DOCSLIB.ORG

Migration of the Acadian Orogen and Foreland Basin Across the Northern Appalachians1

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Migration of the Acadian Orogen and Foreland Basin Across the Northern Appalachians1 -1 - U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Migration of the Acadian Orogen and Foreland Basin across the Northern Appalachians1 By Dwight C. Bradley2, Robert D. Tucker3, Daniel R. Lux4, Anita G. Harris5, and D. Colin McGregor6 OPEN-FILE REPORT 98-770 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. government. 1998 1 This Open-File Report is being released in advance of a Professional Paper with the same title and authors, which is working its way through the publication process as of November 1998. 2 U.S. Geological Survey, 4200 University Drive, Anchorage, AK 99508. [email protected] 3 Dept. of Earth and Planetary Sciences, Washington University, 1 Brookings Drive, St. Louis, MO 63130 4 Dept. of Geological Sciences, University of Maine, Orono, ME 04469 5-U.S. Geological Survey, MS 926A, Reston, VA 20192 6 Retired; formerly at Geological Survey of Canada, 601 Booth St., Ottawa, Ontario, K1A OE8 -2- CONTENTS Abstract ..................................................................................................... 4 Introduction................................................................................................. 4 Acknowledgments......................................................................................... 5 Regional Geology.......................................................................................... 6 Determining the Timing of Collisional Orogeny from the Rock Record ............................ 9 Paleontological and Stratigraphic Evidence for the Timing of Acadian Orogenesis............... 11 Passamaquoddy Bay, Maine and New Brunswick............................................... 11 Fredericton Trough, Maine and New Brunswick ................................................ 11 Canterbury Inlier, New Brunswick ............................................................... 11 Carlisle Area, New Brunswick..................................................................... 15 Presque Isle Quadrangle, Maine.................................................................... 15 Central Maine Basin.................................................................................. 16 Littleton and Vicinity, New Hampshire............................................................ 17 Southwestern Moose River Synclinorium, Maine................................................ 17 Northeastern Moose River Synclinorium, Maine................................................. 19 Traveler-Chesuncook Area, Maine ................................................................ 19 Munsungun Anticlinorium, Maine ................................................................. 20 Pennington Anticlinorium, Maine ................................................................. 20 Madawaska Region, New Brunswick............................................................. 21 LaPatrie and Ste. Cecile de Whitton, Eastern Townships, Quebec............................. 22 Northwest Margin of the Connecticut Valley-Gaspe Basin, Quebec .......................... 22 Montreal, Quebec..................................................................................... 22 Isotopic Ages of Acadian Plutons ...................................................................... 23 U/Pb Analytical Methods............................................................................ 23 ^Ar/^Ar Analytical Methods.......................................................................26 Ludlow, Pridoli, and Lochkovian Plutons........................................................ 26 Early Emsian Plutons................................................................................ 28 Late Emsian to Eifelian Plutons..................................................................... 34 Givetian to Early Tournaisian Plutons............................................................. 34 The Silurian-Devonian Time Scale...................................................................... 36 Location Through Time of the Acadian Deformation Front and Foreland Basin ................. 36 Palinspastic Considerations......................................................................... 40 Early Ludlow ......................................................................................... 42 Early Lochkovian..................................................................................... 42 Pragian................................................................................................. 