This appears to be a Paraconularia magna fossil. It was found in the Cisco group Finis Shale of Jack County Texas. It is from the Pennsy...

The fossil shown here is an Mariacrinus carleyi crinoid calyx found in the Waldron Shale of Davidson County, Tennessee, USA. It was found...

This looks like a Peneroplis plantus foraminifera. It was found at Pago Beach on the island of Guam. Image is magnified 40 times under a ...