It was a steamy tropical land south of the equator; swamps, mountains, high rainfall, a primal jungle teaming with the land-pioneers – insects. Amphibians came ashore to harvest the vegetation and insects and some evolved to stay on land. They were the very first vertebrates to colonise the land; lizard-like Tetrapods crawling and slithering through the mud. The high rain fall brought floods of silt from the mountains, quickly filling and burying the tracks of the Tetrapod.
David Rory ONeill 