Seismic and chronostratigraphic results from SHALDRIL II, northwestern Weddell Sea
Open-File Report
2007-1047-SRP-094
By: J.B. Anderson, J. Wellner, S. Wise, S. Bohaty, P. Manley, T. Smith, F. Weaver, and D. Kulhanek
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Abstract
The 2006 SHALDRIL II cruise was conducted in the northwestern Weddell Sea, with primary drilling
targets in the James Ross Basin. A site drilled along the northern edge of the James Ross Basin sampled either latest
Eocene or earliest Oligocene deposits, providing a lower chronostratigraphic benchmark for our seismic stratigraphic
age model. Severe sea ice conditions forced abandonment of several of the James Ross Basin sites. Three alternate
sites were drilled along the southern flank of the Joinville Plateau. Seismic data from the area show a thick, southward
dipping stratigraphic succession with no conspicuous gaps. Three drill sites sampled this succession and recovered
Oligocene, middle Miocene, and early Pliocene strata overlain by a thin drape of Pleistocene deposits. The Pliocene-Miocene boundary appears to be represented by a disconformity within the cored interval. Otherwise, this is one of the
most complete post-Eocene successions anywhere on Antarctica and its adjacent margins
Suggested Citation
Anderson, J., Wellner, J., Wise, S., Bohaty, S., Manley, P., Smith, T., Weaver, F., and Kulhanek, D., 2007, Seismic and chronostratigraphic results from SHALDRIL II, northwestern Weddell Sea: U.S. Geological Survey Open-File Report 2007-1047-SRP-094, 4 p., https://doi.org/10.3133/ofr20071047SRP094.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Seismic and chronostratigraphic results from SHALDRIL II, northwestern Weddell Sea |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-094 |
| DOI | 10.3133/ofr20071047SRP094 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 4 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica |
| Additional Online Files (Y/N) | N |