Assertion: mississippian aquifer | /r/HasProperty | observed as picturesque limestone bluffs
Facets:
value: along the mississippi river valley
type: LOCATION
value: between keokuk
type: LOCATION
Source sentences:
text: The Mississippian aquifer can be observed as picturesque limestone bluffs along the Mississippi River valley (its namesake), especially between Burlington and Keokuk in southeastern Iowa.