The Denault Formation is a Precambrian group of rocks, occurring in the Labrador Trough, which have an exceptionally high content of carbonate for the era. The main mineral is dolomite. Some sections are near-pure dolostone while others contain abundant chalcedony, chert, or quartz in mixture with dolomite.https://ftp.maps.canada.ca/pub/nrcan_rncan/publications/STPublications_PublicationsST/123/123903/bu_102.pdf J.A. Donaldson, 1963. Stromatolites in the Denault Formation, Marion Lake, Coast of Labrador, Newfoundland. Geological Survey of Canada, Bulletin 102 In the vicinity of Wabush, dolomitic marble and calcitic marble are present; some dolomitic marble sections contain inclusions of chlorite schisthttps://www.gov.nl.ca/iet/files/mines-julienne-geofiles-023g-0220.pdf Wabush Lake Map 80-1
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