)
GREAT (OR BATH) OOLITE.
(FIGURE 329. Eunomia radiata, Lamouroux. (Calamophyllia, Milne Edwards.)
a. Section transverse to the tubes.
b. Vertical section, showing the radiation of the tubes.
c. Portion of interior of tubes magnified, showing striated surface.)
Although the name of Coral Rag has been appropriated, as we have seen, to a
member of the Middle Oolite before described, some portions of the Lower Oolite
are equally entitled in many places to be called coralline limestones. Thus the
Great Oolite near Bath contains various corals, among which the Eunomia radiata
(Figure 329) is very conspicuous, single individuals forming masses several feet
in diameter; and having probably required, like the large existing brain-coral
(Meandrina) of the tropics, many centuries before their growth was completed.
(FIGURE 330. Apiocrinites rotundus, or Pear Encrinite; Miller. Fossil at
Bradford, Wilts.
a. Stem of Apiocrinites, and one of the articulations, natural size.
b. Section at Bradford of Great Oolite and overlying clay, containing the fossil
encrinites. (See text.)
c.
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