Changes in magnetic mineral assemblages as a proxy for redox conditions around the Cenomanian-Turonian boundary

G Greger, C Wagner, I Lascu… - AGU Fall Meeting …, 2022 - ui.adsabs.harvard.edu
Abstract Changes in the environment occurring around the Cenomanian-Turonian boundary
are associated with Oceanic Anoxic Event 2 (OAE2), a hyperthermal event that occurred …

Environmental Changes Across the Cenomanian-Turonian Boundary as Revealed by Biostratigraphic and Magnetic Analyses of Continental Shelf Sediments from the …

C Wagner, JM Self-Trail, G Greger… - AGU Fall Meeting …, 2022 - ui.adsabs.harvard.edu
Abstract Oceanic Anoxic Event 2 (OAE2,~ 94 Ma ago) occurred near the Cenomanian-
Turonian (Ce-Tu) boundary. OAE2 is associated with widespread black shale deposits in the …

A depth‐transect of ocean deoxygenation during the Paleocene‐Eocene Thermal Maximum: Magnetofossils in sediment cores from the southeast atlantic

P Xue, L Chang, GR Dickens… - Journal of Geophysical …, 2022 - Wiley Online Library
Abstract The Paleocene‐Eocene Thermal Maximum (PETM,∼ 56 Ma) presents a past
analog for future global warming. Previous studies provided evidence for major loss of …

Magnetic unmixing of conventional and giant coastal marine magnetofossils during the Paleocene-Eocene Thermal Maximum

C Wagner, I Lascu, PC Lippert, K Livi… - AGU Fall Meeting …, 2020 - ui.adsabs.harvard.edu
Conventional magnetofossils represent magnetosome morphologies biomineralized by
known modern magnetotactic bacteria. Giant magnetofossils represent morphologies with …

Magnetofossil reconstructions of ocean redox conditions through Cenozoic transient warming periods

L Chang, P Xue, E Thomas, G Dickens… - AGU Fall Meeting …, 2023 - ui.adsabs.harvard.edu
Understanding ocean redox perturbations across Cenozoic global warming periods through
the study of marine sedimentary records can provide important insights into our current and …

Giant Discovery of 97 Ma Magnetofossils and Their Environmental Implications

C Wagner, I Lascu, JM Self-Trail… - AGU Fall Meeting …, 2023 - ui.adsabs.harvard.edu
Here, we report the oldest robust record of both conventional and giant magnetofossils at~
97 Ma from Holland Park, Virginia. Magnetofossils are the remains of magnetotactic bacteria …

Abrupt Northwest Atlantic deep-sea oxygenation decline preceded the Palaeocene-Eocene Thermal Maximum

P Xue, L Chang, E Thomas - Earth and Planetary Science Letters, 2023 - Elsevier
Reconstruction of oceanic redox conditions across the Palaeocene-Eocene Thermal
Maximum (PETM,∼ 55.93 Ma) provides crucial information on potential PETM triggers and …

High-resolution magnetic susceptibility and geochemistry for the Cenomanian/Turonian boundary GSSP with correlation to time equivalent core

BB Ellwood, JH Tomkin, KT Ratcliffe, M Wright… - Palaeogeography …, 2008 - Elsevier
The Upper Cretaceous Cenomanian/Turonian (C/T) boundary represents the most
significant thermal climatic event in the Mesozoic, and it has been well-studied. Here we …

Characterizing magnetofossils from first‐order reversal curve (FORC) central ridge signatures

D Heslop, AP Roberts, L Chang - Geochemistry, Geophysics …, 2014 - Wiley Online Library
The central ridge structure of a first‐order reversal curve (FORC) distribution is indicative of
uniaxial noninteracting single domain magnetic particles, which provides the opportunity to …

Diversification of iron‐biomineralizing organisms during the Paleocene‐Eocene Thermal Maximum: Evidence from quantitative unmixing of magnetic signatures of …

CL Wagner, I Lascu, PC Lippert, R Egli… - Paleoceanography …, 2021 - Wiley Online Library
Conventional magnetofossils represent magnetic mineral remains of magnetotactic bacteria.
Giant magnetofossils have no known modern analog. Both conventional and giant …