sentences:  It is interpreted to be latest Kimmeridgian in age.The Praia Azul Member, formerly known as the Sobral unit/member is 80 to 130 metres thick and consists of tabular marls and mudstones, with rare sandstones bodies.There are three distinct laterally extensive (>20 km) thin shelly carbonate horizons within this member, indicating brief marine transgressions.South of Santa Cruz primarily consists of sandstone with rare conglomerate.