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Geobulletin
alpha
News from the Geoblogosphere
by Stratigraphy.net
New from Snet:
Lithologs
, a new tool to create lithological/sedimentological logs online..
Blog post recommendation
Placopecten clintonius pelecypod from the Yorktown formation of Virginia
This shell was among a number of
Chesapectin jeffersonius
specimens and it caught my eye due to the difference. A little research leads me to believe that this is a
Placopecten clintonius
pelecypod as it exists within the Yorktown formation at the same horizon as
C. jeffersonius
. The shell is smaller than
C. jeffersonius
and the radial ribs are both more numerous and finer.
This specimen came from the Yorktown Formation, which is Neogene in age (Pliocene epoch, Zanclean stage), along the James River in Virginia.
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