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Farther up they came on the flat juniper and crossed a wet ground-thicket of whortleberry: their feet were in the moist moss among sprigs of heath; and a great fir-tree stretched his length, a peeled multitude of his dead fellows leaned and stood upright in the midst of scattered fire-stained members, and through their skeleton limbs the sheer precipice of slate-rock of the bulk across the chasm, nursery of hawk and eagle; wore a thin blue tinge, the sign of warmer light abroad.
Close to the junction between this upper black slate-rock and the upper red sandstone, I found the Gryphaea Darwinii, the Turritella Andii, and vast numbers of a bivalve, too imperfect to be recognised.
The rocks are of many kinds, white laminated, sometimes siliceous sandstone, purple and red sandstone, sometimes so highly calcareous as to have a crystalline fracture, argillaceous limestone, black calcareous slate-rock, like that so often described at Copiapo and other places, thinly laminated, fine-grained, greenish, indurated, sedimentary, fusible rocks, approaching in character to the so- called pseudo-honestone of Chile, including thin contemporaneous veins of gypsum, and lastly, much calcareous, laminated porcelain jasper, of a green colour, with red spots, and of extremely easy fusibility: I noticed one conformable stratum of a freckled-brown, feldspathic lava.
In spite however of new faubourgs, new bridges, and new squares, Angers still retains the impress of the middle ages; its steep and narrow streets, its dark tortuous alleys, the fantastic woodwork of its houses, the sombre grimness of the slate-rock out of which the city is built, defy even the gay audacity of Imperialist prefects to modernize them.
Above this great conglomerate, we have from two to three hundred feet in thickness of red sandstone; and above this, a stratum of black calcareous slate-rock, like that which alternates with and replaces the underlying yellowish-white, siliceous sandstone.
I did not ascend Mount McConnel, but it seemed to be composed of a species of domite. On the subordinate hills I observed sienite. The bed of the river furnished quite a collection of primitive rocks: there were pebbles of quartz, white, red, and grey; of granite; of sienite; of felspathic porphyry, hornblende, and quartz-porphyry; and of slate-rock. The morning was cloudless.
No stronger proof of their aethereal conversational earnestness could be offered. A locality was given to the Great Secret, and of course it was the place where the most powerful recent impression had been stamped on the mind of the discoverer: the shadowy valley rolling from the slate-rock. Woodseer was too artistic a dreamer to present the passing vision of Carinthia with any associates there.
Hence we see that, as far as the evidence of these two shells serves and the Turritella is an eminently characteristic species the whole thickness of this vast pile of strata belongs to the same age. Again, above the last-mentioned upper red sandstone, there were several alternations of the black, calcareous slate-rock; but I was unable to ascend to them.
Purple and gold were the lights on the hills; the leaves were just turning brown; here and there on the sunny slopes the stubble-fields looked tawny; down in a cleft of yon purple slate-rock the beck fell like a silver glancing thread; all just as it is to-day.
To return to our section near Las Amolanas: Above the yellow siliceous sandstone, or the equivalent calcareous slate-rock, with its bands of fossil-shells, according as the one or other prevails, there is a pile of strata, which cannot be less than from two to three thousand feet in thickness, in main part composed of a coarse, bright red conglomerate, with many intercalated beds of red sandstone, and some of green and other coloured porcelain-jaspery layers.
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