In the third edition of "Origin," page 403 (363/3. "Origin," Edition VI., page 335, 1882. Forbes informs me that he found in various parts of the Cordillera, from lat. 13 deg W. to 30 deg S., at about the height of twelve thousand feet, deeply furrowed rocks...and likewise great masses of detritus, including grooved pebbles. Along this whole space of the Cordillera true glaciers do not now exist, even at much more considerable height. "), you will find a brief allusion, on authority of Mr. Forbes, on the former much lower extension of glaciers in the equatorial Cordillera.英文原著 · 《More Letters of Charles Darwin Volume I》
Fourth, the few immense lakes extending over the lowlands, in the midst of which many of the interior ranges stood as islands, became shallow as the ice vanished from the mountains, and separated into many distinct lakes, whose waters no longer reached the ocean. Most of these have disappeared by the filling of their basins with detritus from the mountains, and now form sage plains and "alkali flats."英文原著 · 《Steep Trails》
Lavas of the feldspathic, basaltic, and submarine series.--Section of Flagstaff Hill and of the Barn.--Dikes.--Turk's Cap and Prosperous Bays.-- Basaltic ring.--Central crateriform ridge, with an internal ledge and a parapet.--Cones of phonolite.--Superficial beds of calcareous sandstone.-- Extinct land-shells.--Beds of detritus.--Elevation of the land.-- Denudation.--Craters of elevation.英文原著 · 《Volcanic Islands》
Extinct land-shells. Beds of detritus. Elevation of the land. Denudation. Craters of elevation. The whole island is of volcanic origin; its circumference, according to Beatson, is about twenty-eight miles. (Governor Beatson "Account of St. Helena.") The central and largest part consists of rocks of a feldspathic nature, generally decomposed to an extraordinary degree; and when in this state, presenting a singular assemblage of alternating, red, purple, brown, yellow, and white, soft, argillaceous beds.英文原著 · 《Volcanic Islands》