1 edition of Lake Superior Basin segment of the midcontinent rift system: Lake Superior Basin (Minnesota, Wisconsin, Michigan) July 20-25, 1989. Leaders: Albert B. Dickas [and others] found in the catalog.
Lake Superior Basin segment of the midcontinent rift system: Lake Superior Basin (Minnesota, Wisconsin, Michigan) July 20-25, 1989. Leaders: Albert B. Dickas [and others]
|The Physical Object|
|Number of Pages||62|
CORRELATION OF PRECAMBRIAN ROCKS OF THE UNITED STATES AND MEXICO CORRELATION OF PRECAMBRIAN ROCKS OF THE LAKE SUPERIOR REGION, UNITED STATES By G.B. MOREY1 and W.R. VAN SCHMUS2 ABSTRACT Precambrian rocks in the Lake Superior region underlie parts of Min nesota, Wisconsin, and Michigan, very near the Cited by: Lake Superior, the largest of the Great Lakes of North America, is also the world's largest freshwater lake by surface area, and the third largest freshwater lake by is shared by the Canadian province of Ontario to the north, the U.S. state of Minnesota to the west, and Wisconsin and the Upper Peninsula of Michigan to the south. The farthest north and west of Location: North America. The 10th International Basement Tectonics Conference was conducted on the campus of the University of Minnesota, Duluth, in Duluth, Minnesota, USA, from August I through Aug A total of 78 individuals were in attendance, 47 of which represented the host country, with the remaining
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Fifty-six years ago (), the geology of the “Lake Superior Region”, constituting Excursion C-4, was presented as Guidebook 27 of the XVI International Geological Congress. The field guide for this excursion was prepared by W.O. Hotchkiss of the Michigan College of Mining and Technology (now Michigan Technological University) and sold for 25 cents.
The most prominent of these rifts in terms of extent and effect upon the crust is the Midcontinent Rift system (MCR) which extends in a series of generally linear segments in an arcuate pattern for a distance of over km from southern Kansas to the Lake Superior basin and then south across : William J.
Hinze, David J. Allen, Lawrence W. Braile, John Mariano. Miller, J. () Middle Keweenawan intrusive igneous history, in Dickas, A. (editor), Lake Superior basin Lake Superior Basin segment of the midcontinent rift system: Lake Superior Basin book of the Midcontinent Rift System: Field Trip Guidebook T, 28th International Geological Congress, 13– Google ScholarAuthor: Albert B.
Dickas. The Midcontinent Rift System (MRS) is a Late Mesoproterozoic (∼Ga) sequence of volcanic and sedimentary rocks exposed in the Lake Superior Region of North America.
The data show that the Lake Superior structural basin generally is outlined by the shoreline of the lake. The limbs of the elongated basin are delineated by gravity and magnetic maxima that occur over outcropping and buried mafic volcanic rock.
The basin anomalies at the southwestern and southeastern ends of the lake extend into the midcontinent and mid-Michigan geophysical. The rift basin bends southeast around the Keweenaw Peninsula, widens to about km as it extends into the eastern half of Lake Superior, and exists the lake with its axis in the vicinity of Au Sable Point in Pictured Rocks National Lake Shore, about 50.
The Midcontinent Rift (MCR) of North America comprises a series of basaltic sheets, flows and intrusive rocks emplaced in the Lake Superior region during the : Henry Halls. Request PDF | On Jan 1,J.D. Miller and others published The Geology and Mineral Deposits of the Ga Midcontinent Rift in the Lake Superior Region - An.
Lake Superior Geology. The magenta and green areas show where a plume of hot mantle rock rose and spread under the stiffer lithosphere (the crust and uppermost mantle), stretching the old rocks which started to pull apart along great fissures, tracing out a huge arc known as the Midcontinent Rift System.
The volcanic rocks associated with the Midcontinent Rift System accumulated in at least eight basins in the Lake Superior area as the intensity and character of rifting changed in time and place.
Each basin sank centrally, and the edges of some were eroded prior to the effusion of overlapping plateaus. Private library stamp. Increasing evidence has shown that the structural basin which contains Lake Superior is the only surface exposure of a major continental rift, the Midcontinent Rift System, which developed in Middle and Upper Proterozoic time over a vast area of central North America.
The papers in this. The rift gave rise to Lake Superior, which is the basis of the area's water-based history and economy, the copper and building stone deposits that. Keweenawan sedimentary rocks associated with the Midcontinent Rift System form a thick, dominantly red-bed sequence of fluvial-lacustrine origin in eastern Minnesota and northwestern Wisconsin.
