Within it are several fossilized marine creatures from the Ordovician Period ... ostracods and crinoids. Almost all sedimentary rocks are formed by water erosion, grinding up rocks over thousands ...
Fieser, L. F., and Fieser, M., Natural Products Related to Phenanthrene (third ed.), 204 (Reinhold, New York, 1949). Fieser, L. F., and Fieser, M., Steroids, 177 ...
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