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3 edition of Revised Keweenawan subsurface stratigraphy, southeastern Minnesota found in the catalog.

Revised Keweenawan subsurface stratigraphy, southeastern Minnesota

G. B. Morey

Revised Keweenawan subsurface stratigraphy, southeastern Minnesota

by G. B. Morey

  • 375 Want to read
  • 33 Currently reading

Published by University of Minnesota in Saint Paul .
Written in English

    Places:
  • Minnesota.
    • Subjects:
    • Geology, Stratigraphic -- Precambrian.,
    • Geology -- Minnesota.

    • Edition Notes

      StatementG. B. Morey.
      SeriesReport of investigations - Minnesota Geological Survey ; 16, Report of investigations (Minnesota Geological Survey) ;, 16.
      Classifications
      LC ClassificationsQE127 .A25. no. 16, QE653 .A25. no. 16
      The Physical Object
      Paginationiv, 67 p. :
      Number of Pages67
      ID Numbers
      Open LibraryOL4377250M
      LC Control Number78620894

      Subsurface correlative referred to as Red Clastic series. Underlies unconsolidated Pleistocene clay and fine sand. Overlies Middle Precambrian Thomson Formation of Animikie Group, which is intruded by middle Keweenawan age (1, Ma) dikes and sills of diabasic gabbro. Age is Late Precambrian (late Keweenawan), [based on stratigraphic relations]. Another major issue with regard to the subsurface is the stratigraphic position and origin of tripolitic chert development. Previous outcrop studies within the Mississippian outcrop belt, mud logs, and well log correlations have been utilized to facilitate the application of sequence stratigraphy to the subsurface .

      subsurface stratigraphic units in relation to oil an d gas production; Armstrong and Carter, in prep) and will be outlined briefly in this field guide. The acqui sition of more than forty cores. Name used in subsurface in southeastern MT in the Montana-Dakota Utilities Co. No. 1 Northern Pacific Railroad Co. well, sec. 17, T4N, R62E, Fallon Co, MT in Williston basin for white cross-bedded sandstone, containing some dolomite near the middle at depths of 5, to 5, ft. Overlain by Opeche shale; underlain by Amsden formation.

      Environmental Sequence Stratigraphy (ESSEnvironmental Sequence Stratigraphy (ESS) Process. Borehole Log Borehole Log toto Graphic Grainsize Log Graphic Grainsize Log. Grain-size increasing. Clay Gravel. 0. Cross Section. Map. Uncon Depth (Ft - MSL) 1. Determine depositionaldepositional environment. which is the. 4. Chart showing stratigraphic distribution of Pleistocene mammals in Nebraska. 5. Map showing distribution of glacial striations on Sioux quartzite in southeastern South Dakota. 6. Well logs believed to record two or more substages of the Wisconsin. 7. Map showing elements of the inferred prediversion drainage system in South Dakota. Page.


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Revised Keweenawan subsurface stratigraphy, southeastern Minnesota by G. B. Morey Download PDF EPUB FB2

REVISED KEWEENAWAN SUBSURFACE STRATIGRAPHY, SOUTHEASTERN MINNESOTA by G. MOREY ABSTRACT The Midcontinent Gravity High is the major tectonic feature of the northern midcontinent region.

Numerous geophysical surveys have shown that this structure is mainly a sequence of basaltic lava flows which form. Revised Keweenawan subsurface stratigraphy, southeastern Minnesota (Report of investigations - Minnesota Geological Survey ; 16) [G.

B Morey] on *FREE* shipping on qualifying offers. Get this from a library. Revised Keweenawan subsurface stratigraphy, southeastern Minnesota. [G B Morey]. Morey, G.B.,Revised Keweenawan Subsurface Stratigraphy, Southeastern Minnesota, Minnesota: Minnesota Geological Survey Report of Investigati 67 by: 3.

RI Revised Keweenawan Subsurface Stratigraphy, Southeastern Minnesota. By G.B. Morey. Abstract. The Midcontinent Gravity High is the major tectonic feature of the northern midcontinent region. Numerous geophysical surveys have shown that this structure is mainly a sequence of basaltic lava flows which form steep-sided, en echelon blocks, on Author: G.B.

Morey. The subsurface stratigraphy of the late Precambrian (Upper Keweenawan) bedrock in southeastern Minnesota has been studied in detail by Meyers (), Hubbard (), Craddock (a, b), and Morey ().

The Hinckley, Fond du Lac, and Solar Church Formations comprise the Upper Keweenawan bedrock in southeastern Minnesota. Fig. 1 is a geologic map of southeastern Nebraska showing the main Precambrian subsurface units and the lithology in the various drill holes that encountered Keweenawan rock.

