A Late What Is It Wednesday Entry

We have a late “What Is It Wednesday” entry this week, but this time we’re seeking your help.  We’re not certain what we’re looking at this time.

ChesapequeMystery
Scale bar in millimeters.

These specimens were recovered from the Chesapeake Bay area in 1994 by Laurie Anderson.  They’re from the Rushmore Member of the Yorktown Formation, a Pliocene marine unit.

The largest are approximately 14.0 mm in length.  They’re boomerang-shaped overall, but cup inward on the concave side.  They resemble tiny jai alai cestas.

They appear to have grown concentrically as there are apparant growth lines on the convex surface.

If you’ve seen something like this before or know what they are, please comment, as we’re stumped.

Thanks!

Advertisements

2 thoughts on “A Late What Is It Wednesday Entry

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s