Late Cretaceous paleogeography of Wrangellia: Paleomagnetism of the MacColl Ridge Formation, southern Alaska, revisited

Abstract

Research Article| October 01, 2001 Late Cretaceous paleogeography of Wrangellia: Paleomagnetism of the MacColl Ridge Formation, southern Alaska, revisited John A. Stamatakos; John A. Stamatakos 1Center for Nuclear Waste Regulatory Analyses, Southwest Research Institute, San Antonio, Texas 78238, USA Search for other works by this author on: GSW Google Scholar Jeffrey M. Trop; Jeffrey M. Trop 2Department of Geology, Bucknell University, Lewisburg, Pennsylvania 17837, USA Search for other works by this author on: GSW Google Scholar Kenneth D. Ridgway Kenneth D. Ridgway 3Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907, USA Search for other works by this author on: GSW Google Scholar Geology (2001) 29 (10): 947–950. https://doi.org/10.1130/0091-7613(2001)029<0947:LCPOWP>2.0.CO;2 Article history received: 18 Jan 2001 rev-recd: 19 Jun 2001 accepted: 21 Jun 2001 first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation John A. Stamatakos, Jeffrey M. Trop, Kenneth D. Ridgway; Late Cretaceous paleogeography of Wrangellia: Paleomagnetism of the MacColl Ridge Formation, southern Alaska, revisited. Geology 2001;; 29 (10): 947–950. doi: https://doi.org/10.1130/0091-7613(2001)029<0947:LCPOWP>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Volcanic and sedimentary strata of the Late Cretaceous MacColl Ridge Formation were sampled and demagnetized to reevaluate the paleomagnetically derived paleolatitude of the allochthonous Wrangellia terrane. Characteristic directions from 15 sites representing ∼750 m of the MacColl Ridge Formation (80 Ma) reveal a reversed-polarity primary magnetization yielding a paleomagnetic pole at 126°E, 68°N, A95 = 9°. Comparison of this pole with the Late Cretaceous reference pole for North America indicates 15° ± 8° of latitudinal displacement (northward) and 33° ± 25° of counterclockwise rotation. In contrast to previously reported low paleolatitudes (32° ± 9°N) for the MacColl Ridge Formation, these new results place the Wrangellia terrane at a moderate paleolatitude (53° ± 8°N) in the Late Cretaceous. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.