Late Cretaceous marine biodiversity dynamics in the Eastern Caucasus, northern Neo-Tethys ocean: Regional imprints of global events
During the Late Cretaceous, marine organisms experienced significant changes in their biodiversity. These diversity changes were influenced, particularly, by the Oceanic Anoxic Event 2 near the Cenomanian/Turonian boundary (93.6 Ma). Here, stratigraphic ranges of 80 marine macroinvertebrate...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Faculty of Mining and Geology, Belgrade
2011-01-01
|
| Series: | Geološki Anali Balkanskoga Poluostrva |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0350-0608/2011/0350-06081172029R.pdf |
| Summary: | During the Late Cretaceous, marine organisms experienced significant changes
in their biodiversity. These diversity changes were influenced, particularly,
by the Oceanic Anoxic Event 2 near the Cenomanian/Turonian boundary (93.6
Ma). Here, stratigraphic ranges of 80 marine macroinvertebrate genera
(cephalopods, brachiopods, gastropods, corals, and echinoids) were employed
to assess the Late Cretaceous biodiversity dynamics in the Eastern Caucasus,
which covered a large region located in the northern Neo-Tethys Ocean. Our
results outline three prominent diversity minima, which occurred in the late
Cenomanian-late Turonian, the early Santonian-late Campanian, and the late
Maastrichtian. Probably, the latter two were just local. Despite of some
differences in trends between the regional and global marine biodiversity
dynamics, the late Cenomanian-late Turonian biotic crisis appeared both on
the regional and global scales and was probably a long-term consequence of
the Oceanic Anoxic Event 2. Oxygen depletion and eustaticallydriven shoreline
shifts are considered as plausible causes of the observed biodiversity
dynamics. |
|---|---|
| ISSN: | 0350-0608 2406-0747 |