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Contributions to Economic Geology (Short Papers and Preliminary Reports), 1911: Part 1 -- Metals and Nonmetals Except Fuels
From introduction: The growing economic importance of the Carrville district, Trinity County, California merits notice, and it is hoped that this brief report will direct attention toward it, to the end that mining in general may be benefited.
Date:
1913
Creator:
Lindgren, Waldemar
System:
The UNT Digital Library
Geology and Ore Deposits of Lemhi County, Idaho
From introduction: The present report embodies the results of reconnaissance studies in the nineteen mining districts of Lemhi County, Idaho.
Date:
1913
Creator:
Umpleby, Joseph B.
System:
The UNT Digital Library
Geology and Ore Deposits of the San Francisco and Adjacent Districts, Utah
From introduction: This report describes the mapping of the surface geology of the San Francisco and adjacent districts in Utah.
Date:
1913
Creator:
Butler, B. S.
System:
The UNT Digital Library
Recurrent Tropidoleptus Zones of the Upper Devonian in New York
From introduction: This report describes the four zones, three well-marked and one subordinate, in the Upper Devonian rocks, each of which contained several species that are common in the typical Hamilton formation of the Cayuga Lake section and are associated with very few of the really characteristic species of the faunas normal to the formations in which they are found.
Date:
1913
Creator:
Williams, Henry Shaler
System:
The UNT Digital Library
The San Franciscan Volcanic Field, Arizona
Introduction: This report deals primarily with the volcanic phenomena of the region as determined in the field and laboratory.
Date:
1913
Creator:
Robinson, Henry Hollister
System:
The UNT Digital Library