43 Early Emsian.......................................................................................... 43 Late Emsian to Early Eifelian ....................................................................... 43 Late Eifelian to Early Givetian...................................................................... 44 Base of Frasnian...................................................................................... 44 Implications................................................................................................ 45 Age of the Acadian Orogeny........................................................................ 45 Rate and Trajectory of Deformation-Front Migration............................................ 45 Physical Setting of Magmatism..................................................................... 46 Syn-Collisional Versus Pre-Collisional Plate Geometry......................................... 46 Hinterland Deformation Regimes and Regional Partitioning of Acadian Deformation....... 47 Foreland Deformation Regimes .................................................................... 48 Suggestions for Further Work .......................................................................... 48 References Cited.......................................................................................... 49 -3- FIGURES Figure 1. Geologic map of Maine and adjacent areas.................................................. 7 Figure 2. Major paleogeographic elements and structures in Maine and adjacent areas........... 8 Figure 3. Model of two-plate collision................................................................. 10 Figure 4. Stratigraphic sections bearing on the age of Acadian deformation ...................... 12 Figure 5. Conodont and palynological ages of samples dated in this study. ...................... 18 Figure 6. Map of Maine and adjacent areas showing ages of Acadian plutons.................... 24 Figure 7. U/Pb concordia diagrams.................................................................... 25 Figures. 40Ar/39Ar age spectra.......................................................................... 27 Figure 9. Photomicrographs of contact-metamorphic textures...................................... 29 Figure 10. Map showing positions of the Acadian deformation front.............................. 37 Figure 11. Map showing positions of the leading edge of the Acadian foreland basin........... 38 Figure 12. Paleogeographic maps of Maine and adjacent areas..................................... 39 Figure 13. Map showing local estimates of shortening.............................................. 41 TABLES (at end of document) Table 1. Palynological ages.............................................................................. 60 Table 2. Conodont ages.................................................................................. 62 Table 3. Pluton ages plotted in fig. 7................................................................... 66 Table 4. Zircon data. .....................................................................................70 Table 5. 40/39 data.......................................................................................72 Table 6. Comparison between various time scales.................................................... 78 Table 7. Data used in estimating Acadian and younger shortening in fig. 13...................... 79 -4- ABSTRACT We reconstruct seven sequential positions of the Acadian deformation front and foreland basin as these features migrated northwestward across Maine from Late Silurian to Middle Devonian 40 ^9 time. The reconstructions are based on (1) U/Pb and Arf Ar ages of pre-, syn-, and post-tectonic plutons; (2) conodont and palynomorph ages of key strata that predate or postdate the local age of deformation; and (3) interpretations of the depositional settings of these strata: far-foreland, foreland- basin, inner trench slope, and erogenic hinterland. Tight correlations between isotopically and paleontologically dated events are made possible by recent improvements in the Silurian-Devonian time scale. In early Ludlow time (-423 Ma), the deformation front must have lain near the present midline of the Fredericton basin, between the post-tectonic Pocomoonshine pluton (423 Ma) to the southeast, and the graptolitic Smalls Falls Formation of the same age, 70 km across strike to the northwest. During early Lochkovian time (-417 Ma), the deformation front was near the present midline of the Central Maine basin, as recorded by the northwestward advance of slope deposits of the Carrabassett Formation across axially-transported turbidites of the Madrid Formation. The early Emsian (406-407 Ma) deformation front lay along or near the Lobster anticlinorium; its position is bracketed between the post-tectonic Russell
