(Table 1) Types of giant magnetofossils in ODP holes ...
Magnetotactic bacteria biomineralize magnetic minerals with precisely controlled size, morphology, and stoichiometry. These cosmopolitan bacteria are widely observed in aquatic environments. If preserved after burial, the inorganic remains of magnetotactic bacteria act as magnetofossils that record...
| Main Authors: | , , , , , , |
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| Format: | Dataset |
| Language: | English |
| Published: |
PANGAEA
2012
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.815860 https://doi.pangaea.de/10.1594/PANGAEA.815860 |
| Summary: | Magnetotactic bacteria biomineralize magnetic minerals with precisely controlled size, morphology, and stoichiometry. These cosmopolitan bacteria are widely observed in aquatic environments. If preserved after burial, the inorganic remains of magnetotactic bacteria act as magnetofossils that record ancient geomagnetic field variations. They also have potential to provide paleoenvironmental information. In contrast to conventional magnetofossils, giant magnetofossils (most likely produced by eukaryotic organisms) have only been reported once before from Paleocene-Eocene Thermal Maximum (PETM; 55.8 Ma) sediments on the New Jersey coastal plain. Here, using transmission electron microscopic observations, we present evidence for abundant giant magnetofossils, including previously reported elongated prisms and spindles, and new giant bullet-shaped magnetite crystals, in the Southern Ocean near Antarctica, not only during the PETM, but also shortly before and after the PETM. Moreover, we have discovered giant ... : Supplement to: Chang, Liao; Roberts, Andrew P; Williams, Wyn; Fitz Gerald, John D; Larrasoaña, Juan C; Jovane, Luigi; Muxworthy, A R (2012): Giant magnetofossils and hyperthermal events. Earth and Planetary Science Letters, 351-352, 258-269 ... |
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