1. _Coral oolite_, or Coral rag. Limestone composed of corals, with shells and echinites. 2. _Oxford clay_; with septaria and numerous fossils. Beds of calcareous grit, called _Kelloway-rock_ swarming with organic remains. 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. _Subdivisions_:-- 1. Upper Lias shale, full of saurian remains, belemnites, ammonites, &c. intercalated with the lowermost beds of the Oolite: nodules and beds of limestone. 2. Lias marlstone; calcareous, sandy, and ferruginous strata, very rich in terebratulæ and other marine shells. 3. Lower Lias clay and shale, abounding in _gryphea incurva_, and other marine shells; intercalations of sands and clays, with nodules of limestone.