Foraminiferal, lithic, and isotopic changes across four major unconformities at DSDP Hole 80-548A
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PANGAEA
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| Autori principali: | , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1985
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| _version_ | 1867170464900579328 |
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| author | Poag, C Wylie Reynolds, Leslie A Mazzullo, James M Keigwin, Lloyd D |
| author_facet | Poag, C Wylie Reynolds, Leslie A Mazzullo, James M Keigwin, Lloyd D |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Sediment samples taken at close intervals across four major unconformities (middle Miocene/upper Miocene, lower Oligocene/upper Oligocene, lower Eocene/upper Eocene, lower Paleocene/upper Paleocene) at DSDP-IPOD Site 548, Goban Spur, reveal that coeval biostratigraphic gaps, sediment discontinuities, and seismic unconformities coincide with postulated low stands of sea level. Foraminiferal, lithic, and isotopic analyses demonstrate that environments began to shift prior to periods of marine erosion, and that sedimentation resumed in the form of turbidites derived from nearby upper-slope sources. The unconformities appear to have developed where a water-mass boundary intersected the continental slope, rhythmically crossing the drill site in concert with sea-level rise and fall. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_807710 |
| institution | PANGAEA |
| language | en |
| publishDate | 1985 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Foraminiferal, lithic, and isotopic changes across four major unconformities at DSDP Hole 80-548A Poag, C Wylie Reynolds, Leslie A Mazzullo, James M Keigwin, Lloyd D 80-548A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg80; North Atlantic/SPUR Sediment samples taken at close intervals across four major unconformities (middle Miocene/upper Miocene, lower Oligocene/upper Oligocene, lower Eocene/upper Eocene, lower Paleocene/upper Paleocene) at DSDP-IPOD Site 548, Goban Spur, reveal that coeval biostratigraphic gaps, sediment discontinuities, and seismic unconformities coincide with postulated low stands of sea level. Foraminiferal, lithic, and isotopic analyses demonstrate that environments began to shift prior to periods of marine erosion, and that sedimentation resumed in the form of turbidites derived from nearby upper-slope sources. The unconformities appear to have developed where a water-mass boundary intersected the continental slope, rhythmically crossing the drill site in concert with sea-level rise and fall. |
| title | Foraminiferal, lithic, and isotopic changes across four major unconformities at DSDP Hole 80-548A |
| topic | 80-548A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg80; North Atlantic/SPUR |
| url | https://doi.org/10.1594/PANGAEA.807710 |