Gravel at bottom of sea. —formation of, in Patagonia. —means of transportation of. —strata of, inclined.
Gravel-terraces in Cordillera.
Greenough, Mr., on quartz veins.
Greenstone, resulting from metamorphose hornblende-rock. —of Tierra del Fuego. —on the summit of the Campana of Quillota. —porphyry. —relation of, to clay-slate.
Gryphaea orientalis.
Guasco, elevation of. —secondary formation of.
Guitru-gueyu, Sierra.
Guyana, gneissic rocks of.
Gypsum, nodules of, in gravel at Rio Negro. —deposited from sea-water. —deposits of, at Iquique. —crystals of, in salt lakes. —in Pampean formation. —in tertiary formation of Patagonia. —great formation of, in the Portillo Pass. — —in the Cumbre Pass. — —near Los Hornos. — —at Coquimbo. — —at Copiapo. — —near Iquique. —of San Lorenzo.
Hall, Captain, on terraces at Coquimbo.