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The most supported theory about these crests is that they served as visual displays
and minor metallic components are commonly present
at the end of the Cretaceous
an iron and magnesium-rich mineral that imparts their characteristic dark coloration and substantial density
serving as the primary mineral that countless invertebrates utilize to build their shells and skeletal structures
1.9" Fossil Paralenorthis Sp Brachiopod In Matrix Valongo Formation Arouca Portugal Insect The most supported theory aboutLocation: Valongo Formation, Arouca, Portugal Weight: 10. 1 Ounces Dimensions: 4. 8 Inches Long, 4. 1 Inches wide, 0. 7 Inches Thick (Matrix) Dimensions: 1. 9 Inches Long, 1. 2 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