Load more

Recommended publications
  • Stratographic Coloumn of Iowa
    Iowa Stratographic Column November 4, 2013 QUATERNARY Holocene Series DeForest Formation Camp Creek Member Roberts Creek Member Turton Submember Mullenix Submember Gunder Formation Hatcher Submember Watkins Submember Corrington Formation Flack Formation Woden Formation West Okoboji Formation Pleistocene Series Wisconsinan Episode Peoria Formation Silt Facies Sand Facies Dows Formation Pilot Knob Member Lake Mills Member Morgan Member Alden Member Noah Creek Formation Sheldon Creek Formation Roxana/Pisgah Formation Illinoian Episode Loveland Formation Glasford Formation Kellerville Memeber Pre-Illinoian Wolf Creek Formation Hickory Hills Member Aurora Memeber Winthrop Memeber Alburnett Formation A glacial tills Lava Creek B Volcanic Ash B glacial tills Mesa Falls Volcanic Ash Huckleberry Ridge Volcanic Ash C glacial tills TERTIARY Salt & Pepper sands CRETACEOUS "Manson" Group "upper Colorado" Group Niobrara Formation Fort Benton ("lower Colorado ") Group Carlile Shale Greenhorn Limestone Graneros Shale Dakota Formation Woodbury Member Nishnabotna Member Windrow Formation Ostrander Member Iron Hill Member JURASSIC Fort Dodge Formation PENNSYLVANIAN (subsystem of Carboniferous System) Wabaunsee Group Wood Siding Formation Root Formation French Creek Shale Jim Creek Limestone Friedrich Shale Stotler Formation Grandhaven Limestone Dry Shale Dover Limestone Pillsbury Formation Nyman Coal Zeandale Formation Maple Hill Limestone Wamego Shale Tarkio Limestone Willard Shale Emporia Formation Elmont Limestone Harveyville Shale Reading Limestone Auburn
    [Show full text]
  • Preliminary Catalog of the Sedimentary Basins of the United States
    Preliminary Catalog of the Sedimentary Basins of the United States By James L. Coleman, Jr., and Steven M. Cahan Open-File Report 2012–1111 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2012 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Suggested citation: Coleman, J.L., Jr., and Cahan, S.M., 2012, Preliminary catalog of the sedimentary basins of the United States: U.S. Geological Survey Open-File Report 2012–1111, 27 p. (plus 4 figures and 1 table available as separate files) Available online at http://pubs.usgs.gov/of/2012/1111/. iii Contents Abstract ...........................................................................................................................................................1
    [Show full text]
  • Tectonics and Sedimentation in Foreland Basins: Results from the Integrated Basin Studies Project
    Downloaded from http://sp.lyellcollection.org/ by guest on September 30, 2021 Tectonics and sedimentation in foreland basins: results from the Integrated Basin Studies project ALAIN MASCLE 1 & CAI PUIGDEFABREGAS 2,3 IIFP School, 228-232 avenue Napoldon Bonaparte, 92852 Rueil-Malmaison Cedex, France (e-mail: [email protected]) 2Norsk Hydro Research Centre, Bergen, Norway. 3Institut de Ciences de la Terra, (?SIC, Barcelona, Spain. Why foreland basins? to a better understanding of some basic interact- ing tectonic, sedimentary and hydrologic pro- Over the last ten years or so, since the Fribourg cesses (More & Vrolijk 1992; Touret & van meeting in 1985 (Homewood et al. 1986), the Hinte 1992). Additional data have also been attention given by sedimentologists and struc- obtained through the development of analogue tural geologists to the geology of foreland basins and numerical models (Larroque et al. 1992; has been growing continuously, parallel to the Zoetemeijer 1993). The physical parameters increase of co-operative links between scientists controlling the forward propagation of d6colle- from the two disciplines. A number of reasons ments and thrusts (fluid pressure, roughness, lie behind this development. Attempting to sediment thickness, etc.) have been determined understand the growth of an orogen without and tested. The relationships between rapidly paying due attention to the stratigraphic record subsiding piggyback basins and growing ramp of the derived sediments would be unrealistic. It anticlines have also been imaged, although the would, moreover, be equally unrealistic to con- lack of deep-sea well control still prevents accu- struct restored sections across the chain without rate sedimentological studies. More significant considering the constraints imposed by the has been the progress in our understanding of basin-fill architecture, or to describe the basin- the role of fluids and pore pressure in the fill evolution disregarding the development of development of thrust belts.
