LEGEND POST-ORDOVICIAN OVERLAP SEQUENCES POST-ORDOVICIAN INTRUSIVE ROCKS Carboniferous (Viséan to Westphalian) Mesozoic Fluviatile and lacustrine, siliciclastic and minor carbonate rocks; intercalated marine, Gabbro and diabase siliciclastic, carbonate and evaporitic rocks; minor coal beds and mafic volcanic flows Devonian and Carboniferous Devonian and Carboniferous (Tournaisian) Granite and high silica granite (sensu stricto), and other granitoid intrusions Fluviatile and lacustrine sandstone, shale, conglomerate and minor carbonate rocks that are posttectonic relative to mid-Paleozoic orogenies Fluviatile and lacustrine, siliciclastic and carbonate rocks; subaerial, bimodal Silurian and Devonian volcanic rocks; may include some Late Silurian rocks Gabbro and diorite intrusions, including minor ultramafic phases Silurian and Devonian Posttectonic gabbro-syenite-granite-peralkaline granite suites and minor PRINCIPAL Shallow marine sandstone, conglomerate, limey shale and thin-bedded limestone unseparated volcanic rocks (northwest of Red Indian Line); granitoid suites, varying from pretectonic to syntectonic, relative to mid-Paleozoic orogenies (southeast of TECTONIC DIVISIONS Silurian Red Indian Line) TACONIAN Bimodal to mainly felsic subaerial volcanic rocks; includes unseparated ALLOCHTHON sedimentary rocks of mainly fluviatile and lacustrine facies GANDER ZONE Stratified rocks Shallow marine and non-marine siliciclastic sedimentary rocks, including Cambrian(?) and Ordovician 0 150 sandstone, shale and conglomerate Quartzite, psammite, semipelite and pelite, including minor black slate, kilometres conglomerate, limestone, mafic and felsic volcanic rocks, and unseparated migmatitic rocks HUMBER ZONE Stratified rocks Migmatitic schist, gneiss, and minor amphibolite, derived in whole, or HUMBER Taconic allochthons and related rocks in part from Cambrian(?) and Ordovician protoliths ZONE Early and Middle Ordovician BAIE VERTE Shale-matrix melange, containing blocks of ophiolitic, rift, continental LINE Intrusive rocks slope and foreland basin rocks Ordovician DUNNAGE ZONE Granite intrusions Cambrian to Middle Ordovician RED INDIAN Continental slope facies: (within Taconic allochthons) sandstone, shale, LINE GANDER thin-bedded to conglomeratic carbonate rocks, chert, mafic volcanic and minor metamorphic rocks; (within autochthon) metamorphic equivalents, including AVALON ZONE N ZONE I T S L Stratified rocks A E unseparated rocks of Middle Ordovician foreland basin and Neoproterozoic to TACONIAN B B ALLOCHTHON B Cambrian rift facies Central Newfoundland U IC ) S S e E A in E B l N Neoproterozoic and Cambrian A B K R O T U A L R Z U G Siliciclastic sedimentary and volcanic rocks; amphibolitic and quartzofeldspathic L ( B Neoproterozoic and Cambrian R U E S schist, gneiss and migmatite; includes unseparated granitoid and gabbroic intrusions E R Rift and transitional continental slope facies: (within Taconic allochthons) E D IV E R N sandstone, shale, conglomerate and mafic volcanic rock; (within autochthon) ZO E UB N E S O metamorphic equivalents, including unseparated probable basement rocks and Eastern Newfoundland BZ K ME U A A S L Neoproterozoic to Early Ordovician D Cambrian to Ordovician rocks of continental slope and foreland basin facies T R L S E U Shallow marine, mainly fine grained, siliciclastic sedimentary rocks, including E IT D TR O N A O L A F N P . K G R minor unseparated limestone and volcanic rocks X T C E NOEL E M A E M N D PAUL'S R O N AVALON Autochthon and parautochthon O Z POST-ORDOVICIAN LINE C B A E U G Middle Ordovician Neoproterozoic OVERLAP SEQUENCES N S S R ZO IT E ZONE UB LO V Fluviatile and shallow marine siliciclastic sedimentary rocks, including minor E S O Shallow marine limestone, shale and sandstone G P R G X D O AE E E N ELP unseparated limestone and bimodal volcanic rocks G SI ME E T. A N S B O B Z Early and Middle Ordovician AY U B B S SU Foreland basin facies: sandstone and shale turbidites, and carbonate breccia; Bimodal, mainly subaerial volcanic rocks, including unseparated calcareous and black shale, carbonate breccia and conglomerate siliciclastic sedimentary rocks AY B E LT AG U IT T A RM L F E AU Shelf facies and