The strata can be divided into two major sequences on the basis of mineral composition and tectonic setting. Lake Superior basin segment of the midcontinent rift system: Lake Superior basin (Minnesota, Wisconsin, Michigan), JulyAuthor: Albert Binkley Dickas ; Theodore J Bornhorst ; American Geophysical Union.
Abstract. In the Lake Superior region, four “sequences” of sedimentary rocks reflect the tectonic-sedimentary framework immediately before, during, and after the Ma magmatic event that resulted in as much as 20, m of dominantly basaltic subaerial lava flows and large gabbroic intrusions (Behrendt et al.
).Cited by: 1. Abstract. Seismic reflection, aeromagnetic, and gravity data along the Ga Midcontinent Rift System reveal that the greatest thicknesses (15–22 km) of Keweenawan lavas are contained within asymmetric grabens bounded by what are now listric reverse faults, but which must have acted as normal growth faults during much of the volcanism (Chandler et al.
; Cannon et Cited by: 3. Vol. T, Lake Superior Basin Segment of the Midcontinent Rift System Vol. T, Porphyry Copper Deposits in the American Southwest: Tucson to Globe-Miami, Arizona July19–23, Vol. T, Cordilleran Volcanism, Plutonism, and Magma Generation at Various Crustal Levels, Montana and Idaho Western Montana and Central Idaho.
The Lake Superior basin occurs within the granite-greenstone terrane, just to the north of the boundary (Great Lakes Tectonic Zone; Sims et al ) between the terranes. The rift system broadens within the. Abstract. Continental rifting at Ga produced approximately × 10 6 km 3 of igneous rocks over a rift length of km (Midcontinent Rift System, MRS).
These constitute one of the largest as well as oldest flood basalt : John C. Green. An integrated geophysical investigation of the midcontinent rift system: Western Lake Superior, Minnesota, and Wisconsin. both ridges are underlain by a belt of granitic rocks within the buried Archean greenstone-granite province beneath the rift basin, testifying to the significant influence of ancestral structures throughout the Author: David Jennings Allen.
Midcontinent Rift System in Northeastern Kansas Timothy S. Woelk 1 and William J. Hinze 2. 1 ARCO Oil & Gas Company and 2 Purdue University This article available as an Acrobat PDF file ( Mb).
Introduction. One of the major tectonic features of North America is the 1,Ma Midcontinent Rift System (MCR). Lake Superior Basin Segment of the Midcontinent Rift System Book The Lakes Handbook, Volume 1: Limnology and Limnetic Ecology Book The Lakes Handbook, Volume 2: Lake Restoration and Rehabilitation Book.
Post-Marquette discharge from Glacial Lake Agassiz into the Superior basin Article (PDF Available) in Journal of Paleolimnology 47(3). Midcontinent Rift system and in the Grand Canyon area, Arizona.
In the Lake Superior segment of the Midcontinent Rift system, at shallow depths, indigenous oil seeps are present in thin intervals of silty shales of the Nonesuch For-mation.
These shales contain as much as percent total organic carbon (average percent) and are marginally. Mapping of the Midcontinent rift system and its importance. The discovery and exploitation of rich native copper deposits in the Keweenawan volcanic and sedimentary rocks of the Lake Superior region in the mid-nineteenth century led to extensive mapping of the Keweenawan Supergroup rocks along the shore of Lake Superior, its islands, and adjacent areas (e.g., Author: William J.
Hinze, Val W. Chandler. Compilation maps of crustal time-terms and apparent thickness in the Lake Superior region reveal an area where the Moho is anomalously deep with crustal thicknesses ranging from about 45 to perhaps more than 50 km.
This anomalous region is centered on the eastern and central parts of Lake Superior, on the axis of the Midcontinent Rift System. Miller, J., and Nicholson, S.W. Geology and mineral deposits of the Ga Midcontinent Rift in the Lake Superior region – an overview.
In Field guide to the copper-nickel-platinum group element deposits of the Lake Superior Region. Edited by Miller, J. Precambrian Research Center Guidebook pp. 1– Google ScholarCited by: 7. Caribou Island is an uninhabited island in the eastern end of Lake Superior, 40 kilometres (25 mi) south of Michipicoten lies entirely within the territorial waters of Canada although only about five kilometres from the international border between Canada and the United is approximately kilometres ( mi) long and kilometres ( mi) wide, and 1, acres Coordinates: 47°21′33″N 85°48′36″W /.
mantle-derived lava up to 16 miles thick flooded the mile-long midcontinent rift that arcs through Lake Superior. The short time span and large volume of magma effused suggest that hot mantle plumes impinged on the base of the North American Plate in northwestern Canada and Lake Superior about and billion years ago, respectively.
