Lower Oolite of Gloucestershire, Oxfordshire, and Northamptonshire.

1.Cornbrash—a coarse shelly limestone.
2.Forest marble; concretions of fissile arenaceous limestone—coarse shelly oolite—sand, grit, and blue clay.
3.Great oolite—calcareous oolitic limestone and freestone; reptiles, corals, &c., upper beds full of shells.
Stonesfield slate;—terrestrial plants, insects, reptiles, Mammalia.
4.Fullers earth beds;—marls and clays, with fuller's earth—sandy limestones and shells.
5.Inferior oolite—coarse limestone—conglomerated masses of terebratulæ and other shells—ferruginous sand, and concretionary blocks of sandy limestone, and shells.

Lower Oolite, of Brora in Scotland.

1.Shelly Limestones—alternation of sandstones, shales, and ironstone; land-plants.
2.Ferruginous limestone, with carbonized wood and shells.
3.Sandstone and shale; with two beds of coal.

Lower Oolite of the Yorkshire coast.

1.Cornbrash—a provincial term for a bluish grey rubbly limestone, with intervening layers of clay.
2.Sandstones and clays, with land-plants, thin beds of coal and shale—calcareous sandstone and shelly limestone.
3.Sandstone—often carbonaceous, with clays; coal-beds, and ironstone, with remains of vegetables.
4.Limestone; ferruginous and concretionary sands.

Obs.—The difference observable between the lower beds of the Oolite in the midland counties, and those of Yorkshire and Scotland, is a fact of considerable interest. The fluvio-marine accumulations of vegetable matter in the state of coal, with the remains of land-plants at Scarborough and Brora, together with the presence of insects, fresh-water crustaceans, mammalia, and terrestrial plants, in the Stonesfield slate, attest the existence of neighbouring land, and the action of rivers and currents.

The Lias. (Wond. p. 521) A series of clays, shales, and limestones, with marine shells, cephalopoda, crinoidea , and fishes in great abundance; reptiles, (particularly of two extinct genera, Plesiosaurus, and Ichthyosaurus,) in immense numbers. Drifted wood and land plants: coniferæ, cycadesæ &c.

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