Untitled Page 1
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3 revisions | hesperus at Sep 22, 2020 12:11 AM | |
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Untitled Page 1Geological collection. According James D Dana's Manual of Geology consisting of [illegible] characteristic fossils and rocks. Azoic or Archaean Era Laurentian & Huronian Periods represented by granites, syenites, gneiss and other rocks. ... Paleozic Time. Silurian Age. Lower Silurian Potsdam, Chazy, Trenton, Utica, Cincinnati or Hudson river Epochs Upper Silurian Medina, Clinton, Niagara, lower Helderberg, Oriskany Periods represented by 700 species and varieties of fossils. Devonian Age. Corniferous, Hamilton, [illegible] Periods represented by 180 sp & varieties Carboniferous Age subcarboniferous Kinderhook - Burlington - Keokuk - St Louis - Chester groups Coal measures represented by 300 species and varieties Permian Period represented by 40 species & varieties ... Mesozoic Time Triassic Period. variegated sandstone - shell limestone - red marls St Cassian beds represented by 100 species & varieties | Untitled Page 1Geological Collectin |