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Thus, the loam which fills to a great depth the wide valley of the Saone, which is bounded on the west side by an escarpment of Inferior Oolite, and by the chain of the Jura on the east, is very like the loess found in the continuation of the same great basin after the junction of the Rhone, by which a large supply of Alpine mud has been added and intermixed.
Out of this central plain rise several isolated, cone-like hills, the most notable being Glastonbury Tor and Brent Knoll. These belong to the lias and lower oolite rocks. The Poldens consist of lias; and the same formation constitutes the rising ground that bounds the plain on the S. and E. of the county. The southern side of the Poldens is edged with Rhaetic beds, which also extend to High Ham.
While the new red sandstone shews comparatively scanty traces of organic creation, those in the oolite are extremely abundant, particularly in the department of animals, and more particularly still of sea mollusca, which, it has been observed, are always the more conspicuous in proportion to the predominance of calcareous rocks.
Portland stone and sand. c. Kimmeridge clay. MIDDLE OOLITE: d. Coral rag. e. Oxford clay, and Kelloway rock. LOWER OOLITE: f. Cornbrash and Forest marble. g. Great Oolite and Stonesfield slate. h. Fuller's earth. i. Inferior Oolite.
Of reptiles, we read that in 1710 the lowest known were in the Permian; in 1844 they were detected in the Carboniferous; and in 1852 in the Upper Devonian. While of the Mammalia the list shows that in 1798 none had been discovered below the Middle Eocene: but that in 1818 they were discovered in the Lower Oolite; and in 1847 in the Upper Trias.
Near Cromer, blocks of granite from 6 to 8 feet in diameter have been met with, and smaller ones of syenite, porphyry, and trap, besides the wreck of the London Clay, Chalk, Oolite, and Lias, mixed with more ancient fossiliferous rocks. Erratics of Scandinavian origin occur chiefly in the lower portions of the till.
The belemnites are the internal shells of a sort of cuttle-fish which swam about in enormous numbers in the seas whose sediment forms our modern lias, oolite, and gault.
She thought she would try and say something to please Platypus; so she asked, very kindly, if the bone ever hurt it. But this strange creature did not seem to notice the remark. Settling itself more comfortably amongst the grass, it muttered in calmer tones, "I trace my ancestry back to the oolite age. Where does man come in?" "I don't know," said Dot.
The plants of the Keuper are generically very analogous to those of the oolite and lias, consisting of ferns, equisetaceous plants, cycads, and conifers, with a few doubtful monocotyledons. A few species such as Equisetites columnaris, are common to this group and the oolite. Map of Tyrol and Styria showing St.
Brent Knoll is a conspicuous eminence of lias, drowned with a cap of inferior oolite, about 450 ft. above sea-level and four acres in extent. It commands a splendid view, embracing the Mendips and Quantocks, Glastonbury Tor, the Channel, and the River Parrett. Brent, South, 1 m. from Brent Knoll Station, has a church very picturesquely situated on the side of the knoll.
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