||This article is largely based on an article in the out-of-copyright Encyclopædia Britannica Eleventh Edition, which was produced in 1911. It should be brought up to date to reflect subsequent history or scholarship (including the references, if any). When you have completed the review, replace this notice with a simple note on this article's talk page. (April 2014)|
||It has been suggested that this article be merged with Bathonian. (Discuss) Proposed since April 2014.|
The typical Bathonian Series is the Great Oolite series of England, and the name was derived from the "Bath Oolite", extensively mined and quarried in the vicinity of that city, where the principal strata were first studied by William Smith. According to English practice, the Bathonian includes the following formations in descending order: Cornbrash, Forest Marble with Bradford Clay, Great or Bath Oolite, Stonesfield Slate and Fullers Earth. The Fullers' Earth is sometimes regarded as constituting a separate stage, the "Fullonian".
The "Bathonien" of some French geologists differs from the English Bathonian in that it includes at the base the zone of the ammonite Parkinsonia Parkinsoni, which in England is placed at the summit of the Inferior Oolite. The Bathonian is the equivalent of the upper part of the "Dogger" (Middle Jurassic) of Germany, or to the base of the Upper Brown Jura, substage "E" of Quenstedt.
Rocks of Bathonian age are well developed in Europe: in the northwest and southwest oolite limestones are characteristically associated with coral-bearing, crinoidal and other varieties, and with certain beds of clay. In the north and northeast, Russia, etc., clays, sandstones and ferruginous oolites prevail, some of the last being exploited for iron. They occur also in the extreme north of North America and in the Arctic regions, Greenland, Franz Josef Land, etc.; in Africa, Algeria, Tanzania, Madagascar and near the Cape of Good Hope (Enon Beds); in India, Rajputana and Gulf of Kutch, and in South America.
This article incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Bathonian Series". Encyclopædia Britannica 3 (11th ed.). Cambridge University Press. p. 513. That article further references A. de Lapparent, Traité de géologie (5th ed., 1906), vol ii.