Author: Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 134
Book Description
Geological Survey Professional Paper
Author: Geological Survey Professional Paper
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 216
Book Description
U.S. Geological Survey Professional Paper
Author: Geological Survey Bulletin
Author: Publisher:
ISBN:
Category : Beryl
Languages : en
Pages : 510
Book Description
An appraisal of domestic resources.
Contributions to Economic Geology, 1958
Author: Zirconium and Hafnium in the Southeastern Atlantic States
Author: John Beaver MertiePublisher:
ISBN:
Category : Geology
Languages : en
Pages : 384
Book Description
A report on the zircon resources of Florida and other areas in the Coastal Plain province with a discussion of the origin of this mineral.
U.S. Geological Survey Bulletin
Author: U.S. Geological Survey Bulletin
Author: Gene L. LaBergePublisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 346
Book Description
A reconnaissance study carried out in conjunction with regional geologic mapping.
U.S. Geological Survey Bulletin
Author: Paul Kibler SimsPublisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 268
Book Description
The Early Proterozoic Michigamme Formation of northern Michigan was deposited in the southeastern part of the Animikie basin. The formation conformably overlies the Goodrich Quartzite and comprises three widespread members a lower member of thin-bedded shale, siltstone, and sandstone; the Bijiki Iron-formation Member; and an upper member of tur- biditic graywacke, siltstone, and mudstone and a few local members. The Goodrich Quartzite is interpreted as having been deposited in a tidally influenced shallow marine environ- ment. The lower member of the Michigamme is interpreted as having been deposited in a tidally influenced environment, the iron-formation member as having been deposited below wave base in somewhat deeper water, and the upper member as having been deposited in still deeper water with turbidity currents being a major depositional mechanism. Several lines of evidence including paleocurrents, paleo- geographic setting, and neodymium isotopes suggest that the graywacke of the southern part of the outcrop area was derived from the south (Early Proterozoic Wisconsin magmatic terranes, Archean miniplates, and older Early Proterozoic sedimentary units formed on the continental margin), and that the graywacke in the northern area was derived from an Archean terrane to the north. The tectonic model that best fits the available data is a northward-migrating foreland basin.
Annotated Bibliographies of Mineral Deposits in the Western Hemisphere
Author: John Drew RidgePublisher: Geological Society of America
ISBN: 0813711312
Category : Ore deposits
Languages : en
Pages : 706
Book Description