Outcrop 11. Tres Pasos Formation Slope Deposits Overview, Rio Zamora Canyon
B.W. Romans, A. Fildani, S.M. Hubbard, 2009. "Outcrop 11. Tres Pasos Formation Slope Deposits Overview, Rio Zamora Canyon", 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: very difficult - Overview accessibility: easy Outcrop Coordinates: 50.8166°S, 72.6947°W Refer to outcrop 11 on location map
Outcrops of the Tres Pasos and Dorotea formations in northern Ultima Esperanza District highlighted in this field guide (outcrops 10, 12, and 15) are remote and extremely difficult to access. One way to appreciate the general characterstics of the strata is from a distance along a dirt road on the west side of the north-south flowing Rio Zamora, which has carved a canyon into the Tres Pasos Formation and upper Cerro Toro Formation. From within the boundaries of Parque Nacional Torres del Paine, take the road to “Laguna Azul” and continue heading north (Fig. 11.1A) (note: at the time of publication, this road went through private land with unlocked gates; please always respect private land and communicate your intentions to stay on road and view outcrops from afar). The outcrops are on the other side of Rio Zamora from this road; do not attempt to cross the river. From north to south, the outcrop belt straddles three mountains: Cerro Divisadero, Cerro Mirador, and Sierra Contreras. Abundant paleocurrent data from the Tres Pasos Formation in this area indicate that basinward was to the south-southeast (Shultz et al., 2005; Romans et al., 2008). The transect displayed in this river canyon is therefore generally parallel to depositional dip, providing an opportunity to see a dip-parallel slope cross-section. Some east-west tributary
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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.