Assertion: aquifer's part | /r/HasProperty | principal geologic unit
Facets:
value: in northwestern nebraska
type: LOCATION
value: in south central south dakota
type: LOCATION
value: in southeastern wyoming
type: LOCATION
Source sentences:
text: In northwestern Nebraska, south central South Dakota, and southeastern Wyoming, the fractured part of the Brule Formation or the Arikaree Group, is the principal geologic unit.