Assertion: anthracite | /r/AtLocation | area
Facets:
value: most abundantly
type: DEGREE
Source sentences:
text: Anthracite may be considered to be a transition stage between ordinary bituminous and graphite, produced by the more or less complete elimination of the volatile constituents of the former, and it is found most abundantly in areas that have been subjected to considerable earth-movements, such as the flanks of great mountain ranges.