Heliophyllum agassizi? Horn Coral

Heliophyllum agassizi? horn coral fossil found in Jeffersonville Limestone from Jefferson County, Kentucky. Coral grew in the Middle Devonian Period.  The Heliophyllum is one of the common horn corals found in the area.

Thanks to Alan for help with the identification.

Pteranodon Flying Reptile Postage Stamp

Here are two cancelled U.S. postage stamps from 1989 depicting the flying reptile Pteranodon.  This stamp was part of four set with the other three featuring dinosaurs.  The Pteranodon roamed the skies of the Late Cretaceous period with its range extending over the states Alabama, Kansas, Nebraska, South Dakota, and Wyoming.

Earlier posts show the Tyrannosaurus stamp: HERE and Stegosaurus stamp HERE.

Pre-Cambrian Cyanobacteria

Kona Dolomite dated to over 2 billion years old. Thought to be a cyanobacteria colony (stromatolite). Found in the Kona Hills of Marquette County, Michigan. These early oxygen producers paved the way for more advanced lifeforms of the future.

These small pieces were cut from a larger piece that was sent to me.  They were then hand sanded using a variety of grit papers. Finally polished with the Dremel tool.