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Page 1: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

Erosion, Weathering and Regolith Development

Cliff Riebe, Jesse Hahm,

Heather Rogers &Steve Holbrook

Page 2: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

San Francisco

Lake Tahoe

Pacific Ocean

85 km

LasVegas

SierraNevada

Mountains

Alpine slopes

Dense conifer forests

Oak woodlandsFresno

Altitudinal variations in vegetation

Page 3: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

Southern Sierra CZOcatchments

Bald Mountain

However, altitudinal variations in climate do not explain everything!

Page 4: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

What controls the presence/absence and thickness of regolith?

Holbrook et al.in revision

Important for understanding:– water cycle• soil-water storage• timing & amount of melt runoff

– pedogenesis– weathering, erosion and landscape evolution

Page 5: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

Influence of geology on vegetation:Bulk geochemistry, including bedrock P

Page 6: Erosion, Weathering and R egolith Development Cliff Riebe, Jesse Hahm , Heather Rogers &

Influence of geology on vegetation:

Mineralogy?


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