This month I paid a brief visit to the Besser Museum at Alpena, Michigan, USA. They had a large exhibit on Native American artifacts foun...

These two images depict a Hexagonaria sp. coral found in Jefferson County, Kentucky. It is from the Jeffersonville Limestone. Units on ru...

Here is a Hexagonaria sp. coral found in the Jeffersonville Limestone in Louisville Kentucky. The end needs to be polished to reveal more d...