(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152
Microtektites have been recovered from three horizons in eight middle Eocene to middle Oligocene marine sediment sequences. Five of these occurrences are coeval and of latest Eocene age (37.5 to 38.0 million years ago); three are coeval and of early late Eocene age (38.5 to 39.5 million years ago);...
Main Authors: | , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
1983
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.772149 https://doi.pangaea.de/10.1594/PANGAEA.772149 |
id |
ftdatacite:10.1594/pangaea.772149 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.772149 2023-05-15T13:37:08+02:00 (Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 Keller, Gerta DHondt, Steven Vallier, Tracy L 1983 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.772149 https://doi.pangaea.de/10.1594/PANGAEA.772149 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1126/science.221.4606.150 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Sample code/label Sample code/label 2 DEPTH, sediment/rock Depth, top/min Depth, bottom/max Planktic foraminifera zone Nannofossil zone Drilling/drill rig Piston corer DSDP/ODP/IODP sample designation Leg10 Leg15 Leg17 Leg25 Leg31 RC09 Glomar Challenger Robert Conrad Deep Sea Drilling Project DSDP Supplementary Dataset dataset Dataset 1983 ftdatacite https://doi.org/10.1594/pangaea.772149 https://doi.org/10.1126/science.221.4606.150 2021-11-05T12:55:41Z Microtektites have been recovered from three horizons in eight middle Eocene to middle Oligocene marine sediment sequences. Five of these occurrences are coeval and of latest Eocene age (37.5 to 38.0 million years ago); three are coeval and of early late Eocene age (38.5 to 39.5 million years ago); and three are of middle Oligocene age (31 to 32 million years ago). In addition, rare probable microtektites have been found in sediments with ages of about 36.0 to 36.5 million years. The microtektite horizon at 37.5 to 38.0 million years can be correlated with the North American tektite-strewn field, which has a fission track age (minimum) of 34 to 35 million years and a paleomagnetic age of 37.5 to 38.0 million years. There is no evidence for mass faunal extinctions at any of the microtektite horizons. Many of the distinct faunal changes that occurred in the middle Eocene to middle Oligocene can be related to the formation of the Antarctic ice sheet and the associated cooling phenomena and intensification of bottom currents that led to large-scale dissolution of calcium carbonate and erosion, which created areally extensive hiatuses in the deep-sea sediment records. The occurrence of microtektite horizons of several ages and the lack of evidence for faunal extinctions suggest that the effects of extraterrestrial bolide impacts may be unimportant in the biologic realm during middle Eocene to middle Oligocene time. Dataset Antarc* Antarctic Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Antarctic Keller ENVELOPE(-58.406,-58.406,-62.073,-62.073) The Antarctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Sample code/label Sample code/label 2 DEPTH, sediment/rock Depth, top/min Depth, bottom/max Planktic foraminifera zone Nannofossil zone Drilling/drill rig Piston corer DSDP/ODP/IODP sample designation Leg10 Leg15 Leg17 Leg25 Leg31 RC09 Glomar Challenger Robert Conrad Deep Sea Drilling Project DSDP |
spellingShingle |
Event label Sample code/label Sample code/label 2 DEPTH, sediment/rock Depth, top/min Depth, bottom/max Planktic foraminifera zone Nannofossil zone Drilling/drill rig Piston corer DSDP/ODP/IODP sample designation Leg10 Leg15 Leg17 Leg25 Leg31 RC09 Glomar Challenger Robert Conrad Deep Sea Drilling Project DSDP Keller, Gerta DHondt, Steven Vallier, Tracy L (Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
topic_facet |
Event label Sample code/label Sample code/label 2 DEPTH, sediment/rock Depth, top/min Depth, bottom/max Planktic foraminifera zone Nannofossil zone Drilling/drill rig Piston corer DSDP/ODP/IODP sample designation Leg10 Leg15 Leg17 Leg25 Leg31 RC09 Glomar Challenger Robert Conrad Deep Sea Drilling Project DSDP |
description |
Microtektites have been recovered from three horizons in eight middle Eocene to middle Oligocene marine sediment sequences. Five of these occurrences are coeval and of latest Eocene age (37.5 to 38.0 million years ago); three are coeval and of early late Eocene age (38.5 to 39.5 million years ago); and three are of middle Oligocene age (31 to 32 million years ago). In addition, rare probable microtektites have been found in sediments with ages of about 36.0 to 36.5 million years. The microtektite horizon at 37.5 to 38.0 million years can be correlated with the North American tektite-strewn field, which has a fission track age (minimum) of 34 to 35 million years and a paleomagnetic age of 37.5 to 38.0 million years. There is no evidence for mass faunal extinctions at any of the microtektite horizons. Many of the distinct faunal changes that occurred in the middle Eocene to middle Oligocene can be related to the formation of the Antarctic ice sheet and the associated cooling phenomena and intensification of bottom currents that led to large-scale dissolution of calcium carbonate and erosion, which created areally extensive hiatuses in the deep-sea sediment records. The occurrence of microtektite horizons of several ages and the lack of evidence for faunal extinctions suggest that the effects of extraterrestrial bolide impacts may be unimportant in the biologic realm during middle Eocene to middle Oligocene time. |
format |
Dataset |
author |
Keller, Gerta DHondt, Steven Vallier, Tracy L |
author_facet |
Keller, Gerta DHondt, Steven Vallier, Tracy L |
author_sort |
Keller, Gerta |
title |
(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
title_short |
(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
title_full |
(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
title_fullStr |
(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
title_full_unstemmed |
(Table 1) Biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: Keller, Gerta; DHondt, Steven; Vallier, Tracy L (1983): Multiple microtektite horizons in upper Eocene marine sediments: no evidence for mass extinctions. Science, 221(4606), 150-152 |
title_sort |
(table 1) biostratigraphic zonation and core depth of microtektite occurrences in marine sediment sequences, supplement to: keller, gerta; dhondt, steven; vallier, tracy l (1983): multiple microtektite horizons in upper eocene marine sediments: no evidence for mass extinctions. science, 221(4606), 150-152 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1983 |
url |
https://dx.doi.org/10.1594/pangaea.772149 https://doi.pangaea.de/10.1594/PANGAEA.772149 |
long_lat |
ENVELOPE(-58.406,-58.406,-62.073,-62.073) |
geographic |
Antarctic Keller The Antarctic |
geographic_facet |
Antarctic Keller The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
https://dx.doi.org/10.1126/science.221.4606.150 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.772149 https://doi.org/10.1126/science.221.4606.150 |
_version_ |
1766088430597439488 |