Wave Dominated Deltas
Rio Grande - HST 1
The prograding reflection configuration, the elongate lens geometry, and the steep seaward margin of the unit support its interpretation as a wave-dominated delta. The elongate geometry and steep margin are interpreted as being formed due to wave erosion with re-deposition of sediment redistributed along strike by waves.
distributary channels
core data
seismic data
Overview
Main Characteristics
Width (km)
x
Length (km) |
Thickness (ms) |
Shape |
Reflection
Configuration |
Bounding
Surfaces |
Lithology |
Subbottom
Depth (m) |
| 75 x 15 |
~ 30 |
elongate
lens |
prograding clinoforms to
chaotic and shingled |
top - 5emfs |
SP-2, SP-3
SP-4, SP-5 |
20-45 |
Depositional Interpretation
| Interpretation |
Sediment
Volume (km3) |
Timing (ybp) |
Deposition Rate
per 1000 yrs |
Sea Level |
Eustatic vs
Climatic |
wave
dominated
delta |
8.14 |
104,2000
to
110,000 |
>1.40 km3 |
falling |
eustatic |
Sediment Yields
Volume = (4/3)*(Each isochron is divided into a series of spheroids whose volume is then summed (a * b* c, where a,b,c are radii).
| total volume (km3) |
deposition timing |
sediment yield (km3)
per 10000 yrs |
| 8.14 |
5800 |
1.40 |
Comments, questions? Contact us at
gulf@gulf.rice.edu.