In 1958, Erling Dorf collected a small impression flora of approximately 100 specimens from a lens of hematitic argillite in the Redmond Formation, in extreme western Labrador, 16 km south-southeast of Schefferville, Quebec. The unusual occurrence of this flora and an accomapanying insect fauna results from their deposition in apparently synorogenic, graben-filling sediments generated during Cretaceous reactivation of the late Pre-Cambrian Labrador trough, a 50 km-wide geosyncline that runs approximately 1,100 km north-south through the Labrador Peninsula. During the Cenomanian, Schefferville lay well inland at a paleolatitude of 50o North. The flora consists of at least 39 species and is dominated by angiosperms (28 species), with gymnosperms (5 species) and ferns (6 species) each making up 10% or less of the specimens collected. The dominant species are "Platanus" shirleyensis (15%), "Magnolia" speciosa (9%), Liriodendropsis simplex (7%), Cissites platanoidea (7%), and "Ficus" berthoudii (5%). The angiosperms are members of the Platanaceae, Magnoliales, Lauraceae, Menispermaceae, Chloranthaceae, and the basal Rosidae, whereas the small conifer component is formed by modern taxa such as the Taxodiaceae and "archaic" taxa like Abietites, Lariopsis, and Widdringtonites. Dating of the flora is based entirely on the ranges of the fossil plant species. Of the 25 previously described species, 22 occur in the Cenomanian Stage, with 10 ranging into earlier stages and 12 to later ones. The majority of angiosperm species fall into the notophyllous and microphyllous size classes and 26% of them are entire-margined. Although climatic interpretations based on an angiosperm flora of such an early date must be evaluated with caution, our preliminary findings indicate a temperate climate with an MAT of 9-10o C and the likelihood of regular frosts.

Key words: Cenomanian, fossil flora, Labrador, Late Cretaceous, paleoclimate