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example 7 fine-silty,
mixed, superactive, mesic, shallow Xeric
Argidurid
(Colthorp
series)
These soils
are found on basalt plains and terraces, They are
moderately deep to bedrock and contain a lime-
and silica-cemented duripan at shallow depth. In
this photo, basalt bedrock can be seen at the
bottom of the profile. The presence of the
duripan and basalt bedrock at such shallow depths
creates problems for engineering uses where
excavation is required. These soils are members
of the Colthorp series.
For more information about Colthorp soils, click here.
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