marginal facies of foreland basin: limestone and dolostone Marine deltaic siliciclastic sedimentary rocks GE H F AN T R UL NG FA LO AY Sandstone and shale turbidites, including minor unseparated tillite, R Cambrian PE CA Shelf facies: thin-bedded limestone, dolostone and shale olistostromes and volcanic rocks Belle PARADISE Bimodal, submarine to subaerial volcanic rocks, including minor SOUND Isle Neoproterozoic and Cambrian FAULT Rift and transitional shelf facies: non-marine conglomerate, sandstone and mafic siliciclastic sedimentary rocks volcanic rocks; marine shale, sandstone, limestone, dolostone and limestone conglomerate Pillow basalt, mafic volcaniclastic rocks, siliciclastic sedimentary rocks, and minor limestone and chert Neoproterozoic to Middle Ordovician Undivided siliciclastic and carbonate rocks; excludes siliciclastic rocks west Intrusive rocks of Long Range Mountains Neoproterozoic to Cambrian Mafic intrusions Intrusive rocks Neoproterozoic Granitoid intrusions, including unseparated mafic phases Pistolet Bay Granitoid intrusions Mafic dykes Basement rocks Paleoproterozoic(?) and Mesoproterozoic Granitoid intrusions St. Anthony Mafic and anorthositic intrusions Hare Bay Granitoid orthogneiss and subordinate mafic gneiss and paragneiss DUNNAGE ZONE Stratified rocks Late Ordovician and Early Silurian LABRADOR Melange, containing volcanic and sedimentary blocks of Middle and Late (?) Ordovician age Turbidites consisting of sandstone, shale and conglomerate; other marine sedimentary rocks NEWFOUNDLAND Middle and Late Ordovician Llandeilo to Ashgill black shale, slate and argillite, including subordinate chert Roddicton and greywacke Middle Ordovician Breccia, shale and sandstone Port au Choix Cambrian to Middle Ordovician Canada bay Melange, containing sedimentary and volcanic blocks of Cambrian to Ordovician age Port Saunders Modified from: Marine siliciclastic sedimentary rocks, including slate, shale, argillite, siltstone, Geology of the Island of Newfoundland by S. P. Colman-Sadd, P. Hayes, and sandstone, conglomerate, and minor unseparated carbonate, volcanic and intrusive I. Knight. Map 90-01. rocks, and schist, gneiss and migmatite Recommended citation: Submarine mafic, intermediate and felsic volcanic rocks, including mafic volcanic Colman-Sadd, S. P., Hayes, J. P., and Knight, I., 2000: Geology of the Island of rocks of ophiolite complexes; includes unseparated intrusive, sedimentary and Newfoundland (digital version of Map 90-01 with minor revisions). Newfoundland metamorphic rocks Department of Mines and Energy, Geological Survey, Map 2000-30, scale 1:1 000 000, Open File ? Intrusive rocks Cambrian and Ordovician Copies of this map may be obtained from the Geoscience Publications and Information Granitoid intrusions, including trondhjemite of ophiolite complexes Section, Geological Survey, Department of Mines and Energy, P.O. Box 8700, St. John’s, Newfoundland, Canada, A1B 4J6. Mafic intrusions, including unseparated granitoid rocks, and gabbro, diabase and trondhjemite of ophiolite complexes Daniel's Harbour E-mail: [email protected] http://www.geosurv.gov.nf.ca Ultramafic rocks of ophiolite complexes Parsons Pond White Bay Baie Verte La Scie Cow Head Tilt Cove Sop's Arm Nippers Harbour Jackson's Arm Green Fogo Bay Notre Dame Bay Twillingate Rocky Harbour Springdale ATLANTIC Carmanville Lumsden Cape Freels OCEAN Deer Lake Lewisporte Bay of Wesleyville Islands ke La Botwood r e e D ke a L Gander d n ra Hinds G Lake er Corner Gand Grand La Brook ke Falls Buchans Bonavista Bay Lake Bonavista n ia d n Port au Port I Bay d Re Catalina Stephenville Musgravetown St. St. George’s George's Trinity Bay Meelpaeg Lake (reservoir) Random a Clarenville By Island Bay de Verde Long Pond Reservoir y y t Head of Bay i a n B i D'Espoir r T Cape St. n St. Alban's o Francis i t p e c Carbonear n o Hr. Grace C Grand St.John's Bruit Burgeo Hermitage Bay d n Channel-Port a s aux Basques François Il n e e h Ramea y s a a r e Hr. B M Breton ne Bay Bulls tu or F Argentia Placentia Marystown Grand Placentia Cape Broyle Bank Bay Ferryland Scale 1:1 000 000 St. Mary's St. Lawrence 0 20 40 60 80 100 St. Mary’s Trepassey kilometres Bay Cape Race Mistaken Point.