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Topic: Kenorland

Related Topics

Laurentia

Baltica

Nena (supercontinent)

Atlantica

Ur (continent)

Euramerica

Supercontinent

Pannotia

Laurasia

Rodinia

Gondwana

Ikeja

Sao Penza

Ngoc Linh

Pangaea

	Abstract (Site not responding. Last check: 2007-10-14)
		The oldest one is the Neoarchaean Kenorland, which comprised at least Laurentia,
		of Kenorland during the 2.45- to 2.10-Ga interval is manifested by mafic dykes and sedimentary rift-basins on many continents.
		The configurations of Kenorland, Hudsonland and Rodinia depart from each other and also from the Pangaea assembly.
	www.geo.au.dk /english/publ/a2003/na/08.html (285 words)

	PROGRESS TOWARD RECONSTRUCTING PALEOPROTEROZOIC SUPERCONTINENTS (Site not responding. Last check: 2007-10-14)
		Global abundances of isotopic ages for deformation, plutonism, and juvenile isotopic signatures, all point to periods of enhanced tectonism at 2.7—2.6 and 2.1—1.8 Ga. Conversely, widespread mafic and bimodal magmatism characterizes the interval 2.45—2.1 Ga. These observations suggest the existence of two Neoarchean to Paleoproterozoic supercontinents, Kenorland and Nuna (a.k.a.
		Confidence in Kenorland's existence is limited by relatively fragmentary preservation of earliest Proterozoic supracrustal rocks; a relatively bountiful late Paleoproterozoic geological record provides more assurance that Nuna was a true supercontinent of modern proportions.
		Aside from a few hypothesized connections between pairs or trios of cratons, the shape of earliest Paleoproterozoic Kenorland is ill constrained.
	gsa.confex.com /gsa/2004AM/finalprogram/abstract_78551.htm (427 words)

	74
		It is postulated that the Great Dyke event was initiated by a late-Archaean mantle plume and whereas the Great Dyke probably comprises mixtures of plume core, margin and local mantle compositions, the satellite dykes were generated by interaction between the plume margin and local mantle.
		Palaeoproterozoic continental reconstructions suggest that the Wyoming and Superior provinces were part of an Archaean megaprovince (Kenorland), and that the Kennedy dykes may have been contiguous with the Kenora-Kabetogama swarm.
		It is postulated that this episode of plume-related magmatism was responsible for initiating the fragmentation of Kenorland into the now separate Wyoming and Superior Provinces.
	www.the-conference.com /JConfAbs/2/74.html (661 words)

	Everything about Laurentia (Site not responding. Last check: 2007-10-14)
		- ~2.1 billion years ago, when Kenorland shattered, the Arctican craton was part of the minor supercontinent Nena along with Baltica and Eastern Antarctica.
		Major League Baseball The use of the maple leaf as a Canadian symbol dates back to the early 18th century, and is depicted on its current and previous flags, the penny, an
		Kenorland was a supercontinent that existed in the Neoarchean Era about 2450 - 2100 million years ago.
	1030.en.wikimiki.org /en/Laurentia (10597 words)

	Poster Session
		Recent geochronologic investigations focused along the northern and eastern margins of the Wyoming craton have constrained the formational ages of subsurface geophysical trends, the nature of which in turn illuminate the tectonic significance of the ages themselves, regarding the ~1900-1700 Ma assembly of SW Laurentia.
		This interpretation is consistent with ~2550 Ma U/Pb ages of metamorphic monazite newly obtained in deformed rocks of the Madison mylonite zone (MMZ), which is collinear with the SSZ and may represent its southwestern extension.
		In map view, the proposed ~2550 Ma SSZ-MMZ suture appears to be truncated by the SW margin of Laurentia, suggesting that whatever landmass may have rifted away from it during the ~2450 Ma breakup of Kenorland or ~800 Ma breakup of Rodinia should exhibit the continuation of this older suture.
	serc.carleton.edu /earthscoperockies/volabstracts.html (11171 words)

	t33a in sm04
		AB: Global isotopic age peaks have suggested four major episodes of supercontinental assembly throughout Earth history: 2700 Ma (assembly of Kenorland), 2100-1800 Ma (Nuna), 1300-1100 Ma (Rodinia), and 600-300 Ma (Gondwanaland-Pangea).
		Supercontinental breakup intervals would then be limited to 2450-2100 Ga (Kenorland), 830-615 Ma (Rodinia), and 200-60 Ma (Gondwanaland-Pangea).
		In this view, accelerating tempo of plate reorganizations would appear at odds with standard thermal evolution models of the Earth, which contend that greater rates of plate reorganization should be found in the distant past.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=sm04&database=/data/epubs/wais/indexes/sm04/sm04&maxhits=200&="T33A" (1746 words)

	Mineral Deposits of Canada - The Slave Craton: Geological and Metallogenic Evolution (Site not responding. Last check: 2007-10-14)
		Much of the Slave craton is old and within the context of the Laurentian collage it can be regarded, for all practical purposes, as an exotic fragment of crust relative toother well-known cratons in Laurentia such as the Superior, Nain, and Rae (Bleeker, 2003, 2004).
		As a mere fragment of ancient crust, surrounded by Paleoproterozoic rifted margins, it originated from the break-up of a much larger late Archean landmass-perhaps a speculative late Archean supercontinent Kenorland (Williams et al., 1991) or, perhaps more likely, a smaller landmass referred to as the supercraton Sclavia (Bleeker, 2003).
		The late Archean and earliest Proterozoic development of Slave crust should thus be viewed in the context of this larger supercraton (Sclavia),even though the shape and size of this supercraton are currently unknown.
	gsc.nrcan.gc.ca /mindep/synth_prov/slave/index_e.php (9685 words)

	astrobiology (Site not responding. Last check: 2007-10-14)
		Rock exposures to be investigated include critical samples overlapping in time with the Great Oxidation Event on Earth ca.
		2.3 Ga: reduced paleosols, glacial diamictite, 2.48-2.45 Ga mantle plume event, highly mature quatzites atop of glacials, oxidized paleosols, carbonates with high carbon isotope values, organic-rich shales - shungites, evidence for mantle plume at 2.22 and 2.1 Ga (the last one leading to supercontinent Kenorland breakup).
		We will discuss survivalability of life in the extremely cold, extremely hot environments.
	biospace.nw.ru /astrobiology (703 words)

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