Crinoid Fossil Plate - SOLD 7.830" rockinaboxammonite Above: While there have been

Above: While there have been numerous extinction events scattered across time

31" Ordovician Ophiurida Brittle Star

This specimen is a mission-flown tile fragment from the Space Shuttle Challenger

066g cross-section of an Oviraptor bone fossil discovered on private land in the Hell Creek Formation of Montana

Crinoid Fossil Plate - SOLD 7.830" rockinaboxammonite Above: While there have beenCrinoids are an incredible group of aquatic animals that attach themselves to the seafloor and filter feeds with beautiful feathered arms. These creatures are echinoids, an ancient and varied group of life. Crinoids emerged in the fossil record over 541,000,000 years ago and some species still exist to this day. This specimen is a 7. 830" crinoid fossil plate that dates to about 380,000,000 years old. The fossil shows the animal's stem, calyx, and