Assertion: aquifer's amount | /r/HasProperty | mined
Facets:
value: during the instability
type: TEMPORAL
value: from the dakota sandstone at morrison
type: LOCATION
Source sentences:
text: A small amount of uranium ore has been mined from the Dakota Sandstone at Morrison, Colorado, where the sandstone is impregnated with petroleum.
text: Small amounts of gypsum, limestone, sea salt and sepiolite were mined during the instability brought on by the ongoing Somali Civil War, although the conflict halted oil exploration which had taken place in the 1980s.