The regional distribution of Kew- eenawan basalt and sedimentary rock units is based on an unpublished large-scale aeromagnetic anomaly map and available basement hole data. In eastern Minnesota, three formations are present—the feldspathic-lithic Solor Church Formation (to m thick), the feldspathic Fond du Lac Formation (– m thick), and the quartzose Hinckley Sandstone (to m thick).

The Solor Church, found only in the subsurface, was deposited southwest of Lake Superior along the rift zone. Midcontinent Rift system Regional Keweenawan stratigraphy Rock units associated with the Midcontinent Rift system are exposed only in the Lake Supe- rior region (Fig.

Lithologic units associated with the Midcontinent Rift system are known informally as "Keweenawan" in the Lake Supe- rior area (Morey and Green, ; Green, ; Dickas, ). Tectonophysics, 94 () Elsevier Science Publishers B.V., Amsterdam - Printed in The Netherlands GEOLOGIC AND GEOCHEMICAL EVIDENCE FOR THE NATURE AND DEVELOPMENT OF THE MIDDLE PROTEROZOIC (KEWEENAWAN) MIDCONTINENT RIFT OF NORTH AMERICA JOHN C.

GREEN Geology Department, University of Minnesota, Duluth, MN (U.S.A.) (Revised. Regional stratigraphy and subsurface geology of Cenozoic deposits, Gulf Coastal Plain, South-Central United States /by R.L.

Hosman. (Regional aquifer-system analysis Gulf coastal plain) (U.S. Geological Survey professional paper ; G) Includes bibliographical references.

: I G 1. Geology, Stratigraphic Cenozoic. A rhyolite from the subsurface in southeastern Minnesota has yielded a U–Pb zircon age of Ma (Zartman et al., ). Basalt flows that comprise the so-called Lakeshore Traps in the lower part of the Oronto Group on the Keweenawan Peninsula of Michigan yielded a U–Pb zircon age of ± Ma (Davis and Paces, ).

STRATIGRAPHY AND TECTONIC SETTING Late Archean rocks Archean rocks are exposed only in the east -central part of the map area. They consist of Late Archean foliated and layered granitic rocks (Cannon, ).

Archean rocks are extensive in the subsurface throughout the map area and form the basement on which Early and Middle.

Drill core samples of 42 Precambrian sedimentary, igneous, and metamorphic rocks were analyzed by heating under partial vacuum at °C and at °C to release hydrocarbons and other volatile products. The core samples yielded methane in amounts ranging from traces to 3 microliters per gram, but averaged much less.

By way of comparison, samples of Middle Devonian Marcellus black shale, from. In southeast Minnesota, springs are outlets in a conduit flow system in both carbonate and siliciclastic bedrock formations. They provide baseflow for streams and are a critical source of cold, relatively constant temperature water for trout.

OFR, Stratigraphic Positions of Springs in Southeast Minnesota. "late-wisconsin stratigraphy and glacial history of southwestern st.

louis county, minnesota" dokken, kayo l.,m.s. thesis, (advisor: darby) p." ichnofossils of the carbonate platteville formation (middle ordovician) in southeastern minnesota" felger, tracey j.,m.s. thesis, (advisor: holst) p. "the geology of the skinner.

The Potato River intrusion is a Keweenawan ( Ma) mafic pluton emplaced in Keweenawan volcanics and earlier Proterozoic metasedimentary rocks along the southeastern. Audio Books & Poetry Community Audio Computers, Technology and Science Music, Full text of "Illinoian and Wisconsinan stratigraphy and environments in northern Illinois: the Altonian revised.

Lower Keweenawan Sediments of the Lake 45 Superior Region D. Myers The Sedimentology and Tectonic Significance 54 of the Bayfield Group, Wisconsin C. Merey Revised Keweenawan Subsurface Stratigraphy, 50 Southeastern Minnesota H.

Halls Shallow Structure and Stratigraphy of the The Solor Church Formation of Late Keweenawan (Late Precambrian) age occurs in the subsurface of southeastern Minnesota where it comprises an integral part of the St.

Croix horst, the major structure that underlies the northern part of the Midcontinent Gravity High. MINNESOTA by John C. Green ABSTRACT In an approximately square-mile area east of Ely in the center of the Vermilion district, three major stratigraphic units are mapped.

The oldest unit, the Ely Greenstone, contains at le feet of dominantly metabasaltic rocks, and the base is not exposed.subsurface in southeastern Minnesota. These rocks are referred to as the Red Clastic Series (Meinzer, Hall and Fuller, ).

The Minnesota Geological Survey prefers to consider these units as Keweenawan for the following reasons: (1) The Red Clastic Series and its surface equivalents lack worm burrows and other evidences of.Stratigraphy is the science of understanding the variations in the successively layered character of Rocks and their composition.

These Rocks may be sedimentary, volcanic, metamorphic or igneous. The layering of sedimentary Rocks is expressed as sets of simple to complex sedimentary geometries, and a wide variety of different sedimentary facies.