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Old groundwater in parts of the upper Patapsco aquifer, Atlantic Coastal Plain, Maryland, USA: evidence from radiocarbon, chlorine-36 and helium-4 |
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| Authors: | L. N. Plummer J. R. Eggleston D. C. Andreasen J. P. Raffensperger A. G. Hunt G. C. Casile |
| Affiliation: | 1. US Geological Survey, 432 National Center, Reston, VA, 20192, USA 2. US Geological Survey, 79 Greenough St., Brookline, MA, 02445, USA 3. Maryland Geological Survey, 2300 St. Paul Street, Baltimore, MD, 21218, USA 4. US Geological Survey, 5522 Research Park Drive, Baltimore, MD, 21228, USA 5. US Geological Survey, Denver Federal Center, BLD 21, MS 963, Denver, CO, 80225, USA |
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