Assertion: magnetite | /r/AtLocation | banded iron formations
Facets:
value: as both detrital grains
type: MANNER
value: in lake and marine sediments
type: LOCATION
Source sentences:
text: In addition to igneous rocks, magnetite also occurs in sedimentary rocks, including banded iron formations and in lake and marine sediments as both detrital grains and as magnetofossils.