I think the red is pyritized part of the shell. Update: These last two pictures are of a brachiopod called Spinocyrtia.
Sunday, May 31, 2009
Brachiopod Paraspirifer bownockeri and Spinocyrtia
In addition to the New Albany Shale plants, brachiopods from Sylvania, Ohio (Lucas County) were brought in. These brachiopods have a really convex top shell that remind me of a shark fin. This one is called the Paraspirifer bownockeri found in the Silca Formation. It is from the Devonian period.
I think the red is pyritized part of the shell. Update: These last two pictures are of a brachiopod called Spinocyrtia.
I think the red is pyritized part of the shell. Update: These last two pictures are of a brachiopod called Spinocyrtia.
Nice clean up! the pyrite shows through very nicely. I think the third and fourth pictures are of Spinocyrtia. Look at the width of the interarea along the hinge on the back.
ReplyDeleteI just cleaned them with water and a toothbrush. Should I use white vinegar on these to bring out the pyrite?
ReplyDeleteThanks for the identification of the second brachiopod. I will update this entry soon to note that name.
Photo 3 is the only Spinocyrtia, not photo 4. That one is still a Paraspirifer, just not a robust one.
ReplyDelete