    [Show full text]
  • Geotectonic Model of the Alpine Development of Lakavica Graben in the Eastern Part of the Vardar Zone in the Republic of Macedonia
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by UGD Academic Repository Geologica Macedonica, Vol. 27, No. 1, pp. 87–93 (2013) GEOME 2 ISSN 0352 – 1206 Manuscript received: May 17, 2013 UDC: 551.245.03(497.71/.73) Accepted: October 25, 2013 Original scientific paper GEOTECTONIC MODEL OF THE ALPINE DEVELOPMENT OF LAKAVICA GRABEN IN THE EASTERN PART OF THE VARDAR ZONE IN THE REPUBLIC OF MACEDONIA Goše Petrov, Violeta Stojanova, Gorgi Dimov Faculty of Natural and Technical Sciences, “Goce Delčev” University, P.O.Box 201, MK 2000 Štip, Republic of Macedonia [email protected]//[email protected] A b s t r a c t: Lakavica graben is located in the eastern subzone of the Vardar zone, which during the Alpine orogenesis was covered with very complex processes of tectogenesis. On the area of about 200 km2, in the Lakavica graben, are present geological units from the oldest geological periods (Precam- brian) to the youngest (Neogene and Quaternary). Tectonic structure, or rupture tectonic, is very intense developed and gives possibility for analysis of the geotectonic processes in the Alpine orogen phase. This paper presents the possible model for geotectonic processes in the Lakavica graben, according to which can be generalized geotectonic processes in the Vardar zone during the Alpine orogeny. Key words: Lakavica graben; geotectonic model; Alpine orogeny; Vardar zone INTRODUCTION Vardar zone as a tectonic unit, for the first niki Gulf (Greece), than bent eastward and crosses time, is separated and showed on the "Geological- the ophiolite zone Izmir–Ankara (Turkey).
    [Show full text]
  • Revised Correlation of Silurian Provincial Series of North America with Global and Regional Chronostratigraphic Units 13 and D Ccarb Chemostratigraphy
    Revised correlation of Silurian Provincial Series of North America with global and regional chronostratigraphic units 13 and d Ccarb chemostratigraphy BRADLEY D. CRAMER, CARLTON E. BRETT, MICHAEL J. MELCHIN, PEEP MA¨ NNIK, MARK A. KLEFF- NER, PATRICK I. MCLAUGHLIN, DAVID K. LOYDELL, AXEL MUNNECKE, LENNART JEPPSSON, CARLO CORRADINI, FRANK R. BRUNTON AND MATTHEW R. SALTZMAN Cramer, B.D., Brett, C.E., Melchin, M.J., Ma¨nnik, P., Kleffner, M.A., McLaughlin, P.I., Loydell, D.K., Munnecke, A., Jeppsson, L., Corradini, C., Brunton, F.R. & Saltzman, M.R. 2011: Revised correlation of Silurian Provincial Series of North America with global 13 and regional chronostratigraphic units and d Ccarb chemostratigraphy. Lethaia,Vol.44, pp. 185–202. Recent revisions to the biostratigraphic and chronostratigraphic assignment of strata from the type area of the Niagaran Provincial Series (a regional chronostratigraphic unit) have demonstrated the need to revise the chronostratigraphic correlation of the Silurian System of North America. Recently, the working group to restudy the base of the Wen- lock Series has developed an extremely high-resolution global chronostratigraphy for the Telychian and Sheinwoodian stages by integrating graptolite and conodont biostratigra- 13 phy with carbonate carbon isotope (d Ccarb) chemostratigraphy. This improved global chronostratigraphy has required such significant chronostratigraphic revisions to the North American succession that much of the Silurian System in North America is cur- rently in a state of flux and needs further refinement. This report serves as an update of the progress on recalibrating the global chronostratigraphic correlation of North Ameri- can Provincial Series and Stage boundaries in their type area.
