Stone is a single
monograptus
Graptolites class (primitive chordates associated with small groups of aquatic animals) of the extinct genus. Marine fossils found in the Silurian. Is the most common Silurian graptolites are characterized by a unique structural feature of a single branch. Is diplograptids genus (diplograptus) descent. There are several known types or species, separated by long distances for comparison Silurian Silurian strata and subdivision blog. |
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