Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 Chrome chalcedony Dimensions at widest points approximately

Dimensions at widest points approximately 100 mm x 60 mm x 50 mm thick

Dimensions at widest points approximately 90 mm x 80 mm x 70 mm deep

Dimensions at widest points approximately 135 mm x 95 mm x 8 mm  thick

Weighs 418 grams

DO174  Dendritic Opal slab

Polished fossil stromatolite. Pseudogymnosolenid type. DOG169 Chrome chalcedony Dimensions at widest points approximatelyDOG169 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. 80 mm x 70 mm x 7 mm thick. Weighs 99