Assertion: aquifer | /r/CapableOf | pinch out against precambrian rocks
Facets:
value: eastward
type: LOCATION
Source sentences:
text: In a large area in central South Dakota, some of the slightly saline water in the lower Paleozoic aquifers leaks upward into shallower aquifers where the deeper aquifers pinch out eastward against Precambrian rocks.