Gunflint iron-bearing formation, Ontario

Gunflint iron-bearing formation, Ontario by J. E. Gill Download PDF EPUB FB2

FACIES RELATIONS IN THE GUNFLINT IRON FORMATION [Ontario] [A.M. Goodwin] on *FREE* shipping on qualifying : A.M. Goodwin. Do the fossils found in the great Gunflint Iron Formation of Ontario tell that bacteria were instrumental in the accumulation of the most important iron reserves in the world.

These questions are not solved here, but they are raised for students, scientists, and general readers interested in the most basic evolution and its by: The Gunflint Formation of the late Paleoproterozoic Animiki Group comprises chemical, clastic, and volcaniclastic sedimentary rocks that are –m thick and which extend for km along the Gunflint Range from northeastern Minnesota to the Thunder Bay area of Ontario, Canada.

The Gunflint Formation is known for occurrence of various microfossils, including Gunflintia, Huroniospora and Eoastrion. Fossilized primitive fauna in Gunflint Formation. Gunflint Iron-Bearing Formation, Ontario.

Publication Geological Survey of Canada, Description. Comments (0) Media Type Publication Description Geological Survey of Canada: Report of Progress Summary Report,Part C pCC Gunflint area ; Gunflint iron formations ; Boundary from Gunflint District to Loon Lake, ON ; Mesaba Iron.

The Late Proterozoic Gunflint Formation comprises –m thick iron-rich chemical, clastic, and volcaniclastic sedimentary rocks extending for km along the Gunflint Range from northeastern Minnesota, USA to the Thunder Bay area of Ontario, Canada.

The iron formation is well dated at ± Ma by U-Pb on zircons (Fralick et al. The Gunflint Formation, a Paleoproterozoic chemical clastic sedimentary assemblage outcropping to the immediate northwest of Gunflint iron-bearing formation Superior, became famous in as containing the oldest fossil assemblage known at that by: The Gunflint Iron Formation is one of three members contained in the Animikie Group, underlain by a lower quartzite member, and overlain by the Rove Slate.

These units extend NE-SW for approximately km from Thunder Bay, Ontario to northern by:   Along with a recently reported age for the Gunflint Formation in Ontario of ± 2 Ma, our data suggest that an extensive foredeep in the western Lake Superior region was the locus of iron-formation deposition during arc accretion from the by: Along with a recently reported age for the Gunflint Formation in Ontario of ± 2 Ma, our data suggest that an extensive foredeep in the Ontario book Lake Superior region was the locus of iron.

INTRODUCTION The Gunflint Iron Formation and the overlying Rove Shale comprise the Animikie Group in the Thunder Bay District of Ontario.

The Gunflint sedi- ments extend eastward for about km from the vicinity of Gunflint Lake at the United States/Canada border, to Loon Lake, by: Early Life: Evolution on the PreCambrian Earth, Second Edition offers an informative and compelling analysis of microbial evolution, often overlooked as the opening chapter of life's history.

With this long-awaited new edition, Lynn Margulis and Michael Dolan integrate new discoveries from the past two decades, such as the enormous contribution of molecular biology, especially the accumulation.

Carrigan, W. & Cameron, E. Petrological and stable isotope studies of carbonate and sulfide minerals from the Gunflint Formation, Ontario: Evidence for the origin of.

absolute age of the Gunflint formation is approximately million ( x 10') years (5), and this age places the formation in the lower third ofthe MiddlePrecambrian. In The Gunflint sediments extend east-ward some kilometers from the rt vicinity of Gunflint Lake, on the U.S.-Canada boundary, to Loon Lake, On-tario (Fig.

Isolated Cited by: Abstract A ˜ Ga banded-iron stromatolite from the Mink Mountain locality (PPRG ) of the Gunflint Iron Formation, Ontario, Canada was investigated as an analogue to Martian hematite deposits which have the potential to contain fossilized Martian life.

microscopic fossils uncovered in the Gunflint Iron Formation, a rock layer about two billion years old exposed in western Ontario, Canada. The fossils include filamentous structures resembling blue-green algae (e.g., Gunflintia, Entosphaeroides, and Animikiea), tiny spheroids (e.g., Eosphaera and Huroniospora), star-shaped forms assigned to the genus Eoastrion, and umbrella-shaped forms.

Ayres, D. Genesis of iron-bearing minerals in banded iron formation mesobands in the dales gorge member, hamersley group, Western Australia.

Econ. Geol. 67, – ().Cited by: The Gunflint Formation comprises alternations of ironstones (a generic name for a sedimentary rock rich in iron, such as hematite; we have seen hematite when we discussed chemical weathering in class) and cherts, chemical sedimentary rocks made of silica (SiO 2).

