Assertion: aquifer's thickness | /r/HasProperty | about 2,000 feet
Facets:
Source sentences:
text: The maximum thickness of the aquifer is about 2,000 feet.
text: The combined thickness of these formations is more than 2,000 feet in the deep part of the Williston Basin, but the thickness of the lower Paleozoic aquifers is much less because the parts of the rocks that have minimal permeability or those that contain brine, oil, or gas are not considered to be aquifers.
text: The thickness of the aquifer is as much as 2,000 feet.