. Contributions from the New York Botanical Garden. Plants. American Association of Museums 5i. This chart is based upon (1), an assumed age for the earth of 72,000,000 years, which is a fair average of the numerous estimates which have been made by geologists and physicists in this connection, and (2), the ratios between the several geologic time divisions as esti- mated by eminent geological authorities. The clock dial, representing the cosmic day, is divided into twenty- four hours, hence each hour is equivalent to 3,000,000 years of geo- logic time. The estimates of the geologic time divis
. Contributions from the New York Botanical Garden. Plants. American Association of Museums 5i. This chart is based upon (1), an assumed age for the earth of 72,000,000 years, which is a fair average of the numerous estimates which have been made by geologists and physicists in this connection, and (2), the ratios between the several geologic time divisions as esti- mated by eminent geological authorities. The clock dial, representing the cosmic day, is divided into twenty- four hours, hence each hour is equivalent to 3,000,000 years of geo- logic time. The estimates of the geologic time division ratios are: Pre-Paleozoic (Azoic and Eozoic) Time 12 Paleozoic Time 8 Mesozoic Time 3 Neozoic Time 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York Botanical Garden. New York : The Garden
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectplants, bookyear1899
