Report of Investigations - Minnesota Geological Survey

Report of Investigations - Minnesota Geological Survey PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 462

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Water-resources Investigations Report

Water-resources Investigations Report PDF Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 256

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Geological Survey Professional Paper

Geological Survey Professional Paper PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 452

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Groundwater-surface Water Interaction

Groundwater-surface Water Interaction PDF Author: Corinna Abesser
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 228

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Selected papers from a symposium on A new Focus on Integrated Analysis of Groundwater-Surface Water Systems, held during the International Union of Geodesy and Geophysics XXIV General Assembly in Perugia, Italy, 11-13 July 2007.

Petrography and Correlation of Precambrian Clastic Sedimentary Rocks Associated with the Midcontinent Rift System

Petrography and Correlation of Precambrian Clastic Sedimentary Rocks Associated with the Midcontinent Rift System PDF Author: Pieter Berendsen
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 28

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Regional Aquifer-System Analysis Program of the U.S. Geological Survey, Summary of Projects, 1978-84

Regional Aquifer-System Analysis Program of the U.S. Geological Survey, Summary of Projects, 1978-84 PDF Author: Ren Jen Sun
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 284

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U.S. Geological Survey Professional Paper

U.S. Geological Survey Professional Paper PDF Author:
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ISBN:
Category :
Languages : en
Pages : 360

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Middle Proterozoic to Cambrian rifting, central North America

Middle Proterozoic to Cambrian rifting, central North America PDF Author: Richard W. Ojakangas
Publisher: Geological Society of America
ISBN: 0813723124
Category : Science
Languages : en
Pages : 331

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Based on the Tenth International Basement Tectonics Conference held at the University of Minnesota-Duluth in August 1992, this volume contains 19 papers, 13 of which focus on the Middle Proterozoic Midcontinent Rift. An introductory essay discussing the Middle Proterozoic to Cambrian rifting in central North America is followed by contributions addressing topics including the Midcontinent Rift in Michigan and Minnesota, the Port Coldwell veins of northern Ontario, and petrography and sedimentation in the western Lake Superior region. The last five papers deal with the pre-Mount Simon basins of Ohio, the English Graben and the newly proposed East Continent Rift Complex, the Reelfoot Rift/Rough Creek Graben in the evolution of the Illinois Basin, and the A-type sheet granites in the Oklahoma Aulacogen of Cambrian age. Bandw illustrations. Annotation copyrighted by Book News, Inc., Portland, OR

U.S. Geological Survey Bulletin

U.S. Geological Survey Bulletin PDF Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 372

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U.S. Geological Survey Bulletin

U.S. Geological Survey Bulletin PDF Author: Paul Kibler Sims
Publisher:
ISBN:
Category : Faults (Geology)
Languages : en
Pages : 268

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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.

Water-quality Assessment of Part of the Upper Mississippi River Basin, Minnesota and Wisconsin

Water-quality Assessment of Part of the Upper Mississippi River Basin, Minnesota and Wisconsin PDF Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 72

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