Cherts include layers of stromatolites, and can be red, yellow or black. Gunflint Iron-Bearing Formation, Ontario. Geological Survey of Canada, Geological Survey of Canada: Report of Progress Summary Report,Part C pCC Gunflint area ; Gunflint iron formations ; Boundary from Gunflint District to Loon Lake, ON ; Mesaba Iron Company ; Loon Lake to International Boundary at Gunflint Lake ; Gunflint.

The Gunflint iron-bearing formation of Middle Huronian age is believed to be the equivalent of the Biwabik iron forma-tion of the Mesabi Range. It is from to feet thick in the Gunflint area and may be observed on the north shore and I F.

Grout, "Structural Features of the Sa-ganaga Granite of Minnesota-Ontario," Rept. XVI Internat. The Age of the Gunflint Iron Formation of the Animikie Series in Ontario, Canada. GSA Bulletin () 80 (9): – GUNTER FAURE, JACK KOVACH; The Age of the Gunflint Iron Formation of the Animikie Series in Ontario, by: The Gunflint Range is an iron ore deposit in northern Minnesota in the United States and Northwestern Ontario, Canada.

The range extends from the extreme northern portion of Cook County, Minnesota into the Thunder Bay District, Ontario.

The Gunflint Iron Formation is a continuation of the Mesabi Range to the southwest. Gunflint microfossils, assemblage of microscopic fossils uncovered in the Gunflint Iron Formation, a rock layer about two billion years old exposed in western Ontario, fossils include filamentous structures resembling blue-green algae (e.g., Gunflintia, Entosphaeroides, and Animikiea), tiny spheroids (e.g., Eosphaera and Huroniospora), star-shaped forms assigned to the genus.

These stromatolites are located in rocks of the Gunflint formation, a billion-year-old narrow band of generally iron-rich and cherty rocks that extends from Gunflint Lake on the Minnesota-Ontario border to near Schreiber, Ontario. Cherts are glassy rocks with high silica content that.

The Ga Gunflint Formation in Ontario, Canada, has played a key role in the development of current models for the deposition of iron formations. The presence of hematite-rich iron formation intercalated with chert stromatolites containing purported cyanobacterial microfossils sparked the idea that biology was the principal driver of Fe 2.

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Technical Report, Gunflint Property, Ontario, Canada Iron, Inc. EXECUTIVE SUMMARY: During the period, July 3rd to 14th, the author undertook a site visit to the Canada Iron Inc., (CII) Gunflint Property in Jean and Strange Townships, Ontario, at the request of.

Page 12 - Leith92 thus describe the iron formations, pointing out the distinction between an ' ' iron ore ' ' and an ' ' iron formation ' ': In simplest terms the iron-bearing formations of the Lake Superior region consist essentially of interbanded layers, in widely varying proportions, of iron oxide, silica, and combinations of the two, variously called jasper or jaspilite, where anhydrous 4/5(2).

On the map, the Animikie Group is the dark gray northeast-trending belt which ranges from south-central Minnesota, U.S., up to Thunder Bay, Ontario, Canada.

The Gunflint Iron Range is the linear black formation labeled G, the Mesabi Iron Range is the jagged black linear formation labeled F, and Cuyuna Iron Range is the two black spots labeled E.

Magnetite is one of the dominant iron bearing minerals found in the bedrock of the Lake Superior Region and our local Gunflint Iron Formation. Due to the amount of magnetite in the area you might want to check your compass readings in a variety of locations if you ever find yourself lost in our woods.

The rock strata formed prior to the impact, the Gunflint Iron Formation, contains bands of iron formed in shallow ocean sediments.

The layer of rock that Jirsa is continuing to discover on the Gunflint, which lies on top of the iron formation and is therefore younger, features the breccia, lapilli, and shocked quartz of the impact event.

The item Gunflint iron range in the vicinity of Port Arthur, W.W. Moorhouse. Gunflint iron formation of the Whitefish Lake Area / by A.M. Goodwin represents a specific, individual, material embodiment of a distinct intellectual or artistic creation found in University of Manitoba Libraries.The Gunflint iron-bearing formation, which has been treated before, is here referred to only incidentally.

The Minnesota area of Rove slate is a narrow strip south of the international boundary from Pigeon Point to a few miles west of Gunflint Lake in Cook by: 2.The Rove Formation is in the Arrowhead Region of northeastern Minnesota, U.S., and extends into Ontario, Canada. In Minnesota it occurs along the U.S.-Ontario border from Gunflint Lake to Pigeon Point (both in northeastern Cook County) and northward into Canada.

Pigeon Point is the most eastern part of Minnesota; it is a diabase sill about m ( ft) thick.