Lituites marshi (Hall, 1867) ammonoid fossil found in Louisville, Kentucky USA. It dates to the Silurian Period and was probably found in ...

  This image shows a Halysites catenularia (Linnaeus, 1767) chain coral fossil. It dates to the Silurian Period and was found Kentucky US...

This image shows a Favosites goldfussi (Larmarck, 1816) coral fossil. It dates to the Devonian Period and was found at Gerolstein Germany....