Pyrite/Quartz, Peru d67347ed575a06e2c7cd575b244d9183 They were so numerous that

They were so numerous that Triceratops teeth are the most commonly fossil found

containing trace elements of copper

As mentioned

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Pyrite/Quartz, Peru d67347ed575a06e2c7cd575b244d9183 They were so numerous thatA golden yellow to brown, widely occurring mineral sulfide, FeS2, Pyrite is used as an iron ore and to produce sulfur dioxide for sulfuric acid. It is also known as Fool's Gold because it resembles gold, even though it is harder (H. 5 6) and a paler yellow. Pyrite is often found in quartz veins, sometimes even with gold. Pyrite crystals are common; it may also occur as grains or in masses. It streaks a greenish black and when tarnished, may resemble