Stratigraphy of the Coal Fields of Northern Central New Mexico |
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Anomia sp Baculites base Benton Cabezon carbonaceous Cardium sp Cephalopod zone Cerrillos coal field Cerrillos field coal beds coal measures coal-bearing rocks coarse-grained collected Colorado concretions conglomerate conglomeratic contains correlated Cretaceous Dakota sandstone Denver Denver Basin Denver formation described Dulce Durango east farther fauna feet thick Ficus flora fossil plants fossiliferous Fox Hills Galisteo sandstone Gastropod Gastropod zone gray Hagan field Heer Herrick and Johnson horizon Hyatt igneous inches Inoceramus Inoceramus sp Laramie Lesq Lewis shale lignite limestone lithologic lower Madrid Mancos shale marine massive Meek Mesaverde Mesaverde formation Mexico miles Monero Montana Niobrara occur Omera Ostrea sp paper Pierre Placenticeras Raton Mesa referred Report Rio Puerco field San Juan Basin Sandstone and shale sandy Scaphites shaly shells species Stanton stratigraphic Tertiary thin Tijeras field Tres Hermanos sandstone Turritella U. S. G. S. locality unconformity United States Geological upper Washington writer