(Table T1) Depths and ages of datum levels at ODP Leg 182 sites
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2002
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| _version_ | 1867169996363268096 |
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| author | Brunner, Charlotte A Andres, Miriam S Holbourn, Ann E Siedlecki, S Brooks, Gregg R Molina-Garza, Roberto S Fuller, Michael D Ladner, Bryan Hine, Albert C Li, Qianyu |
| author_facet | Brunner, Charlotte A Andres, Miriam S Holbourn, Ann E Siedlecki, S Brooks, Gregg R Molina-Garza, Roberto S Fuller, Michael D Ladner, Bryan Hine, Albert C Li, Qianyu |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The first and last appearances of Quaternary planktonic foraminifers in the Great Australian Bight were evaluated using datum levels from magnetostatigraphy, oxygen isotope stratigraphy, and calcareous nannofossil biostratigraphy to determine whether they were synchronous or diachronous with open-ocean biostratigraphic events. The first appearance of Globorotalia truncatulinoides is diachronous at 1.6-1.7 Ma at Site 1127 and 1.1-1.2 at Sites 1129 and 1132, similar to other local appearances in high latitudes. All other datum levels, however, are synchronous with open-ocean events, including the first appearance of Globorotalia hirsuta and the last appearances of Globorotalia tosaensis and pink Globigerinoides ruber in the Indo-Pacific region. A local reappearance of Gt. hirsuta at ~0.12 Ma and the disappearance of Globorotalia crassaformis at ~0.10 Ma were found to be useful for local biostratigraphy. Age control at the bottom of all of the sections is poor at this time, but results suggest that sedimentation recommenced starting at ~1.9 Ma above the regional unconformity that marks the base of seismostratigraphic Sequence 2. Sediment accumulation is distinctly reduced in the lower Pleistocene compared to the upper Pleistocene, perhaps in part because of processes associated with several omission surfaces. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_785925 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table T1) Depths and ages of datum levels at ODP Leg 182 sites Brunner, Charlotte A Andres, Miriam S Holbourn, Ann E Siedlecki, S Brooks, Gregg R Molina-Garza, Roberto S Fuller, Michael D Ladner, Bryan Hine, Albert C Li, Qianyu 182-1127B; 182-1129C; 182-1130A; 182-1131A; 182-1132B; Age model; Age model, optional; Ageprofile Datum Description; Ageprofile Datum Type; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Error, absolute; Event label; Great Australian Bight; Joides Resolution; Latitude of event; Leg182; Longitude of event; Ocean Drilling Program; ODP; Reference/source; Sample comment The first and last appearances of Quaternary planktonic foraminifers in the Great Australian Bight were evaluated using datum levels from magnetostatigraphy, oxygen isotope stratigraphy, and calcareous nannofossil biostratigraphy to determine whether they were synchronous or diachronous with open-ocean biostratigraphic events. The first appearance of Globorotalia truncatulinoides is diachronous at 1.6-1.7 Ma at Site 1127 and 1.1-1.2 at Sites 1129 and 1132, similar to other local appearances in high latitudes. All other datum levels, however, are synchronous with open-ocean events, including the first appearance of Globorotalia hirsuta and the last appearances of Globorotalia tosaensis and pink Globigerinoides ruber in the Indo-Pacific region. A local reappearance of Gt. hirsuta at ~0.12 Ma and the disappearance of Globorotalia crassaformis at ~0.10 Ma were found to be useful for local biostratigraphy. Age control at the bottom of all of the sections is poor at this time, but results suggest that sedimentation recommenced starting at ~1.9 Ma above the regional unconformity that marks the base of seismostratigraphic Sequence 2. Sediment accumulation is distinctly reduced in the lower Pleistocene compared to the upper Pleistocene, perhaps in part because of processes associated with several omission surfaces. |
| title | (Table T1) Depths and ages of datum levels at ODP Leg 182 sites |
| topic | 182-1127B; 182-1129C; 182-1130A; 182-1131A; 182-1132B; Age model; Age model, optional; Ageprofile Datum Description; Ageprofile Datum Type; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Error, absolute; Event label; Great Australian Bight; Joides Resolution; Latitude of event; Leg182; Longitude of event; Ocean Drilling Program; ODP; Reference/source; Sample comment |
| url | https://doi.org/10.1594/PANGAEA.785925 |