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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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