Note 40 — APPENDIX.
Reading edition
Sandstone cliffs twenty miles below Fort Good Hope.
173 Friable sandstone, composed of grayish-white quartz, in smooth, rounded grains, cemented by a brownish basis. Some carbonaceous matter is interspersed through the stone, and it contains small fragments of bituminous shale.
174 Calcareous sandstone passing into slate-clay—bluish-gray colour.
175 Black, flinty-slate, with a flat conchoidal cross fracture. Some of the pieces appear to be rhomboidal distinct concretions.
176 Dull, flinty-slate, with an even fracture.
178 Thin-slaty blackish-gray sandstone, much indurated, containing scales of mica.
179, 180 Bluish-gray sandstone, containing many minute specks of carbonaceous matter; also, in patches, grains of chert, and flinty-slate, and imbedded pieces of iron-shot clay, which has obscure casts of shells. Scales of mica are interspersed through this stone.
181, 182 Sandstone containing specks of bituminous? coal, and casts of some vegetable? substance.
183 Gray limestone, much impregnated with quartz, and having an imperfect crystalline structure.