Capay Valley is a unique landform of low, flat alluvial soils extending into the foothills like an appendage of the Great Central Valley.
(Capay Valley; is; a unique landform of low, flat alluvial soils) (low, flat alluvial soils; extending; into the foothills like an appendage of the Great Central Valley)
Capay Valley low, flat alluvial soils
is extending
a unique landform of low, flat alluvial soils
into the foothills like an appendage of the Great Central Valley