a
brown colour, with considerable lustre in the cross fracture.

The specimens collected by Captain Franklin were as follows:--

144a Sandstone of an ash-gray colour, composed of rounded grains of
semi-transparent quartz of various sizes, imbedded in a considerable
proportion of a powdery basis which effervesces with acids. This bed
weathers readily.

145 Thick-slaty sandstone passing into slate-clay, having a very
fine-grained earthy fracture, and a light bluish-gray colour. It is very
similar to some of the softer sandstones that occur in the coal field at
Edinburgh, particularly in the Calton Hill.

146 Sectile ash-gray slate-clay which forms the partings of the beds.

144b Bluish-gray marl, impregnated with quartz, forming a moderately
hard stone, and containing corallines (_amplexus_.)

[37] _Upper part of the ramparts._

148 A fine-granular, foliated limestone, of a white colour, having large
patches stained yellowish-brown, apparently by bitumen.

149 A yellowish-gray slightly granular limestone, with disseminated
calc-spar.

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 sphaeroidalis, 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._

157 Fine-grained limestone, of a dark-brown colour, containing some
small, round, smooth balls of dark limestone--occurs in horizontal
strata.

158 Brownish-black flinty-slate, which forms a layer an inch thick, and
covers the horizontal beds of limeston