Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ...
Upper Eocene microspherules (microtektites and microkrystites) have been found in deep-sea sediments from the western North Atlantic, Caribbean, Gulf of Mexico, equatorial Pacific, and eastern equatorial Indian Ocean. Recent studies proposed that there are three or four microspherule layers: the Nor...
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ftdatacite:10.1594/pangaea.702680 2024-09-15T18:23:52+00:00 Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... Wei, Wuchang 1995 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.702680 https://doi.pangaea.de/10.1594/PANGAEA.702680 en eng PANGAEA https://dx.doi.org/10.1016/0031-0182(95)00075-w Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Event label DEPTH, sediment/rock Depth, top/min Depth, bottom/max Sample code/label Sample code/label 2 Ageprofile Datum Description Comment Drilling/drill rig DSDP/ODP/IODP sample designation Leg10 Leg17 Leg22 Leg31 Leg61 Leg95 Glomar Challenger Deep Sea Drilling Project DSDP dataset Supplementary Dataset Dataset 1995 ftdatacite https://doi.org/10.1594/pangaea.70268010.1016/0031-0182(95)00075-w 2024-08-01T10:55:41Z Upper Eocene microspherules (microtektites and microkrystites) have been found in deep-sea sediments from the western North Atlantic, Caribbean, Gulf of Mexico, equatorial Pacific, and eastern equatorial Indian Ocean. Recent studies proposed that there are three or four microspherule layers: the North American microtektite and microkrystite couplet in chron C15, and one (or two) significantly older layer(s) in chron C16 in DSDP Sites 216, 292 and 612. Based on calcareous nannofossil biochronologic and morphometric data, I suggest that the microspherules in the latter sites correlate with the North American microtektite-microkrystite couplet. My results as well as previously published data are all compatible with the model of one couplet of microtektites-microkrystites. The inference of three or four microspherule layers in the upper Eocene is shown to be an artifact of interpretation. ... : Microspherule depths in Sites 17-167, 22-216, 31-292, and 61-462 are modified from Glass et al. (1985) to comform with DSDP depth format; microspherule depth in Site 95-612 is from Glass (1989). The last occurrence of Discoaster saipanensis is 34.0 +/- 0.2 Ma and that of Chiasmolithus grandis is 37.0 +/- 0.2 Ma in the geomagnetic polarity time scale of Cande and Kent (1992). The last occurrence of Reticulofensestra reticulata (34.8 +/- 0.2 Ma) is at 157 m in Site 95-612. ... Dataset North Atlantic DataCite |
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Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label DEPTH, sediment/rock Depth, top/min Depth, bottom/max Sample code/label Sample code/label 2 Ageprofile Datum Description Comment Drilling/drill rig DSDP/ODP/IODP sample designation Leg10 Leg17 Leg22 Leg31 Leg61 Leg95 Glomar Challenger Deep Sea Drilling Project DSDP |
spellingShingle |
Event label DEPTH, sediment/rock Depth, top/min Depth, bottom/max Sample code/label Sample code/label 2 Ageprofile Datum Description Comment Drilling/drill rig DSDP/ODP/IODP sample designation Leg10 Leg17 Leg22 Leg31 Leg61 Leg95 Glomar Challenger Deep Sea Drilling Project DSDP Wei, Wuchang Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
topic_facet |
Event label DEPTH, sediment/rock Depth, top/min Depth, bottom/max Sample code/label Sample code/label 2 Ageprofile Datum Description Comment Drilling/drill rig DSDP/ODP/IODP sample designation Leg10 Leg17 Leg22 Leg31 Leg61 Leg95 Glomar Challenger Deep Sea Drilling Project DSDP |
description |
Upper Eocene microspherules (microtektites and microkrystites) have been found in deep-sea sediments from the western North Atlantic, Caribbean, Gulf of Mexico, equatorial Pacific, and eastern equatorial Indian Ocean. Recent studies proposed that there are three or four microspherule layers: the North American microtektite and microkrystite couplet in chron C15, and one (or two) significantly older layer(s) in chron C16 in DSDP Sites 216, 292 and 612. Based on calcareous nannofossil biochronologic and morphometric data, I suggest that the microspherules in the latter sites correlate with the North American microtektite-microkrystite couplet. My results as well as previously published data are all compatible with the model of one couplet of microtektites-microkrystites. The inference of three or four microspherule layers in the upper Eocene is shown to be an artifact of interpretation. ... : Microspherule depths in Sites 17-167, 22-216, 31-292, and 61-462 are modified from Glass et al. (1985) to comform with DSDP depth format; microspherule depth in Site 95-612 is from Glass (1989). The last occurrence of Discoaster saipanensis is 34.0 +/- 0.2 Ma and that of Chiasmolithus grandis is 37.0 +/- 0.2 Ma in the geomagnetic polarity time scale of Cande and Kent (1992). The last occurrence of Reticulofensestra reticulata (34.8 +/- 0.2 Ma) is at 157 m in Site 95-612. ... |
format |
Dataset |
author |
Wei, Wuchang |
author_facet |
Wei, Wuchang |
author_sort |
Wei, Wuchang |
title |
Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
title_short |
Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
title_full |
Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
title_fullStr |
Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
title_full_unstemmed |
Nannofossil datums and occurrence of microspherules in Upper Eocene sediments of the lower latitudes (Table 1) ... |
title_sort |
nannofossil datums and occurrence of microspherules in upper eocene sediments of the lower latitudes (table 1) ... |
publisher |
PANGAEA |
publishDate |
1995 |
url |
https://dx.doi.org/10.1594/pangaea.702680 https://doi.pangaea.de/10.1594/PANGAEA.702680 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1016/0031-0182(95)00075-w |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.70268010.1016/0031-0182(95)00075-w |
_version_ |
1810464151966842880 |