1. http://woodshole. er. usgs

2. Seybold, Hansjörg, José S. Andrade, and Hans J. Herrmann
Seybold, Hansjörg, José S. Andrade, and Hans J. Herrmann. "Modeling river delta formation." Proceedings of the National Academy of Sciences 104, no. 43 (2007):
Seybold et al 2007

3. Ganges-Brahmaputra
Image by NASA

4. Goodbred, 1999

5. Conceptual Model of G-B Subaqueous Delta
Showing Subaqueous Delta and Sediment
Transport to Submarine Canyon
Kuehl, Steven A., et al. "Subaqueous delta of the Ganges-Brahmaputra river system." Marine Geology (1997):
Modified form Kuehl et al 1997

6. Borehole Drilling Photos from Goodbred, 1999
Goodbred, Steven 1999 Sediment dispersal and sequence development along a tectonically active margin: Late Quaternary evolution of the Ganges-Brahmaputra River delta. Unpublished Ph.D. Thesis, The College of William and Mary (VIMS)
Photos from Goodbred, 1999

7. Delta Plain Peat Basin / Bil TOP 1 meter BOTTOM
Photos from Goodbred, 1999

8. G-B Coastal Plain Stratigraphy
Umitsu (1993) –
3460
– 2120 10
– 7382 20
Thick, trangressive coastal-plain sequence formed during early Holocene
– 8238 30
– 8374 –
9906
– 7703
depth (m) 40
14,004 50
– 9219 60
• lowstand laterite and alluvial valley
• initial delta formation ~11-12 ka is years earlier than other delta systems
• 20-m-thick coastal mangrove sequence persists for years.....maintaing relative shoreline stability during rapid sea-level rise
• with sea-level deceleration in mid-Holocene, rivers infilled accommodation, old channels abandoned and began to migrate, depositing sandy channel deposits over the coastal plain 70
clay
silt
fine sand
medium sand 80 90
– = calibrated 14C age
Goodbred, 1999

9. Goodbred, 1999

10. Ganges-Brahmaputra Sediment Budgets (based on 1  109 t/yr discharge)
Floodplain /
Delta Plain
Subaqueous Delta
Canyon /
Off-shelf
Topset
Foreset
Modern: % % %3 ? 29%
Mid Holocene: %4 42% ? 26% (post-7000 cal BP)
Early Holocene: % ? 30% ( ,000 cal BP)
data sources: 1 Goodbred and Kuehl, 1998; 2 Allison, 1998; 3 Michels et al., 1998; 4 Goodbred and Kuehl, 1999; 5 Kuehl et al., 1997; 6 Goodbred and Kuehl, in press.

11. Goodbred, 1999