Middle Eocene to early Oligocene lignite brGDGT-derived temperatures and pH, biomarker data and TOC% from SE Australia
The greenhouse to icehouse climate transition from the Eocene into the Oligocene is well-documented by sea surface temperature records from the southwest Pacific and Antarctic margin that show evidence of pronounced long-term cooling. However, identification of a driving mechanism depends on a bette...
Main Authors: | , , , , , , , |
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Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
2021
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Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.933176 https://doi.org/10.1594/PANGAEA.933176 |
Summary: | The greenhouse to icehouse climate transition from the Eocene into the Oligocene is well-documented by sea surface temperature records from the southwest Pacific and Antarctic margin that show evidence of pronounced long-term cooling. However, identification of a driving mechanism depends on a better understanding of whether this cooling was also present in terrestrial settings. Here, we present a semi-continuous terrestrial temperature record spanning from the middle Eocene to the early Oligocene (~41-33 Ma), using bacterial molecular fossils (biomarkers) preserved in a sequence of SE Australian lignites from two locations. We reconstruct terrestrial temperatures and compare them to existing sea-surface temperature records from the Southern Hemisphere from the middle Eocene to Early Oligocene. |
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