• The Precambrian ( /priˈkæmbri.ən, -ˈkeɪm-/ pree-KAM-bree-ən, -⁠KAYM-; or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of...
    32 KB (3,511 words) - 21:05, 2 April 2024
  • "Precambrian rabbits" or "fossil rabbits in the Precambrian" are reported to have been among responses given by the biologist J. B. S. Haldane when asked...
    15 KB (1,706 words) - 08:37, 19 March 2024
  • Thumbnail for Canadian Shield
    the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American...
    21 KB (2,234 words) - 13:21, 1 April 2024
  • Precambrian Research is a peer-reviewed scientific journal covering the geology of the Earth and its planetary neighbors. It is published by Elsevier...
    2 KB (76 words) - 17:47, 30 July 2023
  • the known Cambrian lagerstätten are rare and difficult to date, while Precambrian lagerstätten have yet to be studied in detail. The sparseness of the...
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  • Thumbnail for Shield (geology)
    A shield is a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. These rocks...
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  • giant impacts that help to increase its overall size. c. 4,533 Ma – The Precambrian (to c. 539 Ma), now termed a "supereon" but formerly an era, is split...
    64 KB (7,668 words) - 13:29, 20 January 2024
  • Precambrian is the third studio album by German post-metal band The Ocean, released on 5 November 2007 through Metal Blade Records. It features several...
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  • Hadean (redirect from Early Precambrian)
    rocks – Includes rocks over 4 billion years old from the Hadean Eon Precambrian – History of Earth 4600–539 million years ago Timeline of natural history...
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  • Thumbnail for Precambrian body plans
    Until the late 1950s, the Precambrian was not believed to have hosted multicellular organisms. However, with radiometric dating techniques, it has been...
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  • and Blanco counties, Texas. It consists of an island-like exposure of Precambrian igneous and metamorphic rocks surrounded by outcrops of Paleozoic and...
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    Walker, J. C. (1 January 1987). "A constant daylength during the Precambrian era?". Precambrian Research. 37 (2): 95–105. Bibcode:1987PreR...37...95Z. CiteSeerX 10...
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    however, was a "fixist" and, erroneously, explained the presence of Precambrian and Paleozoic metamorphic rocks on the New Siberian, Wrangel, and De...
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  • Thumbnail for Geology of the Rocky Mountains
    before the mountains were raised by tectonic forces. The oldest rock is Precambrian Wyoming craton that forms the core of the North American continent. The...
    18 KB (2,187 words) - 06:02, 13 December 2023
  • Thumbnail for Proterozoic
    Proterozoic (category Precambrian geochronology)
    and followed by the Phanerozoic, and is the most recent part of the Precambrian "supereon". The Proterozoic is subdivided into three geologic eras (from...
    21 KB (2,091 words) - 06:34, 1 April 2024
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    continents", which leaves room for interpretation and is easier to apply to Precambrian times. To separate supercontinents from other groupings, a limit has...
    32 KB (3,806 words) - 18:16, 28 March 2024
  • Thumbnail for Rocky Mountains
    The oldest rock is Precambrian metamorphic rock that forms the core of the North American continent. There is also Precambrian sedimentary argillite...
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  • Thumbnail for Cambrian
    recognition of its distinction from younger Ordovician rocks and older Precambrian rocks, it was not until 1994 that the Cambrian system/period was internationally...
    56 KB (5,536 words) - 12:31, 6 April 2024
  • Thumbnail for List of tectonic plates
    Block – Part of the Congo craton of central Africa (Zambia) Congo Craton – Precambrian craton that with four others makes up the modern continent of Africa...
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  • Thumbnail for Bigfoot
    Bigfoot, also commonly referred to as Sasquatch, is a large and hairy human-like mythical creature alleged by some to inhabit forests in North America...
    187 KB (17,002 words) - 18:19, 10 April 2024
  • M. A. (1976). "New Records of Fossils in the Valdaian Group of the Precambrian on the Syuz'ma River" (PDF). Izvestiya Akademii Nauk SSR. Seriya Geologicheskaya...
    81 KB (4,859 words) - 08:52, 5 January 2024
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    from a single common ancestor that lived 650 million years ago in the Precambrian. 25 of these are novel core gene groups, found only in animals; of those...
    125 KB (11,120 words) - 19:49, 17 April 2024
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    than 3.5 billion years ago. Stromatolites were much more abundant in Precambrian times. While older, Archean fossil remains are presumed to be colonies...
    104 KB (10,815 words) - 18:48, 12 April 2024
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    bryophytes. However, fossils of organisms with a flattened thallus in Precambrian rocks suggest that multicellular freshwater eukaryotes existed over 1000...
    94 KB (7,989 words) - 22:45, 7 April 2024
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    Great Falls is on the fall line of the Potomac River, and its rocks date to the late Precambrian....
    298 KB (26,512 words) - 18:44, 17 April 2024
  • Thumbnail for Stromatolite
    branching types. Stromatolites occur widely in the fossil record of the Precambrian but are rare today. Very few Archean stromatolites contain fossilized...
    40 KB (3,942 words) - 16:23, 25 March 2024
  • Thumbnail for Continent
    North America South America Zealandia. Due to lacking the presence of Precambrian cratonic rocks, Zealandia's status as a geological continent has been...
    89 KB (8,748 words) - 19:01, 17 April 2024
  • Thumbnail for Mauritia (microcontinent)
    12.1803083°S 61.1671222°E / -12.1803083; 61.1671222 Mauritia was a Precambrian microcontinent that was situated between India and Madagascar until their...
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    temperatures. The Precambrian took place between the time when Earth first formed 4.6 billion years (Ga) ago, and 542 million years ago. The Precambrian can be split...
    46 KB (5,305 words) - 02:42, 12 February 2024
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    province is composed of the oldest rocks in the region—gneiss, granite, and Precambrian marble – formed by melting sedimentary rock which recrystallized in a...
    18 KB (2,264 words) - 21:18, 10 April 2024