    [Show full text]
  • Strophomenide and Orthotetide Silurian Brachiopods from the Baltic Region, with Particular Reference to Lithuanian Boreholes
    Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes PETRAS MUSTEIKIS and L. ROBIN M. COCKS Musteikis, P. and Cocks, L.R.M. 2004. Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes. Acta Palaeontologica Polonica 49 (3): 455–482. Epeiric seas covered the east and west parts of the old craton of Baltica in the Silurian and brachiopods formed a major part of the benthic macrofauna throughout Silurian times (Llandovery to Pridoli). The orders Strophomenida and Orthotetida are conspicuous components of the brachiopod fauna, and thus the genera and species of the superfamilies Plec− tambonitoidea, Strophomenoidea, and Chilidiopsoidea, which occur in the Silurian of Baltica are reviewed and reidentified in turn, and their individual distributions are assessed within the numerous boreholes of the East Baltic, particularly Lithua− nia, and attributed to benthic assemblages. The commonest plectambonitoids are Eoplectodonta(Eoplectodonta)(6spe− cies), Leangella (2 species), and Jonesea (2 species); rarer forms include Aegiria and Eoplectodonta (Ygerodiscus), for which the new species E. (Y.) bella is erected from the Lithuanian Wenlock. Eight strophomenoid families occur; the rare Leptaenoideidae only in Gotland (Leptaenoidea, Liljevallia). Strophomenidae are represented by Katastrophomena (4 spe− cies), and Pentlandina (2 species); Bellimurina (Cyphomenoidea) is only from Oslo and Gotland. Rafinesquinidae include widespread Leptaena (at least 11 species) and Lepidoleptaena (2 species) with Scamnomena and Crassitestella known only from Gotland and Oslo. In the Amphistrophiidae Amphistrophia is widespread, and Eoamphistrophia, Eocymostrophia, and Mesodouvillina are rare. In the Leptostrophiidae Mesoleptostrophia, Brachyprion,andProtomegastrophia are com− mon, but Eomegastrophia, Eostropheodonta, Erinostrophia,andPalaeoleptostrophia are only recorded from the west in the Baltica Silurian.
    [Show full text]
  • From Orogeny to Rifting: When and How Does Rifting Begin? Insights from the Norwegian ‘Reactivation Phase’
    EGU21-469 https://doi.org/10.5194/egusphere-egu21-469 EGU General Assembly 2021 © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. From orogeny to rifting: when and how does rifting begin? Insights from the Norwegian ‘reactivation phase’. Gwenn Peron-Pinvidic1,2, Per Terje Osmundsen2, Loic Fourel1, and Susanne Buiter3 1NGU - Geological Survey of Norway, 7040 Trondheim, Norway 2NTNU - Norwegian University of Science and Technology, 7491 Trondheim, Norway 3Tectonics and Geodynamics, RWTH Aachen University, 52064 Aachen, Germany Following the Wilson Cycle theory, most rifts and rifted margins around the world developed on former orogenic suture zones (Wilson, 1966). This implies that the pre-rift lithospheric configuration is heterogeneous in most cases. However, for convenience and lack of robust information, most models envisage the onset of rifting based on a homogeneously layered lithosphere (e.g. Lavier and Manatschal, 2006). In the last decade this has seen a change, thanks to the increased academic access to high-resolution, deeply imaging seismic datasets, and numerous studies have focused on the impact of inheritance on the architecture of rifts and rifted margins. The pre-rift tectonic history has often been shown as strongly influencing the subsequent rift phases (e.g. the North Sea case - Phillips et al., 2016). In the case of rifts developing on former orogens, one important question relates to the distinction between extensional structures formed during the orogenic collapse and the ones related to the proper onset of rifting. The collapse deformation is generally associated with polarity reversal along orogenic thrusts, ductile to brittle deformation and important crustal thinning with exhumation of deeply buried rocks (Andersen et al., 1994; Fossen, 2000).
    [Show full text]
  • Development of the Rocky Mountain Foreland Basin: Combined Structural
    University of Montana ScholarWorks at University of Montana Graduate Student Theses, Dissertations, & Professional Papers Graduate School 2007 DEVELOPMENT OF THE ROCKY MOUNTAIN FORELAND BASIN: COMBINED STRUCTURAL, MINERALOGICAL, AND GEOCHEMICAL ANALYSIS OF BASIN EVOLUTION, ROCKY MOUNTAIN THRUST FRONT, NORTHWEST MONTANA Emily Geraghty Ward The University of Montana Follow this and additional works at: https://scholarworks.umt.edu/etd Let us know how access to this document benefits ou.y Recommended Citation Ward, Emily Geraghty, "DEVELOPMENT OF THE ROCKY MOUNTAIN FORELAND BASIN: COMBINED STRUCTURAL, MINERALOGICAL, AND GEOCHEMICAL ANALYSIS OF BASIN EVOLUTION, ROCKY MOUNTAIN THRUST FRONT, NORTHWEST MONTANA" (2007). Graduate Student Theses, Dissertations, & Professional Papers. 1234. https://scholarworks.umt.edu/etd/1234 This Dissertation is brought to you for free and open access by the Graduate School at ScholarWorks at University of Montana. It has been accepted for inclusion in Graduate Student Theses, Dissertations, & Professional Papers by an authorized administrator of ScholarWorks at University of Montana. For more information, please contact [email protected]. DEVELOPMENT OF THE ROCKY MOUNTAIN FORELAND BASIN: COMBINED STRUCTURAL, MINERALOGICAL, AND GEOCHEMICAL ANALYSIS OF BASIN EVOLUTION ROCKY MOUNTAIN THRUST FRONT, NORTHWEST MONTANA By Emily M. Geraghty Ward B.A., Whitman College, Walla Walla, WA, 1999 M.S., Washington State University, Pullman, WA, 2002 Dissertation presented in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Geology The University of Montana Missoula, MT Spring 2007 Approved by: Dr. David A. Strobel, Dean Graduate School James W. Sears, Chair Department of Geosciences Julia A. Baldwin Department of Geosciences Marc S. Hendrix Department of Geosciences Steven D.
