Asteroidea Mortality Plate w/ Stand Pyrite found mainly in massive form

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

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

Fluorite is mined for a variety of industrial uses

Common known types of beryl include Aquamarine

similarly to agate

Asteroidea Mortality Plate w/ Stand Pyrite found mainly in massive formSea 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