DESCRIPTIVE DETAILS : HAGAN FIELD 



635 



Feet Inches 



Covered. (Thin beds of coal occur at this horizon 



l^ mile farther north) 82 



Sandstone, massive, friable, light gray 20 



Not well exposed. There are several small ridges 

 formed by the outcropping of sandstone layers 

 m which are concretions of chocolate-colored 

 sandstones and fossiliferous limestones ; con- 

 tains Ostrca elegantula Newberry; Ostrea sp. ; 

 Anomia sp. ; Syncyclonema sp. ; Modiola sp. ; 

 Inoceramus harahini Morton; Inoceramus sp. ; 

 Lithophacjus sp. ; Leda sp. ; Cucullwa sp. ; 

 Cardium sp. ; Legnmen sp. related to L. planu- 

 latum Conrad; Liopistha iindata M. and H. ; 

 Tellina sp. ; Mactra sp. related to M. formosa 

 M. and H. ; Mactra sp. related to M. gracilis 

 M. and H. ; Mactra sp. ; Tiirritella sp. ; Gyrodes 

 sp. ; Lunatia sp. ; Pterocerella sp. ; Fasciolaria ? 

 sp. ; Tiirris sp. ; Pyrifusiis ? sp. ; Pyropsis ? sp. ; 

 Volutomorplia novimeaicana Herrick and John- 

 son ; Actccoii sp. ; Placenticeras tvhit field i 

 Hyatt; Placenticeras intercalare M. and H, ; 

 Placenticeras sancarlosense Hyatt ; Placenti- 

 ceras planum Hyatt ; Scaphites sp. related to 

 S. hippocrepis De Kay ; Lamna sp. (shark's 

 teeth) ; fish vertebrjB (U. S. G. S. localities 



Nos. 6778 and 7172) 220 



Shale and sandstone not well exposed 415 



Sandstone with a subordinate amount of shale. 

 The sandstone occurs in large lenticular masses 

 and contains irregular masses of brownish yel- 

 low to chocolate-colored, fossiliferous limestone. 

 Gastropods are most numerous near the base. 

 Contains Ostrea sp. related to O. lugubris Con- 

 rad; Ostrea (Alectryonia) sp. ; Inoceramus 

 • harahini Morton ; Inoceramus sp. related to 

 /. acuteplicatus Stanton ; Pinna sp. ; Cucullcea 

 sp. ; Cardium sp. ; Crassatellites shumardi 

 Meek ; Cypri/ineria sp. ; Tellina sp. ; Turritella 

 sp. ; Anchura ? sp. ; Gyrodes sp. ; Turris sp. ; 

 Pyrifiisus ? sp. ; Volutomorplia novimexicana 

 Herrick and Johnson ; Pyropsis ? sp. ; Odonto- 

 fusus ? sp. ; Volutoderma ? sp. ; several undeter- 

 mined gastropod genera ; Nautilus dekayi Mor- 

 ton?; Placenticeras sancarlosense Hyatt; Pla- 

 centiceras intercalare M. and H. ; Lamna sp. 

 (shark's teeth) fish vertebrae (U. S. G. S. 



localities Nos. 6779 and 7175) 265 



XLV — Bull. Geol. See. Am., Vol. 23, 1911 



Mesaverde 



