20929 - Beautiful Malachite Crystals on Barite Matrix - Taouz Barite Mines (Morocco) Mosasaur Jaws These irregularly-coiled ammonites are called

These irregularly-coiled ammonites are called heteromorph ammonites

It appears in the Akrabou formation

weakly developed facets and more or less clearly developed beading of the enamel

Bulletin 23:1–241

It comes from the wonderful middle Ordovician of the South of Morocco

20929 - Beautiful Malachite Crystals on Barite Matrix - Taouz Barite Mines (Morocco) Mosasaur Jaws These irregularly-coiled ammonites are calledMalachite 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