High-resolution early Mesozoic Pangean climatic transect in lacustrine environments
Analysis of 6700 m of core from the Newark rift basin in New Jersey, USA provides a high-resolution astronomically calibrated magnetic polarity time scale for the Late Triassic and Early Jurassic spanning about 33 million years. This time scale, and its application elsewhere, allows a significant si...
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ftdatacite:10.7916/d8bc47xf 2023-05-15T17:34:58+02:00 High-resolution early Mesozoic Pangean climatic transect in lacustrine environments Olsen, Paul E. Kent, Dennis V. 2000 https://dx.doi.org/10.7916/d8bc47xf https://academiccommons.columbia.edu/doi/10.7916/D8BC47XF unknown Columbia University Geology Paleoclimatology Text Articles article-journal ScholarlyArticle 2000 ftdatacite https://doi.org/10.7916/d8bc47xf 2021-11-05T12:55:41Z Analysis of 6700 m of core from the Newark rift basin in New Jersey, USA provides a high-resolution astronomically calibrated magnetic polarity time scale for the Late Triassic and Early Jurassic spanning about 33 million years. This time scale, and its application elsewhere, allows a significant simplification of the pattern of climate-sensitive facies in the early Mesozoic basins of the central and north Atlantic margins. Coals and deep-water lacustrine deposits were produced at the paleoequator (Richmond-type sequences), while strikingly cyclical lacustrine and playa deposits were produced \00 to the north and south (Newark-type lacustrine sequences). At 10-30 ON, eolian dunes, playas sediments and evaporites were deposited (Fundy-type sequences). Farther north, shallow-water lacustrine red beds were deposited (Fleming Fjord-type sequences), while yet farther north (-40°), perennial-lake black mudstones and coals again dominated in the humid temperate zone (Kap Stewart-type sequences). Central Pangea drifted north about 10° during the Late Triassic, and the vertical sequence of climate-sensitive facies in individual basins changed as the basins passed through different climate zones. This simple zonal climate pattern explains most first-order changes in overall lacustrine sequences seen in the rift zone. Lakelevel cycles of Milankovitch origin change in a predicable way with the latitudinal shifts in climate and lacustrine style. Roughly \0 ky precessional cycles dominate within a few degrees of the equator, while -20 ky precessional cycles are dominant northward to about 30 ON where 40 ky obliquity cycles become evident in lake-level records. Text North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Kap ENVELOPE(23.567,23.567,65.533,65.533) Fleming Fjord ENVELOPE(-22.867,-22.867,71.733,71.733) Kap Stewart ENVELOPE(-22.633,-22.633,70.433,70.433) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Geology Paleoclimatology |
spellingShingle |
Geology Paleoclimatology Olsen, Paul E. Kent, Dennis V. High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
topic_facet |
Geology Paleoclimatology |
description |
Analysis of 6700 m of core from the Newark rift basin in New Jersey, USA provides a high-resolution astronomically calibrated magnetic polarity time scale for the Late Triassic and Early Jurassic spanning about 33 million years. This time scale, and its application elsewhere, allows a significant simplification of the pattern of climate-sensitive facies in the early Mesozoic basins of the central and north Atlantic margins. Coals and deep-water lacustrine deposits were produced at the paleoequator (Richmond-type sequences), while strikingly cyclical lacustrine and playa deposits were produced \00 to the north and south (Newark-type lacustrine sequences). At 10-30 ON, eolian dunes, playas sediments and evaporites were deposited (Fundy-type sequences). Farther north, shallow-water lacustrine red beds were deposited (Fleming Fjord-type sequences), while yet farther north (-40°), perennial-lake black mudstones and coals again dominated in the humid temperate zone (Kap Stewart-type sequences). Central Pangea drifted north about 10° during the Late Triassic, and the vertical sequence of climate-sensitive facies in individual basins changed as the basins passed through different climate zones. This simple zonal climate pattern explains most first-order changes in overall lacustrine sequences seen in the rift zone. Lakelevel cycles of Milankovitch origin change in a predicable way with the latitudinal shifts in climate and lacustrine style. Roughly \0 ky precessional cycles dominate within a few degrees of the equator, while -20 ky precessional cycles are dominant northward to about 30 ON where 40 ky obliquity cycles become evident in lake-level records. |
format |
Text |
author |
Olsen, Paul E. Kent, Dennis V. |
author_facet |
Olsen, Paul E. Kent, Dennis V. |
author_sort |
Olsen, Paul E. |
title |
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
title_short |
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
title_full |
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
title_fullStr |
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
title_full_unstemmed |
High-resolution early Mesozoic Pangean climatic transect in lacustrine environments |
title_sort |
high-resolution early mesozoic pangean climatic transect in lacustrine environments |
publisher |
Columbia University |
publishDate |
2000 |
url |
https://dx.doi.org/10.7916/d8bc47xf https://academiccommons.columbia.edu/doi/10.7916/D8BC47XF |
long_lat |
ENVELOPE(23.567,23.567,65.533,65.533) ENVELOPE(-22.867,-22.867,71.733,71.733) ENVELOPE(-22.633,-22.633,70.433,70.433) |
geographic |
Kap Fleming Fjord Kap Stewart |
geographic_facet |
Kap Fleming Fjord Kap Stewart |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.7916/d8bc47xf |
_version_ |
1766133977860538368 |