Tarjados Formation

The formation was first defined by Romer and Jensen in 1966, based on a type section exposed in the Sierra de Los Tarjados. The Tarjados Formation, as the underlying Talampaya Formation, belongs to the Paganzo Group. The formation is exposed in the Talampaya National Park of La Rioja Province. The Tarjados Formation is overlain by the Chañares Formation, separated by a regional unconformity. The formation, reaching a maximum thickness of , comprises red to greenish grey sandstones, deposited in an eolian and playa-lacustrine to fluvial environment. The sediments were deposited under arid, or semi-arid conditions. == See also ==