Principles of Geology, Being an Attempt to Explain the Former Changes of the Earth's Surface, by Reference to Causes Now in Operation: Vol. 1, Volume 1J. Murray, 1832 - 586 pages |
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ages ancient animals appear become beds called carried causes century changes cliffs coast cone consider considerable consist continued course covered crater deep delta deposits depth direction distance district earth earthquakes effects elevation entirely equal eruption example existence extent extremely facts feet flowed force formation formed former fossil four geological geologist globe gradually greater ground happened heat height hills hundred inhabitants island isles Italy lakes land latitudes lava length less marine mass matter mean miles mineral mountains nature observations ocean once organic origin period plain portion present probably produced quantity raised recent regions remains remarkable rise river rocks sand seen shells shocks shores side sometimes species springs strata stream subterranean succession suppose surface theory thousand thrown tides tion town tract valleys violent volcanic whole