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northeastern Minnesota

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Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(06)
EISBN: 9780813756240
... section of the Animikie Basin during its formative stages, with sediments derived from the Archean basement to the north and from the fold-and-thrust belt to the south. The Paleoproterozoic supracrustal rocks in the northwestern segment, including east-central and northeastern Minnesota and the adjoining...
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(a) Geologic map of <b>northeastern</b> <b>Minnesota</b> (modified from  Miller  et al . ...
Published: 23 June 2015
F ig 1. (a) Geologic map of northeastern Minnesota (modified from Miller et al . 2001 ) showing footwall units (Paleoproterozoic and Neoarchean rocks) and the Duluth Complex with its Felsic, Early Gabbroic, Anorthositic, and Layered Series and hanging wall units, which comprise basaltic rocks
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Simplified geologic map of <b>northeastern</b> <b>Minnesota</b> (USA). Rectangle indicate...
in > Geosphere
Published: 01 October 2014
Figure 1. Simplified geologic map of northeastern Minnesota (USA). Rectangle indicates location of Figure 2 .
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Generalized geologic map of <b>northeastern</b> <b>Minnesota</b>. Highlighted intrusions ...
Published: 01 May 2011
Fig. 1 Generalized geologic map of northeastern Minnesota. Highlighted intrusions of the Layered Series: BEI = Bald Eagle intrusion, NLM = Nickel Lake macrodike, SKI = South Kawishiwi intrusion. Modified after Miller et al. (2001) .
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F ig . 1. Generalized geologic map of <b>northeastern</b> <b>Minnesota</b>, modified from...
Published: 01 March 2004
F ig . 1. Generalized geologic map of northeastern Minnesota, modified from Miller and Ripley (1996) , showing the location of the Sonju Lake intrusion.
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Regional geologic map of <b>northeastern</b> <b>Minnesota</b> showing outline of the Virg...
Published: 01 April 2000
Fig. 1. Regional geologic map of northeastern Minnesota showing outline of the Virginia horn area (Fig.  2 ). Inset shows the position of the map within the southern Superior Province
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(07)
EISBN: 9780813756240
... the shores and islands of Lake Superior and (mostly buried under younger rocks) along the MRS to the southwest and southeast (e.g., White, 1960 , 1972 ). The NSVG comprises the supracrustal rocks of the MRS located in northeastern Minnesota. It is intruded by comagmatic and coeval plutonic and hypabyssal...
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Journal Article
Journal: Geosphere
Published: 01 October 2014
Geosphere (2014) 10 (5): 987-997.
...Figure 1. Simplified geologic map of northeastern Minnesota (USA). Rectangle indicates location of Figure 2 . ...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 1986
GSA Bulletin (1986) 97 (1): 85-96.
...M. E. FOSTER; P. J. HUDLESTON Abstract An unusual cleavage is developed in troctolitic rocks of the late Precambrian Duluth Complex in northeastern Minnesota. It is localized in a zone −250 m wide, and it is parallel to the axes of gentle folds in rhythmic banding. The rocks show no textural signs...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1972
GSA Bulletin (1972) 83 (9): 2639-2648.
...JOHN P BRADBURY; ROBERT O MEGARD Abstract Shagawa Lake in northeastern Minnesota is an anomalously productive lake in a region dominated by many very fresh and unproductive lakes. It receives treated sewage from the town of Ely. Mine wastes once entered the lake. A 1-m core of lake sediments...
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0024(24)
EISBN: 9780813756240
... in the field is an essential element in the education and development of geology students, but until recently has received relatively little attention by education researchers. Set against the backdrop of classic bedrock localities of the Midcontinent Rift System in northeastern Minnesota and using new...
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Journal Article
Journal: GSA Bulletin
Published: 01 February 1972
GSA Bulletin (1972) 83 (2): 429-442.
Journal Article
Published: 22 May 2015
The Canadian Mineralogist (2015) 52 (5): 917-920.
... & Evans 2014 ) for amphiboles from the Biwabik iron formation, Northeastern Minnesota, USA. Those analyses can be divided into two groups: (1) Analyses labelled 1/6a, 2/6a 15/6b, 82/13, and 76/7 are to be referred to the simplified formula A □ B Fe 2+ 2 C Fe 2+ 5 T Si 8 O 22 W (OH) 2...
Journal Article
Published: 22 May 2015
The Canadian Mineralogist (2015) 52 (5): 921-924.
... – 447 . Joy , B.R. & Evans , B.W. ( 2014 ) Clinoferrogedrite in the contact-metamorphosed Biwabik Iron Formation, Northeastern Minnesota . Canadian Mineralogist 52 , 533 – 554 . Lamb , W.M. , Guillemette , R. , Popp , R.K. , Fritz , S.J. , & Chmiel...
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Journal Article
Published: 01 June 2014
The Canadian Mineralogist (2014) 52 (3): 533-554.
...Brian R. Joy; Bernard W. Evans Abstract We describe a sample of Proterozoic banded iron-formation from the inner contact aureole of the Duluth complex near Babbitt, Minnesota, that contains a compositionally unique Fe-rich monoclinic ferromagnesian amphibole. Its content of T Al (1.3 atoms per 23...
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Series: GSA Special Papers
Published: 01 January 1997
DOI: 10.1130/0-8137-2312-4.73
Journal Article
Published: 01 October 1995
American Mineralogist (1995) 80 (9-10): 1026-1030.
...Theodore C. Labotka Abstract Calcic garnet from a calc-silicate hornfels from the contact-metamorphic aureole of the Duluth complex, northeastern Minnesota, has TiO 2 compositions ranging from 0 to 13 wt%. The concentrations of Fe, Mg, Al, Ti, and Si are highly correlated, and 93% of the total...
Journal Article
Published: 01 April 1994
Canadian Journal of Earth Sciences (1994) 31 (4): 765.
Journal Article
Published: 01 December 1993
Canadian Journal of Earth Sciences (1993) 30 (12): 2510-2522.
... along strike 170 km to the east near Shebandowan Lake, Ontario, where the end of D 2 deformation has been bracketed between 2692 and 2681 Ma. The slightly younger ages for D 2 deformation in Minnesota reflect later volcanic-arc development and associated plutonism than at Shebandowan Lake, possibly due...
Journal Article
Journal: Economic Geology
Published: 01 July 1991
Economic Geology (1991) 86 (4): 897-898.