156 
Mesozoic Series of New Mexico. — Marcou. 
into the New Red Sandstone series (Dias and Trias systems) ; 
and after traveling westward for hundreds of miles I met first 
the Neocomian, with a well characterized fauna at Cometcreek 
(99° longitude and 35° 50' of latitude) resting uncomformahly 
upon the middle part (Muschelkalk) of the Triassic system: 
and secondlythe Jurassic system lying in concordance of stratifi- 
cation over the upper part (Keuper) of the Trias at Encamp- 
ment creek on the Llano Estacado, but without fossils, and 
farther on at Pyramid mount, Tucumcari and Plaza larga 
area (longitude 101° to 104° and latitude 35° 10') with a 
fauna of Jurassic Ostrace(E containing the most characteristic 
European forms. On reaching the settlements in New Mexico 
I found at Galisteo the upper Cretaceous or white chalk for- 
mation of Europe characterized by a genus of fossil fish, 
PtychodiiH^ confined until then to the white chalk of England 
and France; and besides I recognized west of Galisteo, a Cre- 
taceous area which extends across the Rio Grande del Norte, 
forming all the mesa between Albuquerque and the Rio 
Puerco. 
I will present my stratigraphical observations and 
classification of the strata of New Mexico, the Pan Handle of 
Texas and the Indian territory, as I made it in 1853, in the 
following detailed table. 
I.— Table showing the order of succession and classification of the Mesozoic series 
along the 35th parallel of latitude, between Delaware ridge^ Indian territory, Chick- 
asaw nation), Zuni, (New Mexico), and San Francisco mountain, (Arizona), 1853. 
Upper Cretaceous 
or 
White chalk. 
(New Mexico.) 
a. Gray sandy marls, with Plychodu» tvhipplei, Ammonites, 
Tnoceramus, Ostrea congesta; north of Galisteo, lying in 
discordance of stratification over or against the white 
and yellow Jurassic sandstone. 
b. Black marls and sandy limestone with Inoceramus 
Le^onxi; Ravines of the Rio Galisteo. 
c. White sandstone, with Ammonites iwvi- meiicani, 
BacuHtes and Inoceramw. It forms the whole mesa 
between Albuquerque and the Rio Puerco. 
« 
Break. 
11 
O 
5 
Middle Cretaceous 
or 
Green sand. 
Greenish marly limestone, with scales of fossil) Unknown 
fishes. Seen only at Shawnee village, at the junc-> in New 
tion of Little river with the Canadian river. > Mexico. 
Lower Cretaceous 
or 
Neocomian. 
(Indian Territory.) 
a. Pale blue m.irl of Fort Washita and near"! 
Preston (Texas), with Gryphxa sinuata | TT„i-nnwn 
var. Americana, Exogyra tezana, Ostrea cari- | '-"'^"""u 
nata, Holaster comanchen, Ammonites peruvi- J- j^ 
anus, Am. belknapi, Am. shumardi. etc. Mpxioo 
b. Yellow Gryphites limestone of Comet creek "'c-'-'^"- 
and Fort Wasliita with Gryphxa pitcheri. ) 
Break. 
I. White limestone, similar co the white limestone of the 
White .Jura of Wurtenberg and the Jura. It forms the 
summit of Pyramid mount, Tucumcari area. No fossil 
collected. 2 feet. 
