Weber, Michael E; Wiedicke-Hombach, Michael; Kudrass, Hermann-Rudolph; Hübscher, Christian; Erlenkeuser, Helmut (2011): Physical properties of 4 cores from the Bengal Fan [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.761573, Supplement to: Weber, ME et al. (1997): Active Growth of the Bengal Fan during sea-level rise and highstand. Geology, 25(4), 315-318, https://doi.org/10.1130/0091-7613(1997)025%3C0315:AGOTBF%3E2.3.CO;2
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Abstract:
New stratigraphic and high-resolution seismic data from the Bengal Fan indicate that the world's largest fan shows active growth during the most recent sea-level rise and the recent highstand. This unique phenomenon contradicts common sequence-stratigraphic models, and the sediment preserved provides new insight into the sedimentological response of a fan system to sea-level rise, climatic terminations, and monsoon intensity during the past climatic cycle. We present a detailed dated sequence of turbidite sedimentation based on a core transect perpendicular to the active channel-levee system in the upper mid-fan area. Between the two major terminations 1a (12 800 14C yr B.P.) and 1b (9700 14C yr B.P.), and especially at the end of the Younger Dryas, a 13-km-wide channel built up levees 50 m high. With decreasing sediment supply, continued sea-level rise, and increasing monsoon intensity during the early Holocene, turbidity currents were confined to the channel and gradually filled it. The canyon "Swatch of No Ground," a shelf depocenter that serves as the source for frequent turbidity currents, and the channel-levee system provide the unique opportunity for studying an active highstand system. Many fans showed this behavior only during lowered sea-level.
Coverage:
Median Latitude: 16.511040 * Median Longitude: 87.813958 * South-bound Latitude: 16.499000 * West-bound Longitude: 87.635170 * North-bound Latitude: 16.543830 * East-bound Longitude: 88.000500
Date/Time Start: 1994-02-15T10:49:00 * Date/Time End: 1994-02-16T07:45:00
Event(s):
SO93/3_117KL * Latitude: 16.502000 * Longitude: 87.635170 * Date/Time: 1994-02-15T10:49:00 * Elevation: -2617.0 m * Location: Bay of Bengal * Campaign: SO93/3 (BENGAL FAN) * Basis: Sonne * Method/Device: Piston corer (BGR type) (KL) * Comment: distal levee of active channel, fp down to 6m, then frequent black laminae
SO93/3_118KL * Latitude: 16.543830 * Longitude: 87.752330 * Date/Time: 1994-02-15T14:27:00 * Elevation: -2563.0 m * Location: Bay of Bengal * Campaign: SO93/3 (BENGAL FAN) * Basis: Sonne * Method/Device: Piston corer (BGR type) (KL) * Comment: young levee in main channel (infill), fp rare, some intercal. with fp
SO93/3_119KL * Latitude: 16.499000 * Longitude: 87.867830 * Date/Time: 1994-02-16T04:32:00 * Elevation: -2599.0 m * Location: Bay of Bengal * Campaign: SO93/3 (BENGAL FAN) * Basis: Sonne * Method/Device: Piston corer (BGR type) (KL) * Comment: middle levee position with mud waves, numerous thin turbidites; homog. 5,0-8,25 m
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (1996): Physical properties of sediment core SO93-117KL. https://doi.org/10.1594/PANGAEA.50086
- Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (1996): Physical properties of sediment core SO93-118KL. https://doi.org/10.1594/PANGAEA.50087
- Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (1996): Physical properties of sediment core SO93-119KL. https://doi.org/10.1594/PANGAEA.50088
- Weber, ME; Wiedicke-Hombach, M; Kudrass, H-R et al. (1996): Physical properties of sediment core SO93-120KL. https://doi.org/10.1594/PANGAEA.50089