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September 2010 Volume 3 No 9

The Trezona Formation of South Australia pre-dates the 635-million-year-old Marinoan glaciation. Fossils found at this location are up to several millimetres in size, and share morphological characteristics with sponge-grade animals. The image shows the polished surface of a Trezona Formation limestone rock containing fossils. Image from: Maloof Lab/Situ Studio

Article p653; News & Views p597