Permian, 260 Ma

Piracicaba, Brazil, cycads, ginkgos, conifers, seed ferns, ....  Amniotes have taken the place of amphibians, age of Dimetrodon ...

The location at Piracicaba used to be a sea with islands, not too far from land, molluscs, fragmented fish and plant remains are most found, a claystone, mudstone layering of cliffs at the edge of the river, with an age to approx 260 Ma, +- 5 Ma.  

Seeing Varvito in Itu, state of Sao Paulo, timeperiod 270-280 Ma, Brazil was partly covered with icecaps, both locations were shallow, calm, cold seas, small molluscs, crustaceans, fish, pollen and plant remains were calmly settled in clay, mud, silt eventually turning into clay-, silt- and mudstone layers.  Where as in Varvito the layers represent a one year cycle , with dark and light yearly deposits, representing winter and summer.