This past week on Fossil Friday, I gave you a present from our Fossil Friend, Dan Coleman. As you recall, Dan had this to say about the Fossil...
"It is from the early Mississippian Buford limestone found in south-central Indiana. It was collected in a creek bed where tons of specimens wash out of the rock layers.This was/is in Lawrence County, Indiana, home of the famous limestone quarries that built many buildings and monuments, including the Empire State Building. Many different fossils and geodes are found here, including crinoids, brachiopods, and..."
and what? I asked!
"This specimen, I believe, is a horn coral geode. The exterior has eroded away, leaving the interior anatomy, which has been crystallized with calcite. What I found very interesting about this, and other specimens I have, is that it shows bilateral symmetry rather than radial."
What do you think? Do you think Dan was right?
