Asteroidea Mortality Plate w/ Stand Pyrite

Asteroidea Mortality Plate w/ Stand PyriteSea levels were at their highest levels of the Paleozoic Era during the Ordovician Period and saw water temperatures of more than 110 F. These conditions allowed marine life to flourish and led to wide diversification. It is during this time that sea stars (from the class Asteroidea) and brittle stars (from the class Ophiuroidea) diverged. Sea stars, or starfish, tend to have legs that are wider and more connected to one another. They had tubular feet

gathering tiny organisms for nourishment

Since copper is a non-ferrous metal

Fluorite is mined for a variety of industrial uses

forested with primitive plants

Common known types of beryl include Aquamarine

These bacteria are credited for the creation of most of the Earth's oxygen

and the Spanish word for sea

similarly to agate

Chelicerata

and large in size

found mainly in massive form and in colors ranging from blue to green

They survived long after many other large mammals in that time period by changing their diet