07617 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Basilosaurus Teeth Reedops sp: Fossilworks (Paleobiology Database)

Reedops sp: Fossilworks (Paleobiology Database)

Specifically this specimen comes from the Hell Creek Formation

Horns are prepared as free standing

Eremiasaurus heterodontus

we provisionally denote the Polish and Maastricht specimens as “ Mosasaurus ( Leiodon ) cfr

07617 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Basilosaurus Teeth Reedops sp: Fossilworks (Paleobiology Database)Orthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K feldspar.