1.9" Fossil Paralenorthis Sp Brachiopod In Matrix Valongo Formation Arouca Portugal Borealosuchus including two generally symmetrical valves

including two generally symmetrical valves that range in shape from rounded to oval

it naturally forms in volcanic rocks through hydrothermal processes

and there is evidence that its sturdy shells were even used as shelters to protect against the cold

despite mosasaurs typically being top predators of reptiles and fish

The coloration is caused by the presence of manganese in the mineral

1.9" Fossil Paralenorthis Sp Brachiopod In Matrix Valongo Formation Arouca Portugal Borealosuchus including two generally symmetrical valvesLocation: Valongo Formation, Arouca, Portugal Weight: 12. 9 Ounces Dimensions: 4. 4 Inches Long, 3. 9 Inches wide, 0. 6 Inches Thick (Matrix) Dimensions: 1. 9 Inches Long, 1. 6 Inches wide The item pictured is the one you will receive. Middle Ordovician Age, 470 Million Years Old. Paralenorthis sp is a genus of brachiopods belonging to the class Rhynchonellata, which are characterized by their bivalve like shells and are primarily found in marine