* 195 million years -- time since beginning of Jurassic Period * 195 million years -- time since end of Triassic Period * 225 million years -- time since beginning of Triassic Period (beginning of Mesozoic Era) * 225 million years -- time since end of Permiam? Period (end of Palaeozoic Era) * 280 million years -- time since beginning of Permiam? Period * 280 million years -- time since end of Carboniferous Period |