Image: Garnet paragneiss Nuvvuagittuq Greenstone Belt, 4.28 Ga

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Description: Garnet paragneiss ("faux-amphibolite") (3.0 cm across at its widest), dating to 4.28 Ga, the oldest known Earth rock of which direct samples are available. Reported minerals: garnet, cummingtonite amphibole, biotite mica, quartz, plagioclase feldspar, anthophyllite, cordierite. Geology & age: Nuvvuagittuq Greenstone Belt, Eoarchean, 4.28 Ga. Locality: western Ungava Peninsula, eastern side of Hudson Bay, northwestern Quebec, eastern Canada (= locality of O'Neil et al., 2008, Science 321: 1828-1831).
Title: Garnet paragneiss Nuvvuagittuq Greenstone Belt, 4.28 Ga
Credit: Garnet paragneiss (Nuvvuagittuq Greenstone Belt, Eoarchean, 4.28 Ga; western Ungava Peninsula, eastern side of Hudson Bay, Quebec, Canada)
Author: James St. John
Usage Terms: Creative Commons Attribution 2.0
License: CC BY 2.0
License Link: http://creativecommons.org/licenses/by/2.0
Attribution Required?: Yes

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