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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.
Potsdam, Chazy, Trenton, Utica, Cincinnati or Hudson river Epochs
Medina, Clinton, Niagara, lower Helderberg, Oriskany Periods
represented by 700 species and varieties of fossils.
Corniferous, Hamilton, [illegible] Periods
represented by 180 sp & varieties
Kinderhook - Burlington - Keokuk - St Louis - Chester groups
represented by 300 species and varieties
represented by 40 species & varieties
... Mesozoic Time
variegated sandstone - shell limestone - red marls
St Cassian beds
represented by 100 species & varieties
Notes and Questions
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