Assertion: aquifer | /r/HasProperty | sand
Facets:
value: primarily
type: DEGREE
Source sentences:
text: When the aquifer is composed of sand or permeable sandstone, it can sometimes be purified after traveling only a few dozen meters through it.
text: The aquifer is composed almost entirely of this coarse material with very little silt and sand.
text: The aquifer is primarily composed of sand locally interbedded with gravel, silt, clay, and lignite.