(See quot. 1833.) Also gault clay.
单词 | θ5390 |
释义 | the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > secondary or Mesozoic > Cretaceous > specific (8) gault1575 (See quot. 1833.) Also gault clay. weald clay1822 the upper stratum of the Wealden formation immediately above the ‘Hastings sand’; also plural with reference to the various subdivisions of this… Wealden1828 Geology. The name of a formation or series of estuarine and freshwater deposits of Lower Cretaceous age, extensively developed in the Weald. Neocomian1845 Frequently with the. The Neocomian period; the series of rocks laid down during this time. Washita1860 (The rocks of) a subdivision of the Cretaceous in the central-southern U.S.A. Albian1863 The Albian stage of the Cretaceous; the strata dating from this stage. Fairlight clays1874 In plural and singular. A band of clays and shales of the Wealden series (Lower Cretaceous) extending through Kent and East Sussex. Maastrichtian1931 The Maastrichtian stage or age. Usually with the. |
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