I found this clam in the Pennsylvanian, Winterset limestone of Kansas City, Jackson county Missouri. Found in a spot I had previously not been to but a spot I will definatly go back to! As a matter of fact, I will swing by there on the way home from work today and take some pictures of the cut! It is a massive exposure and Missourian tells me it is a complete section of the Winterset. I like this little clam because it is not the usual dirty brown and yellow color of most of my finds in the Win