616 W. T. LEE STRATIGRAPHY OF COAL FIELDS OF NEW MEXICO 



through the upper half of the shale^, which is perfectly exposed in a steep 

 barren slope. The first lot (7200) of the following list is from the upper 

 100 feet, and the second lot (7201) is from a horizon 300 to 500 feet 

 below the top of the shale. 



Shells collected fro7n the Shale Slope aJ)Out half a Mile North of Dulce, New 



Mexico 



United States Geological Survey locality numbers (7200) (7201) 



Ostrea pellucida M. & H. ? X 



" sp X 



Anomia sp X 



Syncyclonema rigida H. & M X 



sp X 



Inoceramus sagensis Owen X X 



" oJ)longus Meek? X 



Modiola sp X 



Cardium speciosum M. & H X 



Pinna lakesi White? X 



Trigonarca (Breviarca) exigua M. & H X 



Lucina occidentalis (Morton) X 



Thetis circularis M. & H X X 



Pyrifusus sp X 



Tellina sp X 



Mactraf sp X 



Liopistha undata M. & H X 



Lunatia sp X 



Fususf si^ X X 



Anysomyon patelliformis M. & H X 



Actwon sp X X 



Haminea sp X 



Baculites ovatus Say X 



" compressus Say X 



Ancyloceras sp X 



Scaphites nodosus Owen X 



Placenticeras whitfieldi Hyatt X X 



" intercalare M. & H X 



Fish scales X 



There is above the Lewis shale a series of rocks not less than 1,000 

 feet thick, somewhat shaly in the lower part, where a thin bed of coal 

 occurs, but consisting principally of massive sandstone more or less con- 

 glomeratic throughout. Apparently some of the older geologists referred 

 this whole series to the Laramie. Others referred some of it to the Lara- 

 mie and some to the Tertiary. Schrader (100) described the lower or 

 coal-bearing portion as "Laramie," and proved, by tracing the beds, that 

 it is identical with the "Laramie" of the Durango region. The following 



