Polished fossil stromatolite. Pseudogymnosolenid type. DOG163 annular rings 2 billion years

2 billion years

Dimensions at widest points approximately 140 mm x 80 mm x 8

Weighs 300grams

TI212   Tiger Iron slab

grinding or polishing as the matrix holding the pisolites (small round pebbles) is in many cases quite soft

Polished fossil stromatolite. Pseudogymnosolenid type. DOG163 annular rings 2 billion yearsDOG163 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 65 mm x 7 mm thick. Weighs