North Shore: Lake Superior is centered over the Midcontinent Rift System; this is often said to be where the fountains of the deep erupted at the beginning of the Flood of Noah’s day.
The Midcontinent Rift system forms an arch from Detroit to Lake Superior to. The rocks of the Ga Midcontinent Rift System have been removed from the map, and Michigan and Wisconsin are thus positioned km closer to Minnesota–Ontario than they were after the formation of the Midcontinent Rift System.
Arrows denote generalized transportation directions of sediment from major source by: One of the most prominent features on gravity and magnetic maps of North America is the Midcontinent Rift (MCR), composed of an extensive band of buried igneous and sedimentary rocks that outcrop near Lake Superior ().To the south, the rift is deeply buried by younger sediments but is easily traced because the igneous rocks are dense and highly magnetized Cited by: Geophysical evidence in the Mid-Continent has led to delineation of a rift system active during the Proterozoic Y Era.
The Mid-Continent rift system can be traced by the Mid-Continent gravity high and corresponding aeromagnetic anomaly signature from the surface exposure of the Keweenawan Supergroup in the Lake Superior basin southwest in the subsurface through.
GEOLOGICAL SETTING All of the strata (about Ga old; Van Schmus et al., ) in which these calcareous horizons occur are fluvial and were deposited along the inner margins of the Lake Superior basin which had developed along a segment of the Midcontinent Rift System, due to basin subsidence during and after continental basaltic volcanism Cited by: Copper Harbor Conglomerate.
Lake Superior’s deep basin began forming million years ago when a ‘hot spot’ in the mantel below caused the crust here to stretch, The Mesoproterozoic Midcontinent Rift System, Lake Superior Region, U.S.A.: Sedimentary Geology, v.p.
Copper Harbor Conglomerate at Horseshoe Harbor (GC34PC3) was created by Earth Educator on 9/23/ It's a Not chosen size geocache, with difficulty of 3, terrain of 3. It's located in Michigan, United d at the tip of the Keweenaw Peninsula on Lake Superior, Horseshoe Harbor has a beautiful outcrop of the unique rock,Copper Harbor.
April LIP of the Month. Tectonic Issues for the Midcontinent Rift. Today’s basin below Lake Superior is deformed by reverse faults including the Isle Royale and Keweenaw faults. Both the volcanics and post-rift sediments dip and thicken toward the basin center, with older units dipping more steeply, indicating that they were.
Overview: Upper Keweenawan Rift-Fill Sequence, Mid-Continent Rift System, Michigan / P.A. Daniels [Jr.] and R.D. Elmore (p. ) --Road log --Outcrop descriptions: stops 1 --Keweenawan-age caliche and vadose carbonate in rocks of Michigan's upper peninsula (lecture abstract) / J.
Kalliokoski (p. ) --Middle Proterozoic (Keweenawan. The Midcontinent Rift System is a 1,km (mi) long Middle Proterozoic aborted rift extending from the Lake Superior region southwestward into Kansas (Sims, ). The rift can be divided into three distinct segments (Dickas and Mudrey, ) separated from each other by accommodation structures.
Tectonophysics, () Eisevier Science Publishers B.V., Amsterdam Crustal structure of the central graben of the Midcontinent Rift beneath Lake Superior John Shay * and Anne Tru College of Oceanography, Oregon State University, Corvallis, ORUSA (Received J ; revised version accepted Ma ) ABSTRACT Travel times Cited by:.
The Midcontinent rift system forms one of the most prominent gravity features in North America. The geophysical anomaly extends in an arc from Oklahoma to Lake Superior and then into Kentucky.
The Midcontinent Rift System was active between Ga as indicated in the Lake Superior region by.The Midcontinent rift system in the subsurface south of the Lake Superior region has been well imaged by magnetic, gravity and seismic surveys, however only a few wells have penetrated and recovered core from rift-basin fill in this region.LIBRARY SYSTEM NUMBER 57 January Dickas, Albert B.
Lake Superior basin segment of the midcontinent rift system Lake Superior basin (Minnesota, Wisconsin, Michigan), JulyWashington, D.C.: American Geophysical Union, C .