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What are five prehistoric small marine creatures?
Trilobites ranged in size from about half an inch to around two feet in length. Haikouicthys, one of the earliest known fish, was about an inch long. Ammonites ranged in size from around 9 inches to some species as large as 6.5 feet. Anamolocaris was a huge apex predator for its time, but by modern standards wasn't very large, only measuring three to six feet long. Rudists, a type of bivalve that was so common during the Cretaceous, piles of them formed reefs. They ranged from a few centimeters to over a meter in length, depending on the type.
What rocks have carbonate in them?
Limestone and dolomite are common rocks that contain carbonate minerals. These rocks form primarily from the accumulation of calcite or aragonite for limestone, and dolomite for dolomite, often from the remains of marine organisms.
Where is calcite found on earth?
Calcite is commonly found in sedimentary rocks, particularly limestone and marble. It can also be found in hydrothermal veins and geodes, as well as in some igneous rocks. Calcite can be found in various locations around the world, including the United States, Mexico, China, and Europe.
