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Funding statement
Department of
Energy grant DE-FG02-ER13221D.
National Science Foundation grants EAR-8896187 and EAR87-07719.
U.S. Geological Survey grant USGS 14-08-0001-G1365.
L-DGO contribution 4543.
Remove constraint Funding statement: Department of
Energy grant DE-FG02-ER13221D.
National Science Foundation grants EAR-8896187 and EAR87-07719.
U.S. Geological Survey grant USGS 14-08-0001-G1365.
L-DGO contribution 4543.