Definition of Precambrian in English:



  • 1Relating to or denoting the earliest aeon of the earth's history, preceding the Cambrian period and the Phanerozoic aeon.

    Compare with Cryptozoic
    • ‘It extends upwards from a depth of about 6 km, at which depth Precambrian crystalline basement is predicted from seismic refraction studies.’
    • ‘Turquoise here was found as vein fillings and nodules in weathered Precambrian granite.’
    • ‘By the early years of the twentieth century, as the geology of the continents began to be better known, it was realized that Permian and Precambrian glacial deposits occur virtually on all continents and at low latitudes.’
    • ‘The crest of the Blue Ridge is usually underlain with Precambrian or Cambrian igneous rocks.’
    • ‘Plenty of suitable sedimentary deposits exist within the late Precambrian and Cambrian strata.’
    1. 1.1as noun the Precambrian The Precambrian aeon or the system of rocks deposited during it.