DOCSLIB.ORG

The Mystic Subterrane (Partly) Demystified: New Data from the Farewell Terrane and Adjacent Rocks, Interior Alaska GEOSPHERE; V

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
The Mystic Subterrane (Partly) Demystified: New Data from the Farewell Terrane and Adjacent Rocks, Interior Alaska GEOSPHERE; V Research Paper THEMED ISSUE: Geologic Evolution of the Alaska Range and Environs GEOSPHERE The Mystic subterrane (partly) demystified: New data from the Farewell terrane and adjacent rocks, interior Alaska GEOSPHERE; v. 14, no. 4 Julie A. Dumoulin1, James V. Jones III1, Stephen E. Box2, Dwight C. Bradley3,*, Robert A. Ayuso4, and Paul O’Sullivan5 1U.S. Geological Survey, Alaska Science Center, 4210 University Dr., Anchorage, Alaska 99508, USA https://doi.org/10.1130/GES01588.1 2U.S. Geological Survey, Spokane, Washington 99201, USA 3U.S. Geological Survey, Anchorage, Alaska 99508, USA 17 figures; 3 tables; 1 set of supplemental files 4U.S. Geological Survey, Reston, Virginia 20192, USA 5GeoSep Services, 1521 Pine Cone Road, Moscow, Idaho 83843, USA CORRESPONDENCE: [email protected] CITATION: Dumoulin, J.A., Jones, J.V., III, Box, ABSTRACT Our findings support previous models suggesting that the Farewell terrane S.E., Bradley, D.C., Ayuso, R.A., and O’Sullivan, P., 2018, The Mystic subterrane (partly) demystified: was proximal to the Alexander-Wrangellia-Peninsular composite terrane New data from the Farewell terrane and adjacent The youngest part of the Farewell terrane in interior Alaska (USA) is the during the late Paleozoic, and further suggest that such proximity continued rocks, interior Alaska: Geosphere, v. 14, no. 4, enigmatic Devonian–Cretaceous Mystic subterrane. New U-Pb detrital zircon, into (or recurred during) the Late Triassic–Early Jurassic. But middle to late p. 1501–1543, https://doi.org/10.1130/GES01588.1. fossil, geochemical, neodymium isotopic, and petrographic data illuminate the Permian detrital zircons in northern Farewell require another source; the origin of the rocks of this subterrane. The Devonian–Permian Sheep Creek For- Yukon-Tanana terrane is one possibility. Science Editor: Raymond M. Russo Guest Associate Editor: Jeff Benowitz mation yielded youngest detrital zircons of Devonian age, major detrital zircon age probability peaks between ca. 460 and 405 Ma, and overall age spectra like Received 24 July 2017 those from the underlying Dillinger subterrane. Samples are sandstones rich INTRODUCTION Revision received 23 February 2018 in sedimentary lithic clasts, and differ from approximately coeval strata to the Accepted 25 April 2018 east that have abundant volcanic lithic clasts and late Paleozoic detrital zircons. The Farewell terrane (Alaska, USA) is a regionally extensive, deformed Published online 30 May 2018 The Permian Mount Dall conglomerate has mainly carbonate and chert clasts continental fragment (Fig. 1) made up of Proterozoic, Paleozoic, and Mesozoic and yielded youngest detrital zircons of latest Pennsylvanian age. Permian rocks; understanding its history is a critical component in unraveling the com- quartz-carbonate sandstone in the northern Farewell terrane yielded abundant plex tectonic story of Alaska. Key questions center around its cratonic origins, middle to late Permian detrital zircons. its separation from and subsequent interactions with other terranes, and its Late Triassic–Early Jurassic mafic igneous rocks occur in the central and eventual incorporation into the Alaskan tectonic collage. Proterozoic and Pa- eastern Mystic subterrane. New whole-rock geochemical and isotopic data leozoic strata that form the core of Farewell are more thoroughly studied than indicate that magmas were rift related and derived from subcontinental mantle. younger parts of this terrane and have well documented ties to multiple ter- Triassic and Jurassic strata have detrital zircon age spectra much like those of ranes including the Arctic Alaska, Livengood, White Mountains, Kilbuck, and the Sheep Creek Formation, with major age populations between ca. 430 and Alexander terranes (Fig. 1; Blodgett et al., 2002; Dumoulin et al., 2002, 2014, 410 Ma. These rocks include conglomerate with clasts of carbonate ± chert and 2018b; Bradley et al., 2014). These ties are supported by diverse data sets in- youngest detrital zircons of Late Triassic age and quartz-carbonate sandstone cluding faunal assemblages, lithologic successions, and detrital zircon ages. OLD G with youngest detrital zircons of Early Jurassic age. Lithofacies indicating Overlying Devonian and younger rocks