Outcrop 15. Transition from Deep-Water to Shelf Edge Deposits,Tres Pasos and Dorotea Formations, Cerro Escondido
J.A. Covault, B.W. Romans, S.A. Graham, 2009. "Outcrop 15. Transition from Deep-Water to Shelf Edge Deposits,Tres Pasos and Dorotea Formations, Cerro Escondido", Stratigraphic Evolution of Deep-Water Architecture: Examples of controls and depositional styles from the Magallanes Basin, southern Chile, Andrea Fildani, Stephen M. Hubbard, Brian W. Romans, J.A. Covault, W.H. Crane, A. Bernhardt, Z.R. Jobe, D.A. Armitage, J.C. Fosdick, M.R. Shultz, J. Clark, D.R. Lowe, S.A. Graham
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Outcrop accessibility: extremely difficult Outcrop Coordinates: 50.7309°S, 72.6324°W Refer to outcrop 15 on location map
The stratigraphic section at Cerro Escondido contains the most complete exposure of the Dorotea Formation in the Ultima Esperanza District (Fig. 15.1). Cerro Escondido is located south of the Argentina-Chile border on an anticline between the Rio de las Chinas and the Rio Zamora (refer to outcrop location map). The contact between the Tres Pasos and Dorotea formations had not been formally mapped at Cerro Escondido, and we define it as the first contact between turbidites of the Tres Pasos Formation and overlying shallow-marine hummocky-cross stratified sandstone of the Dorotea Formation (Fig. 15.1). Greater than 300 m of stratigraphy are exposed across >800 m of the Cerro Escondido outcrop (Fig. 15.1). Two stratigraphic sections were recorded at cm-scale resolution (295 m thick in the east and 197 m thick in the west; Fig. 15.1C).
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Stratigraphic Evolution of Deep-Water Architecture: Examples of controls and depositional styles from the Magallanes Basin, southern Chile
This large format (11 × 17 inch) all color outcrop atlas and field guide was produced for the SEPM Research Conference held in Chile in February, 2009. It contains a wealth of information on the world class deep water outcrops of the Cretaceous of the Magallanes Basin in the Ultima Esperanza District, Chilean Patagonia. This book covers the significant outcrops in the region the Punta Barrosa Formation, CerroToro Fm., and the Tres Pasos Fm.