536 KANSAS CITY REVIEW OF SCIENCE. 



were therefore Jurassic. Other American geologists assign these rocks to the 

 Cretaceous. 



Marcon places the rocks of Pueblo Creek and Zuni River in the Trias. 

 Henry Engelmann, in Simpson's Report, 1859, refers to Meek and Hayden's 

 statement of Jurassic occurring in the Black Hills, and says that he observed in- 

 dications of similar rocks in the Uinta and Wahsatch. Engelmann relates that 

 he obtained a few Jurassic fossils on North Platte between the Red Euttes and 

 the mountains. These beds were overlaid by certain beds of a purple and gray 

 crypsTerous sandstone which he called Trias. On the east fork of Weber River 

 he obtained Peden Ostrea and Pentacrinus which he referred to the Jura. This 

 volume contains one plate and descriptions of Jurassic fossils by Prof. Meek, em- 

 bracing Dintalium, subquadrata, Gryphc?a calceola, CaJnptotfietss h-sllis fnaia, Belem- 

 nites, Ostrea Evgelmanni, and Pentacrinus. These fossils were obtained from 

 Red Butte and the west side of the Wasatch, and Mr. Meek says they are clearly 

 Jurassic. 



In 1858 Prof. Meek published in Proc. Ac. Nat. Sc, Philadelphia, sections 

 on Upper Missouri and says that certain beds at the mouth of Judith River lying 

 near the base may be older than the Cretaceous. 



Prof. Jno. S. Newberry in Ives' Survey of Colorado River speaks of the oc- 

 currence of Jurassic and Triassic in Abajo Mountains in southeastern Utah. 

 Newberry (1859) in Geology from New Mexico to the Grand and the Green, 

 referring to the formation around Santa Fe gives 1500 feet of red beds, noted 

 also at Pecos and San Jose with obscure forms of Walchia and a Calamite. 



At Abiquin, New Mexico, Dr. Newberry discovered in the roof-shales 

 thousands of impressions chiefly of cycadeous plants clearly referable to Jurassic, 

 and three plates are devoted to the figures. Dr. Newberry also speaks of Triassic 

 and Jurassic in the Grand Canon of the Colorado, and also figures certain Triassic 

 fossils from Los Broncos, Sonora. 



McFarlane in his Geological Railway Guide, Art. Colorado — Hayden, says 

 Trias or Red Beds occur at Morrison Station sixteen miles from Denver and also 

 at Golden. .In the same book. Art. Wyoming, A. Hague speaks of Jurassic and 

 Triassic at Red Buttes, with Jurassic at Como and Triassic at Iron Point and 

 Humboldt, Nevada. 



Messrs. Meek and Hayden, in Palaeontology of Upper Missouri, 1864, de- 

 vote sixty-two pages to descriptions of Jurassic fossils with three illustrative plates. 

 Among the fossils Pantacrinus Astericiis was obtained from opposite Red Buttes 

 and North Platte, and other fossils from Wind River Valley, southwest of Black 

 Hills and Big Horn Mountains. In Geological Report of the Yellowstone and 

 Missouri Rivers, 1859, by F. V. Hayden, of Capt. Raynolds' Exploration, pub- 

 lished in 1869, Prof. Hayden says that certain fossils collected, at the head of 

 Wind River valley, Lat. 43° 30', Long. 110° W., also from Big Horn Moun- 

 tains, the Black Hills and Red Buttes, present clear affinities to the Jurassic of 

 the Old World. This pamphlet of Hayden's also contains his system of nomen- 

 clature of the Cretaceous as well as a geological map of head waters of the Mis- 



