18T5.] 4b L [Stevenson. 



coal and shale, twelve feet thick, resting almost directly upon Triassic 

 marls, and underneath a yellowish sandstone filled with dicotyledonous 

 leaves. At Camp 96, and at Oraybe, he found above this bed, green and 

 blue shales two hundred and fifty feet thick. Toward the base this series 

 contains Ammonites percai-matus, Inoceramus Crispii and GrypJuea navia, 

 while toward the top it shows Pinna (?) lingula, GrypluBa Pitcher i, with 

 beds of lignite, above which are impressions of Platanus, Alnus, Quercus, 

 etc., along with SpJienopteris. From the Moqui country eastward for 

 about twenty miles, these beds are continuously in sight ; but, at length, 

 they under-run a mass of Tertiary rocks, which Dr. Newberry thinks 

 may prove equivalent to the White River Group of the Upper Missouri 

 Region. At Camp 100, beyond the eastern border of this Tertiary basin, 

 a group of lignites and brown sandstones is found between the Triassic 

 and Cretaceous, but it is not persistent. Near Fort Defiance, the Lower 

 Cretaceous Series is seen resting on the Triassic and consists of "green 

 and dove-colored shales, brown and greenish sandstones, brownish-yellow 

 concretionary limestone containing Oryplicea Pitclieri, and beds of lig- 

 nite." The section here is about the same as at Oraybe. At Campbell's 

 Pass, the section is as follows : 



1. Cretaceous sandstones, shales, and lignites 700 ft. 



2 and 3. Marl Series. , "i 750 ft. 



V T^riSiSsic 



4, 5, and 6. Salt Group ) 520 ft. 



7. Carboniferous limestone. 

 The shales in No. 1 contain Gryphcea Pitclieri. 



The same section was traced by Dr. Newberry directly to the Rio 

 Grande, and at Galisteo Creek, not far from Santa Fe, the section is : 



1. Cretaceous sandstones and shales with beds of lignites. 



2. Red and white marls, all somewhat indurated, with silicified wood. 



3. Soft red sandstones of the Salt Group. 



Above these are the Santa Fe marls which rest unconformably upon 

 the Cretaceous. 



Dr. J. L. Leconte's notes* give few details respecting this region, but 

 they serve to confirm the earlier observations by Dr. Newberry. 



In 1869, Dr. Hayden visited Santa Fe and its vicinity. His notes are 

 given in his report for that year. The section obtained by him at Santa 

 Fe is certainly eccentric. On Galisteo Creek, he identifies No. 2 and 4 

 of the Cretaceous, The remainder of the section is as follows, ascending, 



1. Coal Groitpf-with. abundant impressions of deciduous leaves, resting 

 conformably upon well-marked Cretaceo.ua strata. 



2. The Galisteo Sand Group, consisting of variegated sands and sand- 

 stones, overlying conformably the Coal Group, and concealing it on the 

 east and northeast flank of Placiere Mountain. This group shows pecu- 

 liarities here, not seen in the lignite series elsewhere. The color varies 



* Notes on the Geology of the Smoky Hill Koute. 



