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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
Porphyry is a general term that is used rather loosely for igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass
Weighs 862 grams
A polished slab of Starry Jasper
TI206 Tiger Iron rough rock
IRR 123 Fossil stromatolite slab
Polished fossil stromatolite. Pseudogymnosolenid type. DOG165 asperia Porphyry is a general termDOG165 Fossil stromatolite slab, polished on one side. Superb museum quality specimen ! 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. 285