Narrative of a Second Expedition to the Shores of the Polar Sea Part 20

[Ill.u.s.tration]

In the section the strata are represented much more inclined than they really are.

231 Fine-grained, nearly compact, yellowish-gray dolomite, forming the summit of the hill, but the first, or lowest stratum, in the language of geologists.

232 Compact, splintery dolomite, with a conchoidal fracture, and wax-yellow colour--second stratum.

233 A cherty dolomite; containing calc-spar--third stratum.

234 Bluish-gray dolomite, traversed by calc-spar--is nearly compact, and has an uneven, splintery fracture--forms the uppermost portion of the fourth stratum.

235 Talcose? limestone, having a curved slaty structure, and containing cherty portions--from the lower part of the fourth stratum.

236, 237 Earthy greenstone? forms the fifth stratum.

238 Brownish-red dolomite, with an uneven fracture; scarcely splintery.

It has a compact structure, and is intersected by veins of calc-spar--from the sixth stratum.

239 Light yellowish gray dolomite, pa.s.sing into chert--seventh stratum.

240, 241 Thin slaty beds of brownish-red dolomite, like 238--eighth stratum.

242 Bluish-white porcelain chert, sometimes mixed with red dolomite--243--ninth stratum.

[23] _List of boulders gathered on the beach at Fort Franklin._

261 Coa.r.s.e crystalline granite; felspar flesh-red in large crystals; quartz gray; mica black.

262 Granite; felspar paler, and less distinctly crystallized; quartz in small quant.i.ty, gray; mica blackish, and rather abundant.

263 Granite; felspar partly reddish, partly yellowish-white, quartz in small grains; mica equalling the quartz in quant.i.ty, black.

264 Granite, fine-grained: quartz and felspar, white, the former nearly transparent, black mica in small specks, garnets.

265, 268 Granite; quartz in regular crystals; mica blackish, in small quant.i.ty.

266 Granite? red felspar in large crystals; quartz gray; mica replaced by chlorite?

267 Granite; felspar gray; chlorite? in small quant.i.ty.

269 Granite, small grained, pa.s.sing into gneiss; reddish-brown felspar and gray quartz, intimately mixed, and having in the aggregate, a vitreous l.u.s.tre; mica in layers.

270 Granite coa.r.s.er grained than the preceding, containing more quartz; the mica disseminated.

271, 273 Granite with little mica, some portions of the felspar tinged green.

272, 274, 275, 277, 278, 279, 280, Granite grayish and small grained mica black.

276 Granite; brick-red felspar; quartz; and augite?--no mica.

The mica is mostly black in all the granite boulders that occur here, the felspar most frequently reddish.

281 Porphyritic granite? felspar imperfectly crystallized, containing large, imbedded crystals; quartz; and chlorite?

282 Granite? composed of felspar, of quartz, with, perhaps, a few minute grains of chlorite?

283 Granite? contains little quartz, and a few scales of mica, with some chlorite?

284 Sienite; felspar somewhat granular, a little quartz and chlorite?

285 Porphyritic sienite? having a basis of slightly granular felspar, with light-coloured crystals of felspar, some quartz and disseminated grains of chlorite?

286 Reddish-brown hornstone porphyry.

287 Crystalline greenstone.

288 Fine-grained greenstone.

289 Porphyritic greenstone.

290 Pitchstone porphyry.

291 Greenstone slate with pyrites.

292 Amygdaloidal claystone porphyry.

293 Compact grayish-blue dolomite.

294 Splintery dolomite.

295 Cellular dolomite.

296 Swinestone.

297 Limestone with corallines.

298 Chert.

299 White quartz.

300 Quartz-rock.

301 Coa.r.s.e sandstone.

302 Fine-grained white sandstone.

303 Fine-grained red sandstone.