Kaminski, Michael Anthony; Gradstein, Felix M; Berggren, William A (1989): Estimated chronologic ages of benthic microfossil events in ODP Site 105-647 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.745254, Supplement to: Kaminski, MA et al. (1989): Paleogene benthic foraminifer biostratigraphy and paleoecology at Site 647, southern Labrador Sea. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 705-730, https://doi.org/10.2973/odp.proc.sr.105.124.1989
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Abstract:
Benthic foraminifers were examined from the Paleogene of Ocean Drilling Program (ODP) Site 647 and Deep Sea Drilling Program (DSDP) Site 112 in the southern Labrador Sea. The Paleogene sequence of the deep Labrador Sea can be subdivided into seven assemblages, based on the ranges and relative abundance of characteristic taxa. The first occurrences (FOs) and last occurrences (LOs) of important benthic taxa are calibrated to a standard biochronology, by interpolating from our age model for Site 647. The biostratigraphy of Site 647 is used to improve the age estimates of Site112 cores. Fifteen microfossil events in Site 647 also are found in the sedimentary wedge along the Labrador Margin. A comparison of the probabilistic microfossil sequence from the Labrador Margin with that at Site 647 yields four isochronous benthic foraminifer LOs. Two new species are described from Sites 647 and 112: Hyperammina kenmilleri, Kaminski n.sp., and Ammodiscus nagyi Kaminski n.sp.
Significant faunal turnovers are observed at the Ypresian/Lutetian and Eocene/Oligocene boundaries. The Ypresian/Lutetian boundary is characterized by a Glomospira-facies and is attributed to a rise in the CCD (carbonate compensation depth) associated with the NP14 lowstand in sea level. The Eocene/Oligocene boundary is delimited by the LO of Spiroplectammina spectabilis and Reticulophragmium amplectens. The change from an Eocene agglutinated assemblageto a predominantly calcareous assemblage in the early Oligocene took place gradually, over a period of about 4 Ma, but the rate of change accelerated near the boundary. This faunal turnover is attributed to changes in the preservationof agglutinated foraminifers, as delicate species disappeared first. Increasingly poorer preservation of agglutinated foraminifers in the late Eocene to earliest Oligocene reflects the first appearance of cool, nutrient-poor deep water in the southern Labrador Sea. The approximately coeval disappearance of agglutinated assemblages along the Labrador Margin was caused by a regional trend from slope to shelf environments, accentuated by the 'mid'-Oligocene lowstand in sea level.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 53.331300 * Longitude: -45.262000
Date/Time Start: 1985-10-15T00:00:00 * Date/Time End: 1985-10-25T00:00:00
Minimum DEPTH, sediment/rock: 155.9 m * Maximum DEPTH, sediment/rock: 657.5 m
Event(s):
105-647 * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T00:00:00 * Date/Time End: 1985-10-25T00:00:00 * Elevation: -3870.0 m * Penetration: 839.3 m * Recovery: 537.8 m * Location: South Atlantic Ocean * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 86 cores; 819.9 m cored; 0 m drilled; 65.6% recovery
Comment:
Based on the age model used for the sedimentation-rate curve (Srivastava, Arthur, et al., 1987, doi:10.2973/odp.proc.ir.105.1987)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Ageprofile Datum Description | Ageprof dat des | Kaminski, Michael Anthony | FO = first occurrence, LO = last occurrence | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Age model | Age model | ka | Kaminski, Michael Anthony | ||
| 4 | Age, minimum/young | Age min | ka | Kaminski, Michael Anthony | ||
| 5 | Age, maximum/old | Age max | ka | Kaminski, Michael Anthony |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
101 data points
Data
| 1 Ageprof dat des | 2 Depth sed [m] | 3 Age model [ka] | 4 Age min [ka] | 5 Age max [ka] |
|---|---|---|---|---|
| LO Turrilina alsatica | 155.9 | 31000 | ||
| LO Bathysiphon sp. | 251.2 | 35500 | ||
| LO Glomospira charoides | 251.1 | 35500 | ||
| LO Ammodiscus latus | 251.1 | 35500 | ||
| LO Nuttallides umbonifera | 262.7 | 35800 | ||
| LO Ammodiscus cretaceous | 280.5 | 36300 | ||
| LO Osangularia mexicana | 280.5 | 36300 | ||
| LO Gavelinella micra | 280.5 | 36300 | ||
| LO Bolivina huneri | 281.4 | 36400 | ||
| LO Glomospira irregularis | 285.0 | 36500 | ||
| LO Recurvoides spp. | 290.3 | 36600 | ||
| LO Reticulophragmium amplectens | 290.3 | 36600 | ||
| LO Spiroplectammina spectabilis | 290.3 | 36600 | ||
| LO Ammolagena clavata | 290.3 | 36600 | ||
| LO Trochammina deformis | 290.3 | 36600 | ||
| LO Ammobaculites aff. polythalamus | 290.3 | 36600 | ||
| LO Subreophax scalaria | 290.3 | 36600 | ||
| LO Saccammina complanata | 290.8 | 36600 | ||
| LO Glomospira serpens | 290.8 | 36600 | ||
| LO Trochamminoides irregularis | 290.8 | 36600 | ||
| LO Rhizammina spp. | 300.3 | 36900 | ||
| LO Haplophragmoides walteri | 300.3 | 36900 | ||
| LO Reophax pilulifer | 318.0 | 37400 | ||
| LO Gavelinella capitata | 318.0 | 37400 | ||
| LO Cibicidoides grimsdalei | 328.4 | 37600 | ||
| LO Hyperammina kenmilleri n.sp. | 329.9 | 37700 | ||
| LO Bulimina macilenta | 329.9 | 37700 | ||
| LO Karreriella coniformis | 331.4 | 37700 | ||
| LO Bigenerina sp. | 331.4 | 37700 | ||
| LO Reophax guttifer | 339.2 | 38000 | ||
| LO Ammosphaeroidina sp. | 340.7 | 38000 | ||
| LO Reticulophragmium placenta | 350.6 | 38300 | ||
| LO Hormosina distans | 360.3 | 38600 | ||
| LO Glomospira gordialis | 360.3 | 38600 | ||
| LO Nuttallides truempyi | 386.0 | 39200 | ||
| LO Karreriella con versa | 405.8 | 39800 | ||
| FO Spiroplectammina cubensis | 408.8 | 39900 | ||
| FO Spirosigmoilinella compressa | 425.8 | 40400 | ||
| LO Spiroplectammina spectabilis perplexa | 434.4 | 40600 | ||
| LO Spiroplectammina navarroana | 460.3 | 41300 | ||
| FO Ammodiscus nagyi n.sp. | 498.3 | 42400 | ||
| LO Aragonia spp. | 540.0 | 43500 | ||
| LO Cibicidoides subspiratus | 569.1 | 44300 | ||
| FO Ammodiscus latus | 578.8 | 44600 | ||
| LO Verneuilinoides polystrophus | 578.8 | 44600 | ||
| LO Dendrophrya ex gr. excelsa | 620.7 | 488000 | 526000 | |
| LO Hormosina ovulum | 627.2 | 488000 | 526000 | |
| LO Abyssammina spp. | 638.6 | 526000 | 536000 | |
| LO Quadrimorphina profunda | 657.5 | 54200 |