Polished fossil stromatolite. Pseudogymnosolenid type. DOG167 polished magneprase 5 mm thick at widest

5 mm thick at widest points

Bauxite is the main raw material used in the commercial production of aluminium

Desert Sunset is a banded iron formation that is comprised of alternating layers of red and yellow jasper and chert with narrow bands of black hematite

Dimensions at widest points approximately 185 mm x 120 mm x 7

Dimensions at widest points approximately 115 mm x 100  mm x 18 mm thick

Polished fossil stromatolite. Pseudogymnosolenid type. DOG167 polished magneprase 5 mm thick at widestDOG167 Fossil stromatolite slab, polished on one side. An as yet unidentified stromatolite, form of Pseudogymnosolenid type. The stromatolite occurs as small digitate columns which are finely laminated. It probably grew in shallow water conditions with intermittent subaerial exposure. From an unassigned unit of the Wyloo Group. Age is approx. 1. 8 billion years. From south west of Newman Western Australia. Approx. 145 mm x 60 mm x 8. 5 mm thick.