Wade, Bridget S; Olsson, Richard K (2009): (Table 1) Test sizes of Morozovelloides crassatus from ODP Site 171-1052 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.777716, Supplement to: Wade, BS; Olsson, RK (2009): Investigation of pre-extinction dwarfing in Cenozoic planktonic foraminifera. Palaeogeography, Palaeoclimatology, Palaeoecology, 284(1-2), 39-46, https://doi.org/10.1016/j.palaeo.2009.08.026
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Abstract:
We propose a phenomenon termed “pre-extinction dwarfing” in Cenozoic planktonic foraminifera. High-resolution morphometric analysis shows a reduction in maximum or mean test size in the 2-20 kyr interval preceding the extinction of Pliocene Globorotalia exilis and Globorotalia miocenica from the Caribbean Sea and middle Eocene Morozovelloides crassatus from the western North Atlantic. Through a series of case studies and review of qualitative observations from the literature, we suggest that dwarfing occurs in a number of species of planktonic foraminifera foreshadowing their demise and that such size changes are not just a phenomenon associated with mass extinction events. We propose that this is a common stress-induced pattern that results in diminutive size in the pre-extinction interval.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 29.951300 * Longitude: -76.626800
Date/Time Start: 1997-01-31T12:00:00 * Date/Time End: 1997-02-06T04:30:00
Minimum DEPTH, sediment/rock: 92.37 m * Maximum DEPTH, sediment/rock: 127.21 m
Event(s):
171-1052B * Latitude: 29.951300 * Longitude: -76.626800 * Date/Time: 1997-01-31T12:00:00 * Elevation: -1345.0 m * Penetration: 119.5 m * Recovery: 115.65 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 119.5 m cored; 0 m drilled; 96.8 % recovery
171-1052F * Latitude: 29.951300 * Longitude: -76.626800 * Date/Time: 1997-02-06T04:30:00 * Elevation: -1342.0 m * Penetration: 128.5 m * Recovery: 129.12 m * Location: Blake Nose, North Atlantic Ocean * Campaign: Leg171B * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 128.5 m cored; 0 m drilled; 100.5 % recovery
Comment:
Sediment depth is given in mcd. Size data are for the >300 µm fraction.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Wade, Bridget S | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | AGE | Age | ka BP | Geocode | ||
| 5 | Sample comment | Sample comment | Wade, Bridget S | specimen | ||
| 6 | Morozovelloides crassatus, size | M. crassatus size | µm | Wade, Bridget S | ||
| 7 | Morozovelloides crassatus, size, standard deviation | M crassatus size std dev | ± | Wade, Bridget S | ||
| 8 | Chamber number | Chamber no | Wade, Bridget S | 212-250 µm, M. crassatus | ||
| 9 | Morozovelloides crassatus | M. crassatus | # | Wade, Bridget S | 212-250 µm | |
| 10 | Chamber number | Chamber no | Wade, Bridget S | 250-300 µm, M. crassatus | ||
| 11 | Morozovelloides crassatus | M. crassatus | # | Wade, Bridget S | 250-300 µm |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
360 data points