• Thumbnail for Acasta Gneiss
    The Acasta Gneiss Complex, also called the Acasta Gneiss, is a body of felsic to ultramafic Archean basement rocks, gneisses, that form the northwestern...
    14 KB (1,735 words) - 21:23, 17 May 2024
  • Thumbnail for Gneiss
    cleavage. Gneisses are common in the ancient crust of continental shields. Some of the oldest rocks on Earth are gneisses, such as the Acasta Gneiss. In traditional...
    19 KB (2,015 words) - 20:47, 23 August 2024
  • Thumbnail for Oldest dated rocks
    on Earth was dated to 4.031 ±0.003 billion years, and is part of the Acasta Gneiss of the Slave craton in northwestern Canada. Researchers at McGill University...
    19 KB (2,195 words) - 15:04, 12 August 2024
  • Thumbnail for Eoarchean geology
    three localities, the Isua Greenstone Belt in Southwest Greenland, the Acasta Gneiss in the Slave Craton in Canada, and the Nuvvuagittuq Greenstone Belt...
    35 KB (4,087 words) - 10:53, 29 November 2023
  • Thumbnail for Laurentia
    Earth, such as the Archean rock of the Acasta Gneiss, which is 4.04 billion years (Ga) old, and the Istaq Gneiss Complex of Greenland, which is 3.8 Ga...
    37 KB (4,452 words) - 22:15, 18 May 2024
  • Thumbnail for Eoarchean
    south-west coast of Greenland, which dates from 3.8 billion years. The Acasta Gneiss within the Canadian Shield have been dated to be 4,031 Ma and are therefore...
    12 KB (962 words) - 04:28, 17 July 2024
  • Thumbnail for Slave Craton
    Territories and Nunavut. The Slave Craton includes the 4.03 Ga-old Acasta Gneiss which is one of the oldest dated rocks on Earth. Covering about 300...
    19 KB (2,496 words) - 08:57, 30 July 2024
  • Thumbnail for Hadean zircon
    Mojzsis, Chen, & Elliott. (2015). Tungsten isotope composition of the Acasta Gneiss Complex. Earth and Planetary Science Letters, 419, 168-177. Roth, Bourdon...
    44 KB (3,785 words) - 01:30, 19 June 2024
  • Thumbnail for Late Heavy Bombardment
    Collectively, the Acasta Gneiss in the North American cratonic shield and the gneisses within the Jack Hills portion of the Narryer Gneiss Terrane in Western...
    44 KB (5,482 words) - 15:54, 6 August 2024
  • Thumbnail for Canadian Shield
    Alberta Tsuyoshi Iizuka, at al., "Geology and Zircon Geochronology of the Acasta Gneiss Complex", Precambrian Research, 153 (2007) pp. 179–208 Pidwirny, M....
    21 KB (2,254 words) - 17:03, 17 August 2024