Jeff
Marshall’s Research
WATERSHEDS & RIVERS
OTHER RESEARH TOPICS:
Tectonics
& Earthquakes | Coastlines &
Beaches | Mountains
& Deserts
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Río Savegre, San
Gerardo de Dota, Cordillera de Talamanca, Costa Rica |
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Field Sites & Projects:
Lancaster
County, Pennsylvania
Los Angeles
River Basin, California
San Gabriel
Mountains, California
Costa Rica ,
Central America
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