Assertion: pyrite | /r/AtLocation | black shale
Facets:
value: at the roberts quarry
type: LOCATION
value: abundantly
type: MANNER
value: commonly
type: TEMPORAL
Source sentences:
text: For this reason, pyrite commonly and preferentially occurs in dark-colored organic-rich sediments such as coal and black shale.
text: Pyrite occurs abundantly in black shale and interbedded limestone at the Roberts Quarry on the south side of Peawaukee Lake.