Assertion: aquifer's part | /r/CapableOf | form impermeable confining layer
Facets:
value: nearly
type: DEGREE
Source sentences:
text: The upper part of the Laramie Formation forms a nearly impermeable confining layer that is 300 to 400 feet thick and impedes water movement between the Arapahoe aquifer and the underlying Laramie-Fox Hills aquifer.