150 Compact, white limestone, which, when examined with a lens, appears to be entirely composed of madrepores.
151 Specimens of limestone, having a crystalline texture, a brownish colour and slaty structure.
152 The seams are dark, as if from the carbonaceous matter—portions of this bed have the appearance of old mortar; but contain obscure madrepores.
From the middle of the ramparts.
153 Fine-granular limestone, having a pale, wood-brown colour, and a splintery fracture. It resembles the limestone of the hill at the mouth of Bear Lake River.
154 Pale yellowish-brown limestone, with a dull fracture, but interspersed with small, shining, sparry plates, and traversed by concretions of calc-spar, that appear to have originated in corallines.
155 Yellowish-gray limestone, passing into a soft marl slate.
156 Some beds contain a shell, which Mr. Sowerby refers, though with doubt, to the species named terebratula sphæroidalis, a fossil of the cornbrash. The substance of the shells is preserved.
Some of the specimens contain producti, and fragments of the coral named amplexus.
Lower end of the ramparts.