Journal of researches into the natural history and geology of the countries visited during the voyage round the world of the H.M.S. 'Beagle' : under the command of Capt. Fitz Roy, R.N. (1890)
Darwin, Charles, 1809-1882 · London : J. Murray · leaf 435
etween three and four thousand feet. Their flanks are studded by innumerable smaller orifices. I scarcely hesitate to affirm that there must be in the whole archipelago at least two thousand craters. These consist either of lava and scoriae, or of finely-stratified, sandstone -like tuff. Most of… … one of the twenty-eight tuff-craters which were examined had their southern sides either much lower than the other sides, or quite broken down and removed. As all these craters apparently have been formed when standing in the sea, and as the waves from the trade wind and the swell from the open…
Natural history · Geology · Voyages around the world · Description and travel · Beagle Expedition (1831-1836) · South America -- Description and travel
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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