20930 - Beautiful Malachite Crystals on Barite Matrix - Taouz Barite Mines (Morocco) Spinosaurus Bones fluvial-lacustrine (2)

fluvial-lacustrine (2)

Subfamily: Mosasaurinae Williston

and they were most likely amphibious  capable of living on land and in the sea

as well as very apt for teaching

Total: 10 collections each including a single occurrence

20930 - Beautiful Malachite Crystals on Barite Matrix - Taouz Barite Mines (Morocco) Spinosaurus Bones fluvial-lacustrine (2)Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and spaces, deep underground, where the water table and hydrothermal fluids provide the means for chemical precipitation. Individual crystals are rare but do occur as slender to acicular prisms. Pseudomorphs after