    [Show full text]
  • Pan-African Orogeny 1
    Encyclopedia 0f Geology (2004), vol. 1, Elsevier, Amsterdam AFRICA/Pan-African Orogeny 1 Contents Pan-African Orogeny North African Phanerozoic Rift Valley Within the Pan-African domains, two broad types of Pan-African Orogeny orogenic or mobile belts can be distinguished. One type consists predominantly of Neoproterozoic supracrustal and magmatic assemblages, many of juvenile (mantle- A Kröner, Universität Mainz, Mainz, Germany R J Stern, University of Texas-Dallas, Richardson derived) origin, with structural and metamorphic his- TX, USA tories that are similar to those in Phanerozoic collision and accretion belts. These belts expose upper to middle O 2005, Elsevier Ltd. All Rights Reserved. crustal levels and contain diagnostic features such as ophiolites, subduction- or collision-related granitoids, lntroduction island-arc or passive continental margin assemblages as well as exotic terranes that permit reconstruction of The term 'Pan-African' was coined by WQ Kennedy in their evolution in Phanerozoic-style plate tectonic scen- 1964 on the basis of an assessment of available Rb-Sr arios. Such belts include the Arabian-Nubian shield of and K-Ar ages in Africa. The Pan-African was inter- Arabia and north-east Africa (Figure 2), the Damara- preted as a tectono-thermal event, some 500 Ma ago, Kaoko-Gariep Belt and Lufilian Arc of south-central during which a number of mobile belts formed, sur- and south-western Africa, the West Congo Belt of rounding older cratons. The concept was then extended Angola and Congo Republic, the Trans-Sahara Belt of to the Gondwana continents (Figure 1) although West Africa, and the Rokelide and Mauretanian belts regional names were proposed such as Brasiliano along the western Part of the West African Craton for South America, Adelaidean for Australia, and (Figure 1).
    [Show full text]
  • Paleozoic 3: Alabama in the Paleozoic
    UNIVERSITY OF SOUTH ALABAMA GY 112: Earth History Paleozoic 3: Alabama in the Paleozoic Instructor: Dr. Douglas W. Haywick Last Time The Paleozoic Part 2 1) Back to Newfoundland 2) Eastern Laurentian Orogenies (Appalachians) 3) Other Laurentian Orogenies (Antler, Ouachita) (web notes 25) Laurentia (Paleozoic North America) Even though this coastline of Laurentia was a passive continental margin, a plate tectonic boundary was rapidly approaching… A B A B Laurentia (Paleozoic North America) The resulting Taconic Orogeny first depressed the seafloor Laurentia (localized transgression) and A Island arc then pushed previously deposited passive continental B margin sediments up into thrust fault mountains. Baltica There was only minimal metamorphism and igneous A intrusions. B Middle Ordovician Laurentia (Paleozoic North America) Laurentia Baltica Middle Ordovician Laurentia (Paleozoic North America) Laurentia Baltica Middle Ordovician Laurentia (Paleozoic North America) The next tectonic event (the Acadian Orogeny) was caused Laurentia by the approach of Baltica A B Baltica A B Baltica Baltica Late Ordovician Laurentia (Paleozoic North America) The Acadian Orogeny was more extensive and more intense (metamorphism and A lots of igneous intrusions) B A B Early Devonian Laurentia (Paleozoic North America) The Acadian Orogeny was more extensive and more intense (metamorphism and lots of igneous intrusions) Early Devonian Laurentia (Paleozoic North America) Lastly, along comes Gondwanna and…. …well you get the idea. A B B A B Mississippian Laurentia (Paleozoic North America) Lastly, along comes Gondwanna and…. …well you get the idea. A B B A B Pennsylvannian Suture zone Laurentia (Paleozoic North America) Lastly, along comes Gondwanna and…. …well you get the idea.