of the Mystic subterrane represent highly productive oceanographic conditions (upwelling?) bracket the main part the continued evolution of the Farewell terrane and are expected to have re- of the Mystic succession: Upper Devonian bedded barite and phosphatic Upper corded key events and interactions as it was accreted to northwestern North Devonian and Lower Jurassic rocks. America. However, the basic lithostratigraphy, geologic evolution, terrane OPEN ACCESS The youngest part of the Mystic subterrane consists of Lower Cretaceous affinities, and tectonic interactions of the Mystic remain incompletely under- (Valanginian–Aptian) limestone, calcareous sandstone, and related strata. These stood. Recent studies have elucidated specific aspects of Mystic subterrane rocks are partly coeval with the oldest parts of the Kahiltna assemblage, an geology (Malkowski and Hampton, 2014), and available data suggest link- overlap succession exposed along the southern margin of the Farewell terrane. ages between Farewell and insular terranes (i.e., Alexander and Wrangellia) outboard of western North America during the late Paleozoic and possibly later (Beranek et al., 2014; Malkowski and Hampton, 2014). Fossil and detrital This paper is published under the terms of the zircon data also indicate continuing connections between terranes of the Arc- CC-BY-NC license. *Retired. Current address: 11 Cold Brook Road, Randolph, New Hampshire 03593, USA tic realm and Siberia (Bradley et al., 2003; Colpron and Nelson, 2011) and/or © 2018 The Authors GEOSPHERE | Volume 14 | Number 4 Dumoulin et al. | Mystic subterrane Downloaded from http://pubs.geoscienceworld.org/gsa/geosphere/article-pdf/14/4/1501/4265395/1501.pdf 1501 by guest on 01 October 2021 Research Paper 168°W 165°W 162°W 159°W 156°W 153°W 150°W 147°W 144°W1141°W 138°W 135°W 132°W 129°W 126°W23°W 120°W 68°N EXPLANATION 70°N Quaternary N Other rocks Arctic Alaska–Chukotka 66°N terrane 68°N White Mountains terrane Livengood terrane B r o o k s R a n g e Innoko terrane 64°N 66°N Farewell terrane Chulitna terrane Seward CR Peninsula G Kilbuck terrane 62°N 64°N Laurentia Yukon-Tanana terrane Farewell Figure 1. Map of Alaska (USA) showing Wrangellia terrane selected terranes, adapted from Silber- 60°N ling et al. (1994). Detrital zircon sample 62°N Peninsular terrane localities: CR—Cascaden Ridge unit; terrane Alexander terrane G—Globe unit. T—Tikchik terrane. 58°N 60°N T 58°N 56°N 56°N 54°N 200 Kilometers 54°N 162°W 159°W 156°W 153°W 150°W 147°W 144°W 141°W 138°W 135°W 52°N Baltica (Ershova et al., 2016). In this paper, we use new U-Pb detrital zir- GEOLOGIC SETTING con, fossil, geochemical, neodymium isotopic, and petrographic data from the northern, central, and eastern parts of the Mystic subterrane (Fig. 2) to The Farewell terrane (Decker et al., 1994; Bundtzen et al., 1997; Bradley et illuminate the Devonian and younger evolution of the Farewell terrane as a al., 2003) is made up of a Proterozoic basement complex overlain by younger means of evaluating its tectonic interactions with other Alaskan terranes and, Proterozoic through Mesozoic rocks. Farewell exposures span an area of more ultimately, western North America. than 87,000 km2 in south-central Alaska, and they are cross-cut by and displaced The Livengood and White Mountains terranes (Fig. 1) of Silberling et al. along multiple Cenozoic strike-slip faults (Fig. 2). Rocks of the Farewell terrane (1994) have lithologic and faunal features that suggest ties to the Farewell ter- are broadly grouped into the Nixon Fork, Dillinger, and Mystic subterranes, and rane during the early Paleozoic (Blodgett et al., 2002; Dumoulin et al., 2014). Figure 3 shows the generalized lithostratigraphy and spatial associations of these New detrital zircon data from rocks in these terranes that are coeval with the three subterranes across the six geographic areas outlined in Figure 2. lower part of the Mystic subterrane allow us to test whether these linkages The Nixon Fork subterrane is a Proterozoic through Devonian carbonate extended into the middle Paleozoic. platform that overlies the only observed exposures of Proterozoic basement GEOSPHERE | Volume 14 | Number 4 Dumoulin et al. | Mystic subterrane Downloaded from http://pubs.geoscienceworld.org/gsa/geosphere/article-pdf/14/4/1501/4265395/1501.pdf 1502 by guest on 01 October 2021 Research Paper Figure 2. Generalized geologic map of the Farewell terrane and location of some detrital zircon localities discussed in text. See Figure 4 for an enlarged version of areas E and F and key to locality