Author: William J. Gregg
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 36
Book Description
Structural Geology of Parautochthonous and Allochthonous Terranes of the Penokean Orogeny in Upper Michigan
Author: William J. Gregg
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 36
Book Description
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 36
Book Description
Structural Geology of Parautochthonous and Allochthonous Terranes of the Penokean Orogeny in Upper Michigan
Author: William J. Gregg
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 28
Book Description
Structural Geology of Parautochthonous and Allochthonous Terranes of the Penokean Orogeny in Upper Michigan
Author: William J. Gregg
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 28
Book Description
Contributions to Precambrian Geology of Lake Superieur Region
Author: Etats-Unis. Geological Survey
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
U.S. Geological Survey Bulletin
U.S. Geological Survey Bulletin
Author: Paul Kibler Sims
Publisher:
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.
Publisher:
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.
Archean and Early Proterozoic Tectonic Framework of North-Central United States and Adjacent Canada
Author: Paul Kibler Sims
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 20
Book Description
U.S. Geological Survey Bulletin
Monthly Catalog of United States Government Publications
Monthly Catalogue, United States Public Documents
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 952
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 952
Book Description