Assertion: aquifer | /r/MadeOf | gravel
Facets:
Source sentences:
text: Aquifers consist of porous material such as sand, gravel, and fractured rock.
text: These aquifers consist of clay, sand and gravel and are found along the river valleys, around Koo Wee Rup and in dune deposits near the coast.
text: These aquifers consist of limestones, sands, clays, gravels, and conglomerates.