campcloma? sp. 

 Lhnnaa? sp. 



" Proc. Wash. Acad. Sci., Vol. XI, No. 3, 1909, p. 194, 



