Charles W. Holmes (retired) Debra Willard Unknown spreadsheet http://sofia.usgs.gov/exchange/holmes/holmescores.html The dataset contains the core number, location, latitude/longitude, date collected, and core surface description for cores from Rabbitt Key, Cluett Key, Whipray Basin, Bob Allen Key, Rankin Bight, Lake Ingraham, Russell Bank, Johnson Key, Porjoe Key, Trout Creek, Little Madeira Bay, Crcodile Point, Pass Key, and Park Key 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. 19940207 19970613 ground condition Complete None planned -81.75 -80.1 26.5 24.75 none hydrology geochemistry chemistry radioactive isotopes geology radionuclides radon decay sediments sediment cores ISO 19115 Topic Category environment geoscientificInformation inlandWaters 007 008 012 Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, D.C., National Institute of Standards and Technology United States US U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D. C., NIST Florida FL Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology Broward County Collier County Hendry County Miami-Dade County Monroe County Palm Beach County USGS Geographic Names Information System Bob Allen Key Cluett Key Johnson Key Lake Ingraham Little Madeira Bay Pass Key Porjoe Key Rabbit Key Rankin Bight Trout Creek Whipray Basin none Central Everglades Florida Keys SW Big Cypress Russell Bank none None. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data. Debra A Willard U.S. Geological Survey mailing address

926A National Center

Reston VA 20192 703 648 5320 703 648 6953 dwillard@usgs.gov MS Excel Brewster-Wingard, G. Lynn Ishman, Scott E.,; Willard, Debra A.; Edwards, Lucy E.; Holmes, Charles W. 1998 report USGS Open-File Report 98-0122 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/pdf/of/ofr98122.html Ishman, S. E. Brewster-Wingard, G. L.; Willard, D. A.; Cronin, T. M.; Edwards, L. E.; Holmes, C. W. 1996 report USGS Open-File Report 96-0543 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/pdf/of/ofr96543.html Robbins, J. A. Holmes, C. W., Halley, R. B., Bothner, M., Shinn, E. A., Graney, J., Keeler, G., ten Brink, M., Orlandini, K. A., Rudnick, D. 2000 report Journal of Geophysical Research, Oceans v. 105, n. C12 Washington, DC American Geophysical Union Bates, Annie L. Spiker, Elliott C.; Holmes, Charles W. 1998 report Chemical Geology 146 (3-4) Amsterdam, Netherlands Elsevier Orem, W. H. Holmes, C. W.; Kendall. C.; Lerch, H. E.; Bates, A. L.; Silva, S. R.; Boylan, A.; Corum, M.; Marot, M.; Hedgman, C. 1999 report Journal of Coastal Research v. 15 Royal Palm Beach, FL Coastal Research and Education Foundation (CERF) The entire paper is available from the Journal of Coastal Research website at http://www.cerf-jcr-org. Journal membership is required for download. http://sofia.usgs.gov/publications/papers/geochem_flbaysed Brewster-Wingard, G. L. Ishman, S. E., Willard, D. A., Edwards, L. E., Holmes, C. W. 1997 report USGS Open-File Report 97-460 Reston, VA U.S. Geological Survey http://sofia.usgs.gov/publications/ofr/97-460/ not applicable The core log was revised 10/29/1997 and shows the information for all the cores used in the study The location of sample sites was established by GPS. Long cores (>1 m in length), were taken in >30 cm of water through the "moon pool" of a motorized 25 ft pontoon barge either grounded on the bank or anchored with 4 anchors. The location was established by GPS. 1997 Debra A Willard U.S. Geological Survey mailing address

926A National Center

Reston VA 20192 703 648 5320 703 648 6953 dwillard@usgs.gov Florida Bay 0.01 0.01 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 Heather S.Henkel U.S. Geological Survey mailing address

600 Fourth St. South

St. Petersburg FL 33701 USA 727 803-8747 ext 3028 727 803-2030 hhenkel@usgs.gov Florida Bay Cores Site Information The data have no implied or explicit guarantees MS Excel 1997 0.012 http://sofia.usgs.gov/exchange/holmes/holmescores.html Log onto the SOFIA web site at http://sofia.usgs.gov none 20071031 Heather Henkel U.S. Geological Survey mailing and physical address

600 Fourth Street South

St. Petersburg FL 33701 USA 727 803-8747 ext 3028 727 803-2030 sofia-metadata@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998