Copy the page URI to the clipboard
Caswell, Bryony A. and Coe, Angela L.
(2014).
DOI: https://doi.org/10.1016/j.pgeola.2014.06.001
Abstract
Extreme environmental change during the Toarcian Oceanic Anoxic Event had widespread impacts on marine biota. This study provides new evidence, from the Yorkshire coast sections, UK, that the event was associated with periods of elevated fish and ammonite mortality. Using a synthesis of pelagic macrofaunal changes, benthic macrofaunal data and geochemical proxies we show that there are stratigraphical correlations between: (1) pelagic macrofaunal ranges and abundance, (2) benthic macrofaunal abundance, and (3) geochemical proxies that indicate deoxygenation. We identify eight stratigraphical intervals of differing character. Results suggest two major phases of relatively persistent deoxygenation with photic zone euxinia. The cyclostratigraphic timescale indicates that each phase lasted at least tens of thousands of years. Belemnite migration during the event probably resulted from increased seawater temperatures and low food supply similar to that observed for many marine taxa, including squid, within the present-day oceans.
Viewing alternatives
Metrics
Public Attention
Altmetrics from AltmetricNumber of Citations
Citations from DimensionsItem Actions
Export
About
- Item ORO ID
- 52806
- Item Type
- Journal Item
- ISSN
- 0016-7878
- Project Funding Details
-
Funded Project Name Project ID Funding Body PhD Studentship Not Set NERC (Natural Environmental Research Studentship - Keywords
- oceanic anoxic event; environmental change; belemnites; ammonites; biogeographic range shift; fish mortality
- Academic Unit or School
-
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Environment, Earth and Ecosystem Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM) - Copyright Holders
- © 2014 The Geologists' Association
- Depositing User
- Angela Coe