Ischigualasto Provincial Park is a natural park located in the north-east of the province of San Juan, north-western Argentina (30°S 68°W / 30°S 68°W), limiting to the north with the Talampaya National Park, in La Rioja. Both areas belong to the same geological formation, the Ischigualasto Formation, (sometimes Ischigualasto-Talampaya Formation).