Imprint of a Dalmanites trilobite in a piece of Waldron Shale from Clark County, Indiana. This trilobite crawled the Earth during the Middle Silurian Period (about 428,000,000 to 418,000,000 years ago).
Sunday, November 28, 2010
Dalmanites Imprint
Imprint of a Dalmanites trilobite in a piece of Waldron Shale from Clark County, Indiana. This trilobite crawled the Earth during the Middle Silurian Period (about 428,000,000 to 418,000,000 years ago).