4 
No. 5. 
INTRODUCTION. 
Soft white limestone, with Nautilus Dekayi, Baculites ovatus, Scaphites Conradi, Gryphxa 
vesicularis, Exogyra costata, etc.; 6 feet. 
Dark limestone, with obscure casts of shells; 4 feet. 
In Texas the formations consist mainly of compact limestone. Dr. Shumard’ gives 
the following section :— 
Novel: 
EARLIER CRETACEOUS— 
Marly clay, with Ammonites Swallovii, A. Meekianus, Ancyloceras annulatus, Scaphites 
vermiculus, Baculites gracilis, Inoceramus capulus, etc.; 150 feet in thickness. 
Arenaceous beds, with Ostrea bellarugosa, remains of fishes, etc.; 80 feet. 
. Caprotina limestone, with Orbitolina Texana, ete. ; 55 feet. 
Blue marl, with Inoceramus problematicus, etc. ; 50 feet. 
. Washita limestone, with Gryphea Pitcheri, Inoceramus problematicus, Hamites Fremonti, 
etc.; 100 to 120 feet. 
Indurated blue marl, with Hxogyra arietina, etc. ; 60 feet. 
LATER CRETACEOUS— 
. Austin limestone, with Gryphea vesicularis, Exogyra costata, Nautilus Dekayt, Baculites 
anceps, remains of fishes, etc.; 100 to 120 feet. 
Comanche Peak Group, with Exogyra Texana, Gryphzxa Pitcheri, Cardium multistriatum, 
Ammonites Pedernalis, Heleraster Texanus, Diadema Texana, ete. ; 300 to 400 feet. 
Caprina limestone, with undetermined species of shells; 60 feet. 
Other localities? of Cretaceous formations of the different subdivisions are as 
follows :— 
No. 
1. At different points in New Mexico. (Newberry.$ 
No. 2. 
On the north branch of the Saskatchewan, west of Fort 4 la Corne, lat. 54° N., in New 
Mexico. (Meek.) 
3. Over the region from Kansas through Arkansas to Texas; Pyramid Mountain, N. Mexico. 
. In British America, on the Saskatchewan and Assiniboine ; on Vancouver Island; Sucia 
Islands, in the Gulf of Georgia. 
. At Deer Creek, on the North Platte, and not identified south of this. (Meek and Hayden.) 
1 Transac. Acad. of Sciences of St. Louis, I, 583. 
2 Dana, Manual of Geology, 470. 
