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Trilobite Hash Plate Labeled

Posted by on November 24, 2013
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Caleb Scheer -

Caleb Scheer –

Tap image to make larger.

This is an exceptionally clear photo.

If you go to “View” and then “Zoom”, you can study it at 2-400% enlarged.

Hash Plate

Platteville Formation, Mifflin member

Middle Ordovician

Southwest Wisconsin

Dimensions roughly: 6in long, 3.5in wide, 1.5in thick

Weight: estimated 2lbs



From DeMolt's 1963 paper, trilobite graph redone by Caleb Scheer.

From DeMolt’s 1963 paper, trilobite graph redone by Caleb Scheer.


The orginal post on can be seen here:


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