Florida Bay sample core logEntry ID: USGS_SOFIA_hlmscsmp
Abstract: The data set contains fractions, intervals, location of sample, analyses, and sections with no sample remaining referenced to site name.
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.
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: Charles W. Holmes (retired) Debra Willard
Dataset Title: Florida Bay sample core log
Data Presentation Form: spreadsheetsOnline Resource: http://sofia.usgs.gov/exchange/holmes/holmescores.html
Start Date: 1994-02-07Stop Date: 1997-06-13
Quality Not all sites have information for all the data parameters.
Access Constraints None
Use Constraints None. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Data Set Progress
Distribution Size: 0.034
Distribution Format: EXCEL
Role: TECHNICAL CONTACT
Phone: (703) 648-5320
Fax: (703) 648-6953
Email: dwillard at geochange.er.usgs.gov
Email: dwillard at mailrvag2.er.usgs.gov
MS 926A National Center U.S. Geological Survey
Province or State: VA
Postal Code: 20192
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
Gough, L. P., Kotra, R. K.; Holmes, C. W.; Orem, W. H.; Hageman, P. L.; Briggs, P. H.; Meier, A. L.; Brown, Z. A., 2000, Regional Geochemistry of Metals in Organic-Rich Sediments, Sawgrass, and Surface Water from Taylor Slough, Florida, USGS Open-File Report, 00-327, Reston, VA, U.S. Geological Survey.
Holmes, Charles W., Robbins, John, Halley, Robert, Bothner, Michael, ten Brink, Marilyn, Marot, Marci, 2001, Sediment dynamics of Florida Bay mud banks on a decadal time scale, Bulletins of American, Paleontology, 361, Ithica, NY, Paleontoligical Research Institution, in Paleoecological studies of South Florida, Bruce Wardlaw, editor.
Creation and Review Dates
DIF Creation Date: 2007-10-31
Last DIF Revision Date: 2009-05-14