00000nam 2200000zi 4500 9.903837 CaOODSP 20251031142448 m o d f cr mn||||||||| 211005t20212021oncab ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-nu M183-2/8820E-PDF Hadlari, T., 1974- author. Early Cambrian maximum depositional age for the upper Yelverton Formation, northern Ellesmere Island, Nunavut / T. Hadlari and W.A. Matthews. [Ottawa] : Geological Survey of Canada, 2021. ©2021 1 online resource (15 pages) : illustrations (some colour), colour map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Open file ; 8820 Includes bibliographical references (pages 14-15). "U-Pb detrital zircon analysis of sandstone samples collected from northern Ellesmere Island during the summer of 2017 provides new depositional age constraints for the Yelverton Formation. Two samples from the same outcrop locality near the top of the formation have yielded an Early Cambrian maximum depositional age (MDA) of 532.1 ± 9.1 Ma. Because the overlying Grantland Formation contains late Early Cambrian trilobites (Oldhamia), we conclude that the uppermost Yelverton Formation is Early Cambrian. A near-depositional age fraction of detrital zircon is interpreted as a proxy for the age of igneous rocks within the Yelverton Formation, which is conservatively estimated as ranging from 551.1 ± 8.9 Ma to 532.1 ± 9.1 Ma"--Abstract, page 1. Geochronometry Nunavut Ellesmere Island. Uranium-lead dating Nunavut Ellesmere Island. Geology, Stratigraphic Cambrian. Géochronométrie Nunavut Ellesmere, Île d'. Datation Méthode uranium-plomb Nunavut Ellesmere, Île d'. Stratigraphie Cambrien. Geological Survey of Canada, issuing body. Open file (Geological Survey of Canada) 8820. (CaOODSP)9.506878 PDF 2.29 MB https://publications.gc.ca/collections/collection_2021/rncan-nrcan/m183-2/M183-2-8820-eng.pdf HTML N/A https://doi.org/10.4095/328836