Deltas, Waterfalls, and LakesDeltasDeltas, GreeceInland DeltasAmerica’s Inland DeltaWaterfallsAngel Falls, VenezuelaYosemite Falls, CaliforniaNiagara FallsEvolution of Niagara FallsSlide 11Retreat of Niagara FallsLakesDelta Dam: Lake Ponchartrain, LouisianaVolcanic Dam: Clear Lake, CaliforniaTectonic Dam: Lake Kioga, UgandaHow Lakes DieDeltas, Waterfalls, and LakesDeltasDeltas, GreeceInland DeltasAmerica’s Inland DeltaWaterfallsResistant Ledge•Niagara•Victoria Hanging Valley•Glacial: Yosemite •Non-glacial: AngelAngel Falls, VenezuelaYosemite Falls, CaliforniaNiagara FallsEvolution of Niagara FallsEvolution of Niagara FallsRetreat of Niagara FallsLakesLimited Lifetime Thousands - Millions of Yr.How They Form:•Grabens–Tahoe 1600' –Baikal 5600' –Tanganyika 4000' •Scour–Great Lakes to 1300' –Great Slave L. 2000' –Lake Winnipeg •Damming•Tectonic - Lake Kioga•Landslide - Spirit Lake •Lava Flow - Clear Lake, California •Glaciers - Lake Agazziz •Delta - Lake Ponchartrain•Small Lakes•Volcanic Collapse - Crater Lake •Sinkholes •Kettle PondsDelta Dam: Lake Ponchartrain, LouisianaVolcanic Dam: Clear Lake, CaliforniaTectonic Dam: Lake Kioga, UgandaHow Lakes Die•Eutrophication •Infilling - Only Way to Destroy Very Deep Lakes •Drainage at Outlet •Climate