Polished fossil stromatolite . Carnegia wongawolensis CAR102. stromatolite 190 mm x 90 mm

190 mm x 90 mm x 10 mm thick

Queensland

7 billion years

The clinozoisite has replaced but retained the shape of plagioclase feldspar crystals

4 billion years

Polished fossil stromatolite . Carnegia wongawolensis CAR102. stromatolite 190 mm x 90 mmCAR102. Fossil stromatolite slab, polished on one side. Carnegia wongawolensis. These rare stromatolites are from the Windidda Formation, Earaheedy Group, Western Australia. They usually occur as weathered out nodules formed by branched, irregular columns. The environment they grew in was possibly freshwater algal marshes. Location is near the town of Wiluna, Western Australia. Age is Palaeoproterozoic (1. 6 to 2. 5 billion years). Approx. 210 mm x 70