Allan James_Geomorphic Continuity - Lower Yuba River Accord
Allan James_Geomorphic Continuity - Lower Yuba River Accord
Allan James_Geomorphic Continuity - Lower Yuba River Accord
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Longitudinal Transition:<br />
Floodplain Widening at Colluvial Limit<br />
• Late Quaternary terraces dip below historical alluvium near Parks<br />
Bar. Earlier terraces and colluvium (with well developed soils)<br />
dip beneath historical alluvium in YGF.<br />
• Quaternary terraces<br />
in YGF were dredged.<br />
d d<br />
• Valley bottoms<br />
widen in YGF where<br />
modern alluvium<br />
emerge from older<br />
surfaces. This is<br />
where levees begin.<br />
Generalized from USDA digital soils data.
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