Chronostratigraphy of sediments from the Bahamas
Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program (ODP) Leg 166 along a transect from the top of Great Bahama Bank to the basin in the Straits of Florida provide a unique data set to test the assumption in seismic stratigraphy that seismic reflections...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.744545 2023-05-15T17:37:02+02:00 Chronostratigraphy of sediments from the Bahamas Eberli, Gregor P Anselmetti, Flavio S Kroon, Dick Sato, Tokiyuki Wright, James D MEDIAN LATITUDE: 24.525278 * MEDIAN LONGITUDE: -79.278129 * SOUTH-BOUND LATITUDE: 24.399850 * WEST-BOUND LONGITUDE: -79.459200 * NORTH-BOUND LATITUDE: 24.641200 * EAST-BOUND LONGITUDE: -79.107000 * DATE/TIME START: 1996-02-28T00:00:00 * DATE/TIME END: 1996-04-08T00:00:00 2002-08-17 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.744545 https://doi.org/10.1594/PANGAEA.744545 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.744545 https://doi.org/10.1594/PANGAEA.744545 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Eberli, Gregor P; Anselmetti, Flavio S; Kroon, Dick; Sato, Tokiyuki; Wright, James D (2002): The chronostratigraphic significance of seismic reflections along the Bahamas Transect. Marine Geology, 185(1-2), 1-17, https://doi.org/10.1016/S0025-3227(01)00287-0 166-1003 166-1004 166-1005 166-1006 166-1007 COMPCORE Composite Core Joides Resolution Leg166 North Atlantic Ocean Ocean Drilling Program ODP Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.744545 https://doi.org/10.1016/S0025-3227(01)00287-0 2023-01-20T07:31:52Z Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program (ODP) Leg 166 along a transect from the top of Great Bahama Bank to the basin in the Straits of Florida provide a unique data set to test the assumption in seismic stratigraphy that seismic reflections are time lines and, thus, have a chronostratigraphic significance. Seismic reflections that are identified as seismic sequence boundaries (SSBs) were dated by means of biostratigraphy in the five ODP sites and by a combination of biostratigraphy, magnetostratigraphy and Sr isotope stratigraphy in the two BDP sites. The seismic reflection horizons are carried across a variety of facies belts from shallow-water carbonates over slope carbonates to drift deposits in the Straits of Florida. Within this system 17 SSBs were identified and dated. Despite the fact that the seismic reflections cross several facies belts, their ages remain remarkably constant. The average offset in all sites is 0.38 Myr. In no cases do the seismic reflections cut across time lines. The age differences are the combined result of the biostratigraphic sampling frequency, the spacing of marker species that required extrapolation of ages, and the resolution of the seismic data. In addition, uncertainties of age determination in the proximal sites where age-diagnostic fauna are rare add to the age differences between sites. Therefore, it can be concluded that the seismic reflections, which mark the SSBs along the Bahamas Transect, are time lines and can be used as stratigraphic markers. This finding implies that depositional surfaces are preferentially imaged by reflected seismic waves and that an impedance contrast exists across these surfaces. Facies successions across the sequence boundaries indicate that the sequence boundaries coincide with the change of deposition from times of high to low sea level. In the carbonate setting of Great Bahama Bank, sea-level changes produce changes in sediment composition, sedimentation rate and diagenesis from ... Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-79.459200,-79.107000,24.641200,24.399850) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
166-1003 166-1004 166-1005 166-1006 166-1007 COMPCORE Composite Core Joides Resolution Leg166 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
166-1003 166-1004 166-1005 166-1006 166-1007 COMPCORE Composite Core Joides Resolution Leg166 North Atlantic Ocean Ocean Drilling Program ODP Eberli, Gregor P Anselmetti, Flavio S Kroon, Dick Sato, Tokiyuki Wright, James D Chronostratigraphy of sediments from the Bahamas |
topic_facet |
166-1003 166-1004 166-1005 166-1006 166-1007 COMPCORE Composite Core Joides Resolution Leg166 North Atlantic Ocean Ocean Drilling Program ODP |
description |
Continuous cores drilled during the Bahamas Drilling Project (BDP) and the Ocean Drilling Program (ODP) Leg 166 along a transect from the top of Great Bahama Bank to the basin in the Straits of Florida provide a unique data set to test the assumption in seismic stratigraphy that seismic reflections are time lines and, thus, have a chronostratigraphic significance. Seismic reflections that are identified as seismic sequence boundaries (SSBs) were dated by means of biostratigraphy in the five ODP sites and by a combination of biostratigraphy, magnetostratigraphy and Sr isotope stratigraphy in the two BDP sites. The seismic reflection horizons are carried across a variety of facies belts from shallow-water carbonates over slope carbonates to drift deposits in the Straits of Florida. Within this system 17 SSBs were identified and dated. Despite the fact that the seismic reflections cross several facies belts, their ages remain remarkably constant. The average offset in all sites is 0.38 Myr. In no cases do the seismic reflections cut across time lines. The age differences are the combined result of the biostratigraphic sampling frequency, the spacing of marker species that required extrapolation of ages, and the resolution of the seismic data. In addition, uncertainties of age determination in the proximal sites where age-diagnostic fauna are rare add to the age differences between sites. Therefore, it can be concluded that the seismic reflections, which mark the SSBs along the Bahamas Transect, are time lines and can be used as stratigraphic markers. This finding implies that depositional surfaces are preferentially imaged by reflected seismic waves and that an impedance contrast exists across these surfaces. Facies successions across the sequence boundaries indicate that the sequence boundaries coincide with the change of deposition from times of high to low sea level. In the carbonate setting of Great Bahama Bank, sea-level changes produce changes in sediment composition, sedimentation rate and diagenesis from ... |
format |
Dataset |
author |
Eberli, Gregor P Anselmetti, Flavio S Kroon, Dick Sato, Tokiyuki Wright, James D |
author_facet |
Eberli, Gregor P Anselmetti, Flavio S Kroon, Dick Sato, Tokiyuki Wright, James D |
author_sort |
Eberli, Gregor P |
title |
Chronostratigraphy of sediments from the Bahamas |
title_short |
Chronostratigraphy of sediments from the Bahamas |
title_full |
Chronostratigraphy of sediments from the Bahamas |
title_fullStr |
Chronostratigraphy of sediments from the Bahamas |
title_full_unstemmed |
Chronostratigraphy of sediments from the Bahamas |
title_sort |
chronostratigraphy of sediments from the bahamas |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.744545 https://doi.org/10.1594/PANGAEA.744545 |
op_coverage |
MEDIAN LATITUDE: 24.525278 * MEDIAN LONGITUDE: -79.278129 * SOUTH-BOUND LATITUDE: 24.399850 * WEST-BOUND LONGITUDE: -79.459200 * NORTH-BOUND LATITUDE: 24.641200 * EAST-BOUND LONGITUDE: -79.107000 * DATE/TIME START: 1996-02-28T00:00:00 * DATE/TIME END: 1996-04-08T00:00:00 |
long_lat |
ENVELOPE(-79.459200,-79.107000,24.641200,24.399850) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Eberli, Gregor P; Anselmetti, Flavio S; Kroon, Dick; Sato, Tokiyuki; Wright, James D (2002): The chronostratigraphic significance of seismic reflections along the Bahamas Transect. Marine Geology, 185(1-2), 1-17, https://doi.org/10.1016/S0025-3227(01)00287-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.744545 https://doi.org/10.1594/PANGAEA.744545 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.744545 https://doi.org/10.1016/S0025-3227(01)00287-0 |
_version_ |
1766136748617760768 |