11-1/2" Utah Septarian Bookends Agate Bookends pyrite gives off sparks

pyrite gives off sparks

amphibians and all other life in those wetlands (bogs) were suffocated by the ash and immediately there began a permineralization / petrification process

Some Megalodon teeth have been measured over 7" in length

At the time

low and heavy heads

11-1/2" Utah Septarian Bookends Agate Bookends pyrite gives off sparksThese strange and handsome Geodes are from the Henry Mountains of Utah. Originally formed in an ancient sea floor some 50 70 million years ago, sediment collected around sea life as they decomposed, forming a concretion. Calcium carbonate from the shells of these creatures began to take a new form over time, creating calcite crystals and bands of aragonite. As the oceans receded, these mud balls hardened, shrinking and cracking in the sun. The gold