symbols. White areas on map are covered by snow or ice. The western and central parts of the Alaska Range extend through areas E and F. GEOSPHERE | Volume 14 | Number 4 Dumoulin et al. | Mystic subterrane Downloaded from http://pubs.geoscienceworld.org/gsa/geosphere/article-pdf/14/4/1501/4265395/1501.pdf 1503 by guest on 01 October 2021 Research Paper Figure 3. Stratigraphy of the Mystic subterrane; data sources are given in text. See Figure 2 for location of areas A–F. Lower–Middle Devonian carbonate strata in areas D–F are faunally and litholog- ically similar to the upper part of the Nixon Fork carbonate platform and are likely depositional or tectonic outliers of that platform. Absolute ages in time scale boundaries and chronostratigraphy are from Walker et al. (2012). Lithic grain abbreviations: Lm—metamorphic; Ls—sedimentary; Lv—volcanic; Qm—monocrystalline quartz; ss—sandstone. Time scale abbreviations: A—Aptian; B/V— Berriasian–Valanginian; C—Cisuralian; Camb.—Cambrian; Cret.—Cretaceous; E—Emsian; Ei—Eifelian; Fa—Famennian; Fr—Frasnian; G—Guadalupian; Gi—Givetian; H/B—Hauterivian–Barremian; L—Lower; Lc—Lochkovian; Lo—Lopingian; Lu—Ludlow; M—Middle; Miss.—Mississippian; Mo—Moscovian; N—Norian; Ord.—Ordovician; P—Pliensbachian; Penn.—Pennsylvanian; Pr—Pragian; S—Sinemurian; Se—Serpukhovian; Sil.—Silurian; T—Tournaisian; U—Upper; V—Visean; W—Wenlock.
Load more

Recommended publications
  • Post-Carboniferous Stratigraphy, Northeastern Alaska by R
    Post-Carboniferous Stratigraphy, Northeastern Alaska By R. L. DETTERMAN, H. N. REISER, W. P. BROSGE,and]. T. DUTRO,JR. GEOLOGICAL SURVEY PROFESSIONAL PAPER 886 Sedirnentary rocks of Permian to Quaternary age are named, described, and correlated with standard stratigraphic sequences UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1975 UNITED STATES DEPARTMENT OF THE INTERIOR ROGERS C. B. MORTON, Secretary GEOLOGICAL SURVEY V. E. McKelvey, Director Library of Congress Cataloging in Publication Data Detterman, Robert L. Post-Carboniferous stratigraphy, northeastern Alaska. (Geological Survey Professional Paper 886) Bibliography: p. 45-46. Supt. of Docs. No.: I 19.16:886 1. Geology-Alaska. I. Detterman, Robert L. II. Series: United States. Geological Survey. Professional Paper 886. QE84.N74P67 551.7'6'09798 74-28084 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-02687-2 CONTENTS Page Page Abstract __ _ _ _ _ __ __ _ _ _ _ _ _ _ _ _ _ _ _ __ __ _ _ _ _ _ _ __ __ _ _ __ __ __ _ _ _ _ __ 1 Stratigraphy__:_Continued Introduction __________ ----------____ ----------------____ __ 1 Kingak Shale ---------------------------------------- 18 Purpose and scope ----------------------~------------- 1 Ignek Formation (abandoned) -------------------------- 20 Geographic setting ------------------------------------ 1 Okpikruak Formation (geographically restricted) ________ 21 Previous work and acknowledgments ------------------ 1 Kongakut Formation ----------------------------------
    [Show full text]
  • CONODONT BIOSTRATIGRAPHY and ... -.: Palaeontologia Polonica
    CONODONT BIOSTRATIGRAPHY AND PALEOECOLOGY OF THE PERTH LIMESTONE MEMBER, STAUNTON FORMATION (PENNSYLVANIAN) OF THE ILLINOIS BASIN, U.S.A. CARl B. REXROAD. lEWIS M. BROWN. JOE DEVERA. and REBECCA J. SUMAN Rexroad , c.. Brown . L.. Devera, 1.. and Suman, R. 1998. Conodont biostrati graph y and paleoec ology of the Perth Limestone Member. Staunt on Form ation (Pennsy lvanian) of the Illinois Basin. U.S.A. Ill: H. Szaniawski (ed .), Proceedings of the Sixth European Conodont Symposium (ECOS VI). - Palaeont ologia Polonica, 58 . 247-259. Th e Perth Limestone Member of the Staunton Formation in the southeastern part of the Illinois Basin co nsists ofargill aceous limestone s that are in a facies relati on ship with shales and sandstones that commonly are ca lcareous and fossiliferous. Th e Perth conodo nts are do minated by Idiognathodus incurvus. Hindeodus minutus and Neognathodu s bothrops eac h comprises slightly less than 10% of the fauna. Th e other spec ies are minor consti­ tuents. The Perth is ass igned to the Neog nathodus bothrops- N. bassleri Sub zon e of the N. bothrops Zo ne. but we were unable to co nfirm its assignment to earliest Desmoin esian as oppose d to latest Atokan. Co nodo nt biofacies associations of the Perth refle ct a shallow near- shore marine environment of generally low to moderate energy. but locali zed areas are more variable. particul ar ly in regard to salinity. K e y w o r d s : Co nodo nta. biozonation. paleoecology. Desmoinesian , Penn sylvanian. Illinois Basin. U.S.A.