    [Show full text]
  • Lithospheric Folding and Sedimentary Basin Evolution: a Review and Analysis of Formation Mechanisms Sierd Cloething, Evgenii Burov
    Lithospheric folding and sedimentary basin evolution: a review and analysis of formation mechanisms Sierd Cloething, Evgenii Burov To cite this version: Sierd Cloething, Evgenii Burov. Lithospheric folding and sedimentary basin evolution: a review and analysis of formation mechanisms. Basin Research, Wiley, 2011, 23 (3), pp.257-290. 10.1111/j.1365- 2117.2010.00490.x. hal-00640964 HAL Id: hal-00640964 https://hal.archives-ouvertes.fr/hal-00640964 Submitted on 24 Nov 2011 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Basin Research For Review Only Page 1 of 91 Basin Research 1 2 3 4 1 Lithospheric folding and sedimentary basin evolution: 5 6 2 a review and analysis of formation mechanisms 7 8 9 3 10 11 4 12 13 5 14 a,* b 15 6 Sierd Cloetingh and Evgenii Burov 16 7 17 18 8 aNetherlands ResearchFor Centre forReview Integrated Solid EarthOnly Sciences, Faculty of Earth and Life 19 20 9 Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands. 21 10 22 23 11 bUniversité Pierre et Marie Curie, Laboratoire de Tectonique, 4 Place Jussieu, 24 25 12 75252 Paris Cedex 05, France.
    [Show full text]
  • Annual Report 2017–2018 Table of Contents
    Annual Report 2017–2018 Table of Contents 2 Message From the Chair 4 Message From the CEO 7 Beyond Canada 150: Building Legacies in the Capital 12 The Year in Review 37 Leading by Example 41 Looking Forward 44 Corporate Governance 54 Management Discussion and Analysis 78 Financial Statements 110 Appendices 2017–2018 Performance Highlights Over 822,000 visitors participated in the National Capital Commission’s (NCC) Canada 150 activities 822,000 and programs. A total of 300,000 Canada 150 tulips were planted in the Capital. Over 4.5 million anniversary tulips were 300,000 planted across Canada. The Rideau Canal Skateway welcomed 986,983 visitors 986,983 in the 2017–2018 season—374,072 more than last year. More than 117,500 visitors passed through the 117,566 Gatineau Park Visitor Centre at 33 Scott Road. The NCC recorded over 1 million social media interactions across all platforms, an increase of 1,091,916 190% compared with the past fiscal year. The NCC’s rental portfolio generated $20.4 million $20.4M in revenues. Cover: Unveiled in September 2017, the National Holocaust Monument, entitled Landscape of Loss, Memory and Survival, ensures that the lessons of the Holocaust, as well as the contribution that Holocaust survivors have made to Canada, remain within the national consciousness for generations to come. 1 Annual Report 2017–2018 NATIONAL CAPITAL COMMISSION MESSAGE FROM THE CHAIR When I look back over the past year, my first as chair of the National Capital Commission (NCC), I am happy to report that I see an impressive organization, staffed by innovative and inspired Canadians, pursuing an ambitious agenda to build a world-class capital.
    [Show full text]