Modeling Sedimentary Deposits on the Continental Margin
نویسنده
چکیده
A first objective is to investigate the fabric (pattern) of seabed stratification on continental margins at small time and space scales (1 cm-50 cm depth into the seabed; 1 hr-3 yrs sedimentary record). To this end, we are testing the hypothesis that on muddy shelves such as the northern California shelf, Holocene event stratigraphy consists of the deposits of high-concentration storm regimes associated with river floods, alternating with deposits of low-concentration storm regimes. In order to conduct the test, we have developed several “deterministic” algorithms, in collaboration with our subcontractors, Alan Niedoroda and Chris Reed, at URL Greiner Woodward Clyde, Tallahassee. These algorithms, (EVENT, RESUSPEND, and TRANSPORT), that are driven directly by STRATAFORM and NOAA current meter records.
منابع مشابه
Oligocene to Holocene Mass-transport Deposits of the New Jersey Continental Margin and Their Correlation to Sequence Boundaries
The styles of soft-sediment deformation, mineralogy, and biostratigraphy of mass-transport deposits recovered from Leg 150 drill sites (902-906) provide important new information on the erosional and sedimentary history of the New Jersey continental slope and rise, and on the relationship of mass-wasting processes to changes in relative sea level. Nine distinct sedimentary facies are recognized...
متن کاملMiocene reversal of bottom water flow along the Pacific Margin of the Antarctic Peninsula: Stratigraphic evidence from a contourite sedimentary tail
A Fossil Mounded Sedimentary Body (MB) has been identified in the sedimentary record on the central continental rise west of Adelaide Island, on the Antarctic Peninsula Pacific margin. The growth patterns of the MB are defined through a detailed regional stratigraphic analysis using multichannel seismic reflection profiles. The MB has an elongated NE trend. It overlaps and continues to the NE o...
متن کاملReconnaissance Survey of the Irish Continental Shelf/Shelf Edge Atlantic Irish Regional Survey (AIRS) 1996 A GLORIA Survey of the Irish Continental Margin
The Atlantic Irish Regional Survey (AIRS96) sidescan sonar survey was carried out in August 1996. Covering an area of 200,000 km 2 it represented the largest reconnaissance seabed survey of the Irish Continental Shelf region. It covered both margins, together with much of the basin floor, of the Irish sector of the Rockall Trough and extended into the northern part of the Porcupine Seabight. Th...
متن کاملSediment distribution and sedimentary processes across the Antarctic Wilkes Land margin during the Quaternary
The study of existing cores collected across the Wilkes Land margin provides us with a better understanding of the sediment distribution and processes across this margin during the Holocene, and during Pleistocene glacial and interglacial cycles. Holocene depositional rates are high in deep (>1000m) inner-shelf basins where diatomaceous ooze is deposited at estimated minimum sedimentation rates...
متن کاملSediment Formation in Nearshore Environments: Strength, Rheology, Microstructure, and Stability
Our goals are to understand how geotechnical and physical properties develop in marine sedimentary deposits on continental margins and how these properties influence sediment transport processes and the development of geomorphology. Our studies include predicting stability of sediment on the continental shelf and slope, providing input parameters for models of sediment transport and deformation...
متن کامل