Some Cinnabar Deposits in Western Nevada
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Conchidiuni (2 species).
Favosites cristatus. Pisocrinus sp.
1 The broader features of the geology and their relation to those of the surrounding ter- ritory have been discussed by S. H. Ball in A geologic reconnaissance in southwestern Nevada and eastern California : U. S. - Geol. Survey Bull. 308, 1907.
64 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1915, PART I.
Dr. Kirk adds : This collection is of considerable interest, as it fixes rather definitely the age of the widespread Silurian fauna of the W...estern States. The beds cor- relate approximately with the Fusselman limestone of the El Paso region and the Laketown dolomite of Utah.. On the evidence of the fossils in the present lot it is safe to place the fauna near the top of the Niagaran.
At the base of Bare Mountain a narrow belt of quartzite appears between the dolomite and the upper edge of the piedmont alluvial slope.
The rocks are cut by a number of porphyry dikes. Large pheno- crysts of quartz are prominent constituents of the rock of these dikes.
What to read after Some Cinnabar Deposits in Western Nevada?
You can find similar books in the "Read Also" column, or choose other free books by Adolph Knopf to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Conchidiuni (2 species).
Favosites cristatus. Pisocrinus sp.
1 The broader features of the geology and their relation to those of the surrounding ter- ritory have been discussed by S. H. Ball in A geologic reconnaissance in southwestern Nevada and eastern California : U. S. - Geol. Survey Bull. 308, 1907.
64 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1915, PART I.
Dr. Kirk adds : This collection is of considerable interest, as it fixes rather definitely the age of the widespread Silurian fauna of the W...estern States. The beds cor- relate approximately with the Fusselman limestone of the El Paso region and the Laketown dolomite of Utah.. On the evidence of the fossils in the present lot it is safe to place the fauna near the top of the Niagaran.
At the base of Bare Mountain a narrow belt of quartzite appears between the dolomite and the upper edge of the piedmont alluvial slope.
The rocks are cut by a number of porphyry dikes. Large pheno- crysts of quartz are prominent constituents of the rock of these dikes.
What to read after Some Cinnabar Deposits in Western Nevada?
You can find similar books in the "Read Also" column, or choose other free books by Adolph Knopf to read onlineMoreLess
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