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Topic: Archaean

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	A New Approach to Earth History » New land in the Archaean
		While estimates carry large margins of uncertainty, at least 50% is thought to have formed during the Archaean and most of the rest during the subsequent Proterozoic, by upwelling of hot, liquid rock from the mantle.
		Characteristic rocks of the period are early Archaean gneisses, granite-greenstone belts, and the sediments that accumulated on late Archaean platforms around the craton margins.
		Throughout the Archaean they were strongly affected by episodes of intense metamorphism and deformation, associated with inter-craton collisions and the rise of granite domes.
	www.earthhistory.org.uk /recolonisation/new-land-in-archaean (1078 words)

	Artist Profile - Archaean Harmony (Site not responding. Last check: 2007-10-28)
		Archaean Harmony was formed in January of 1995, by Darkmortem and Lord Trebor.
		Archaean Harmony suffered many line-up changes and for sometime could not find a steady line-up, a situation the band had to endure for the next 6 years to come.
		Late 1997, Archaean Harmony with the original founding members, new member Adrameleck and with the aid of a session bassist and a drum programmer began to work on their debut demo entitled ‘Resentment of an Evanesce Aeon’.
	www10.brinkster.com /aextremity/profile/aharmony.html (974 words)

	The Archaean
		It was early in the Archaean that life first appeared on Earth.
		The mounds in the foreground are stromatolites, colonies of photosynthetic bacteria which have been found as fossils in Early Archaean rocks of South Africa and Western Australia.
		The Archaean occurs between the Hadean and the Proterozoic.
	www.ucmp.berkeley.edu /precambrian/archaean.html (258 words)

	The First atmosphere—geological evidences and their implications
		Absence of pyrite from many Proterozoic and Archaean sandstones, for instance, despite the common presence of the mineral in the source rocks, is evidence for oxidation during transport and/or diagenesis.
		The distribution of volcanic exhalation sulfide deposits in Archaean terrains does not appear to differ substantially from the Phanerozoic distribution, and the hypothesis that the Early Precambrian primordial ocean was saturated with respect to siderite is similarly unsubstantiated.
		These organic carbon-rich Archaean and Proterozoic sedimentary rocks contain the remains of life, albeit microscopic life by the myriads, and algae, destroyed in the same catastrophe as the invertebrates and vertebrates of the so-called Phanerozoic.
	www.answersingenesis.org /creation/v3/i4/atmosphere.asp (2547 words)

	140
		Taken together, these two studies show that the process of Archaean TTG genesis is more complex than has previously been recognised and that TTG compositions are better understood in terms of mixing processes in which slab melts mix with the mantle and/or older crust.
		This study shows that the ISB was subjected to deformation and high grade metamorphism during the late Archaean, and that the presence of kyanite does not constrain early Archaean geotherms as suggested by Boak and Dymek (1980).
		Archaean chemical sediments comprising cherts, oxide and sulphide facies iron formations contain information about the chemical state of the early oceans and, by implication, the tectonic processes which buffered the chemistry of the early oceans and atmosphere.
	www.the-conference.com /JConfAbs/4/140.html (11687 words)

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