Isua Greenstone Belt
Archean greenstone belt in southwestern Greenland / From Wikipedia, the free encyclopedia
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The Isua Greenstone Belt is an Archean greenstone belt in southwestern Greenland, aged between 3.7 and 3.8 billion years.[2] The belt contains variably metamorphosed mafic volcanic and sedimentary rocks, and is the largest exposure of Eoarchaean supracrustal rocks on Earth.[3] Due to its age and low metamorphic grade [4] relative to many Eoarchaean rocks, the Isua Greenstone Belt has become a focus for investigations on the emergence of life[5][6] and the style of tectonics that operated on the early Earth.[7][8]
Quick Facts Dimensions, Length ...
Isua Greenstone Belt | |
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Dimensions | |
Length | 35 km (22 mi)[1][2] |
Geography | |
Country | Greenland |
Geology | |
Age of rock | Archean |
Type of rock | tonalite, mafic rocks, metasedimentary rocks, banded iron formations, granite and granodiorite |
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