Charles W. Holmes (retired) Debra Willard, Unknown, Florida Bay Cores Site Information.Online Links:
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.01. Longitudes are given to the nearest 0.01. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 80.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257.
703 648 5320 (voice)
703 648 6953 (FAX)
dwillard@usgs.gov
The use of radioactive isotopes is founded on the known physical property of radioactive material, the half-life. A half-life of an isotope is the amount of time it takes for half of a given number of atoms to "decay" to another element. The age of objects that contain radioactive isotopes with known half-lives can be calculated by determining the percent of the remaining radioactive material. To use this method successfully certain other prerequisites must be met. These are: 1. the chemistry of the nuclide (element) is known; 2. once the nuclide is incorporated into the substrate the only change is radioactive decay, and 3. in order to be useful, it is relatively easy to measure. The objective of the project is to measure the distribution of short-lived radionuclides to provide a temporal component to the processes at work within the Ecosystem.
Person who carried out this activity:
703 648 5320 (voice)
703 648 6953 (FAX)
dwillard@usgs.gov
Brewster-Wingard, G. Lynn Ishman, Scott E.,; Willar, 1998, Preliminary Paleontologic Report on Core 37, from Pass Key, Everglades National Park, Florida Bay: USGS Open-File Report 98-0122, U.S. Geological Survey, Reston, VA.Online Links:
Ishman, S. E. Brewster-Wingard, G. L.; Wi, 1996, Preliminary paleontologic report on core T-24, Little Madeira Bay, Florida: USGS Open-File Report 96-0543, U.S. Geological Survey, Reston, VA.Online Links:
Robbins, J. A. Holmes, C. W., Halley, R. B, 2000, Time-averaged fluxes of lead and fallout radionuclides to sediments in Florida Bay: Journal of Geophysical Research, Oceans v. 105, n. C12, American Geophysical Union, Washington, DC.
Bates, Annie L. Spiker, Elliott C.; Holmes,, 1998, Speciation and isotopic composition of sedimentary sulfur in the Everglades, Florida, USA: Chemical Geology 146 (3-4), Elsevier, Amsterdam, Netherlands.
Orem, W. H. Holmes, C. W.; Kendall. C.;, 1999, Geochemistry of Florida Bay sediments: I. nutrient history at five sites in eastern and central Florida Bay: Journal of Coastal Research v. 15, Coastal Research and Education Foundation (CERF), Royal Palm Beach, FL.Online Links:
Brewster-Wingard, G. L. Ishman, S. E., Willard, D. , 1997, Preliminary paleontologic report Cores 19A and 19B, Russell Bank, Everglades National Park, Florida Bay: USGS Open-File Report 97-460, U.S. Geological Survey, Reston, VA.Online Links:
The location of sample sites was established by GPS.
The core log was revised 10/29/1997 and shows the information for all the cores used in the study
not applicable
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- None. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
hhenkel@usgs.gov
Florida Bay Cores Site Information
The data have no implied or explicit guarantees
| Data format: | MS Excel Size: 0.012 |
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| Network links: |
<http://sofia.usgs.gov/exchange/holmes/holmescores.html> |
727 803-8747 ext 3028 (voice)
727 803-2030 (FAX)
sofia-metadata@usgs.gov
U.S. Department of the Interior, U.S. Geological Survey
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