The area is part of the Adelaide Geosyncline. Steinmann interpreted ophiolites using the geosyncline concept. It is in the Adelaide Geosyncline. It was earlier known as Lachlan Geosyncline. The Flinders Ranges are composed largely of folded and faulted sediments of the Adelaide Geosyncline. The Flinders Ranges are largely composed of folded and faulted sediments of the Adelaide Geosyncline. Steinmann himself interpreted ophiolites (the Trinity) using the geosyncline concept. As a geosyncline depression originated uplifted geanticlines were eroded providing sediments that filled the basin. John F.Dewey and John M.Bird adapted the geosyncline concept to plate tectonics in 1970. Haug actualized the geosyncline concept and "reintroduced" it to Europe with a 1900 publication.