Assertion: bedrock aquifer | /r/CapableOf | extend into the subsurface
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Source sentences:
text: All major bedrock aquifers, including those comprising the Cambrian-Ordovician aquifer system in Segment 9, crop out at the bedrock surface, but also extend into the subsurface and yield usable quantities of water in a much larger area than their outcrop, as in, for example, southwestern Minnesota and northwestern Iowa.