Brooks, Gregg R; Doyle, Larry J; McNeillie, Jennifer I (1986): Sediment constituents and quartz in the sand-sized fraction, West Florida slope and Mississippi Fan sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.788166, Supplement to: Brooks, GR et al. (1986): A massive carbonate gravity-flow deposit intercalated in the lower Mississippi Fan. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 541-546, https://doi.org/10.2973/dsdp.proc.96.126.1986
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Abstract:
The interval between 488.2 and 513.7 m below seafloor at Deep Sea Drilling Project (DSDP) Site 615 is interpreted as a single carbonate gravity-flow deposit. The deposit has characteristics of both a debris flow and a high-density turbidity current. Comparison of the sedimentary constituents in 15 samples from this site with samples from 26 core tops from the upper West Florida continental slope and eastern Mississippi Fan shows many similarities. Shallow-water indicators, such as mollusk and echinoid fragments, occur in both suites of samples. The West Florida continental margin, therefore, is a potential provenance area. The Yucatan slope is also a possible source, but data from it are limited.
The recognition of carbonate gravity-flow deposits intercalated within the Mississippi Fan refines our understanding of Pleistocene sedimentation within the Gulf basin. Deposition in the deep Gulf is dominated by the construction of the Mississippi Fan. However, this marine terrigenous depocenter is located between two large carbonate depocenters, the West Florida continental margin on the east and the Yucatan peninsula on the southwest. Periodically, the carbonate slope in these two regions fails, injecting carbonate gravity flows into the accreting terrigenous deep-sea fan.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 25.988266 * Median Longitude: -85.755908 * South-bound Latitude: 24.800000 * West-bound Longitude: -87.016667 * North-bound Latitude: 28.300000 * East-bound Longitude: -83.900000
Date/Time Start: 1983-10-04T00:00:00 * Date/Time End: 1983-10-04T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Brooks, GR; Doyle, LJ; McNeillie, JI (1986): (Table 1) Carbonate constituents and quartz in the sand-sized fraction in Mississippi Fan sediments, DSDP Hole 96-615. https://doi.org/10.1594/PANGAEA.788161
- Brooks, GR; Doyle, LJ; McNeillie, JI (1986): (Table 2) Sediment constituents and quartz in the sand-sized fraction, West Florida slope and Eastern Mississippi Fan, during USGS R/V Gyre cruises G80-6A and G81-8. https://doi.org/10.1594/PANGAEA.788163