Assertion: aquifer's boundary | /r/CapableOf | define the extent of the aquifer
Facets:
Source sentences:
text: The exterior boundary, defining the extent of the aquifer, was acquired through a previously digitized 1:1,000,000-scale map of the High Plains aquifer that was originally created by Donald Schild and Debra Spahr as part of the Regional Aquifer Systems Analysis (RASA) program.