BAJOCIAN , ingeology, the name proposed in 1849 by d'
See also:Orbigny for the rocks of
See also:Jurassic age which are well
See also:developed in the neighborourhood of
See also:Calvados . The Bajocian stage is practically
See also:equivalent to the Inferior Oolite of ,
See also:British geologists . It corresponds fairly closely with the
See also:Lower and Middle
See also:Brown Jura of Quenstedt, and with the Dogger of
See also:Oppel . By means of the fossil
See also:ammonites the Bajocia strata have been subdivided into the following zones, in descending
See also:order: Zone of Parkinsonia Parkinsoni and Cosnaoceras garantianum Coeloceras subcoronatum (Humphriesianum) Sonninia Romani Stephaeoceras Sowerbyi Harpoceras concavum Murchisonae Substage Aalenien opalinum of Mayer-Eymar . It should be remarked that some
See also:European geologists prefer to include the Parkinsonia zone in tile
See also:base of the overlying Bathonian (q.v.) . The Bajocian rocks of
See also:Europe are mostly limestones of various kinds, very frequently oolitic . At Bayeux, the type
See also:district, they are ferruginous oolites; in the Jura and
See also:Lorraine a
See also:limestone overlies a crinoidal variety; calcareous sandy and many beds occur in Maine and
See also:Anjou; in
See also:Poitou the limestone is dolomitic and bears nodules of chert . Rocks of the same age, as recognized by their fossil contents, have a wide range; they are found in
See also:north Africa,
See also:Somaliland, German East Africa, and north-west
See also:Madagascar; through
See also:southern Europe they may be followed into Turkestan, and-the Kota-Maleri beds of the Upper
See also:Gondwana series of India may possibly belong to this stage . In South
See also:America they appear in
See also:Bolivia, Chile and
See also:Argentina; in North America, in British
See also:Columbia, Dakota, Mexico,
See also:Oregon and California . The Bajocian
See also:sea also included parts of New South
See also:Wales, New Zealand (
See also:Flag Hills beds ?),
See also:Borneo and
See also:Japan, and it extended into the polar region of eastern
See also:Greenland and
See also:Franz Josef
See also:Land . In addition to the ammonites already mentioned, the large belemnites (Megateuthis giganteus) and terebratulas (T. perovalis) are worthy of
See also:notice; crinoids and corals were abundant, and so also were certain forms of Trigonia (T. costata), Pleurotomaria and Cidaris . See JuRAssic; also A. de Lapparent, Traite de geologie, vol. ii .
(5th ed., 1906); and H . B .Woodward, " The Jurassic Rocks of Britain," vol. iv., 1894 (Mem . Geol . Survey) ; both
See also:works contain references to
See also:original papers . (J . A .
BAIZE (16th century Fr. baies, cf. English " bay ")...
BAJOUR, or BAJAUR
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.