Ice Age Horse Leg Meteorite Tridacna gigas

Tridacna gigas

or Spirit Quartz

as it is used to make drilling mud (used in oil well drilling)

Today this rugged and remote region of southeastern Nevada is prized for these beautiful and rare opalized specimens

Agates were named after the Acate River in Sicily where the stones were originally found

Ice Age Horse Leg Meteorite Tridacna gigasEquus caballus (or Equus ferus) evolved in North America during the Pleistocene, spreading to Eurasia via the Bering land bridge before going extinct in North America around 10,000 years ago. As a key member of the Pleistocene megafauna, they adapted to varying environments, with several species dominating Eurasia by the Late Pleistocene.