The interpretation of approximately 100 km of EM12 multibeam bathymetry and backscatter data together with high resolution TOPAS profiles obtained during a transit over the Orinoco deep-sea fan, near the Barbados accretionary prism, shows that the braided drainage pattern seen on GLORIA images by Belderson et al. (1984) corresponds to wide (similar to 10 km), low relief (<5 m) channels, incised by numerous small (similar to 500 m wide, similar to 1 m relief) erosional notches. However, the new data indicate that what was originally described as a braided system, actually is a complex depositional system composed of sinuous channels, braided channels and depositional lobes, which co-exist in a short distance, and are easily transformed in each other in response to changes in the flux power. (C) 1998 Elsevier Science B.V. All rights reserved.
New high-resolution data from the "braided system" of the Orinoco deep sea fan / Ercilla, G.; Alonso, B.; Baraza, J.; Casas, D; Chiocci, Francesco Latino; Estrada, F.; Farran, M.; Perez, F.; Pirmez, C.; Reeder, M.; Torres, J.; Urgeles, R.. - In: MARINE GEOLOGY. - ISSN 0025-3227. - 146:1-4(1998), pp. 243-250. [10.1016/S0025-3227(97)00134-5]
New high-resolution data from the "braided system" of the Orinoco deep sea fan
CHIOCCI, Francesco Latino;
1998
Abstract
The interpretation of approximately 100 km of EM12 multibeam bathymetry and backscatter data together with high resolution TOPAS profiles obtained during a transit over the Orinoco deep-sea fan, near the Barbados accretionary prism, shows that the braided drainage pattern seen on GLORIA images by Belderson et al. (1984) corresponds to wide (similar to 10 km), low relief (<5 m) channels, incised by numerous small (similar to 500 m wide, similar to 1 m relief) erosional notches. However, the new data indicate that what was originally described as a braided system, actually is a complex depositional system composed of sinuous channels, braided channels and depositional lobes, which co-exist in a short distance, and are easily transformed in each other in response to changes in the flux power. (C) 1998 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
