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.
[41]Mackenzie notices the precipices of "gray stone," which bound the river here, p. 71.
[43]Specimens from Sellwood Bay.
202 Fine-grained dark brownish-gray dolomite, with corallines filled with white calc-spar.
203 Lucullite grayish-black, compact, and without lustre.
204 Gray dolomite.
205 A rolled piece, evidently of the same rock with the preceding, containing the impression of a cardium.