Crustal structure of the Southeast Georgia embayment-Carolina trough: Preliminary results of a composite seismic image of a continental suture ( ) and a volcanic passive margin

Journal Article · Mon Oct 01 00:00:00 EDT 1990 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1990)018<1023:CSOTSG>2.3.CO;2· OSTI ID:6356752

Austin, Jr, J A; Stoffa, P L; Phillips, J D ^[1]; Oh, Jinyong ^[2]; Sawyer, D S ^[3]; Purdy, G M; Reiter, E ^[4]; Makris, J ^[5]

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1. Univ. of Texas Institute for Geophysics, Austin (USA)
2. Univ. of Texas, Austin (USA)
3. Rice Univ., Houston, TX (USA)
4. Woods Hole Oceanographic Institution, MA (USA)
5. Universitaet Hamburg, Bundesstrasse, Hamburg (West Germany)

New deep-penetration multichannel seismic reflection data, combined with refraction results and magnetics modeling, support a hypothesis that the Carolina trough is a Mesozoic volcanic passive margin exhibiting a seaward-dipping wedge and associated underplating. The structure of Carolina platform continental crust is consistent with the late Paleozoic continental collision that produced the Appalachians, but imbrication has had no obvious effect on shallower structures produced by Mesozoic extension and volcanism. The origin of prominent magnetic anomalies crossing the Southeast Georgia embayment can be explained by processes attending Mesozoic separation of Africa and North America, and is not related to a Paleozoic continental suture, as previously postulated.

• OSTI ID: 6356752
• Journal Information: Geology; (USA), Journal Name: Geology; (USA) Vol. 18:10; ISSN GLGYB; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
APPALACHIAN MOUNTAINS
CONTINENTAL CRUST
DATA ANALYSIS
EARTH CRUST
FEDERAL REGION IV
GEOLOGIC AGES
GEOLOGIC FORMATIONS
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGIC STRUCTURES
GEOLOGY
GEOMORPHOLOGY
GEOPHYSICAL SURVEYS
MAGNETIC SURVEYS
MESOZOIC ERA
MOUNTAINS
NORTH AMERICA
OPTICAL PROPERTIES
ORIGIN
PHYSICAL PROPERTIES
PLATE TECTONICS
REFLECTIVITY
REFRACTIVITY
SEISMIC SURVEYS
SOUTH CAROLINA
SURFACE PROPERTIES
SURVEYS
TECTONICS
USA
VOLCANISM