    [Show full text]
  • 03-Alekseev and Goreva (Neognathodus).P65
    Lucas, S.G., et al. eds., 2013, The Carboniferous-Permian Transition. New Mexico Museum of Natural History and Science, Bulletin 60. 1 THE CONODONT NEOGNATHODUS BOTHROPS MERRILL, 1972 AS THE MARKER FOR THE LOWER BOUNDARY OF THE MOSCOVIAN STAGE (MIDDLE PENNSYLVANIAN) ALEXANDER S. ALEKSEEV1 AND NATALIA V. GOREVA 2 1 Department of Paleontology, Geological Faculty, Moscow State University, Russia, email: aaleks@geol. msu.ru; 2 Geological institute of Russian Academy of Science, Moscow, Russia, email: [email protected] Abstract—The Moscovian Stage constitutes the Middle Pennsylvanian Series of the Carboniferous System, but a biostratigraphic marker and GSSP for it have not yet been designated. The exact position of the Moscovian boundary cannot be defined properly because in the type area the basal Vereian unconformably overlies the Mississippian limestone or the alluvial and lagoonal Aza Formation of the uppermost Bashkirian. The Task Group to establish a GSSP close to the existing Bashkirian-Moscovian boundary suggested several potential markers among foraminifers and conodonts, but the search for a marker near traditional base of the global Moscovian Stage has stalled. It may be more productive to search for FADs in the lower Moscovian, above the traditional base, to designate the lower boundary of the stage. Relatively rich Vereian and Kashirian conodont assemblages have been recovered from the southwest Moscow Basin, as well as from the Oka-Tsna Swell. The most complete information on the distribution of conodonts in the Vereian- Kashirian boundary interval was obtained from the Yambirno section (Oka-Tsna Swell). The greatest change in conodont assemblages does not occur near the level of the traditional base of the Moscovian, but stratigraphically higher.
    [Show full text]
  • Chapter 2 Paleozoic Stratigraphy of the Grand Canyon
    CHAPTER 2 PALEOZOIC STRATIGRAPHY OF THE GRAND CANYON PAIGE KERCHER INTRODUCTION The Paleozoic Era of the Phanerozoic Eon is defined as the time between 542 and 251 million years before the present (ICS 2010). The Paleozoic Era began with the evolution of most major animal phyla present today, sparked by the novel adaptation of skeletal hard parts. Organisms continued to diversify throughout the Paleozoic into increasingly adaptive and complex life forms, including the first vertebrates, terrestrial plants and animals, forests and seed plants, reptiles, and flying insects. Vast coal swamps covered much of mid- to low-latitude continental environments in the late Paleozoic as the supercontinent Pangaea began to amalgamate. The hardiest taxa survived the multiple global glaciations and mass extinctions that have come to define major time boundaries of this era. Paleozoic North America existed primarily at mid to low latitudes and experienced multiple major orogenies and continental collisions. For much of the Paleozoic, North America’s southwestern margin ran through Nevada and Arizona – California did not yet exist (Appendix B). The flat-lying Paleozoic rocks of the Grand Canyon, though incomplete, form a record of a continental margin repeatedly inundated and vacated by shallow seas (Appendix A). IMPORTANT STRATIGRAPHIC PRINCIPLES AND CONCEPTS • Principle of Original Horizontality – In most cases, depositional processes produce flat-lying sedimentary layers. Notable exceptions include blanketing ash sheets, and cross-stratification developed on sloped surfaces. • Principle of Superposition – In an undisturbed sequence, older strata lie below younger strata; a package of sedimentary layers youngs upward. • Principle of Lateral Continuity – A layer of sediment extends laterally in all directions until it naturally pinches out or abuts the walls of its confining basin.
    [Show full text]
  • Preliminary Geologic Map of the Baird Mountains and Part of the Selawik Quadrangles, Alaska By
    preliminary Geologic Map of the Baird Mountains and part of the Selawik Quadrangles, Alaska by S.M. Karl, J.A. Dumoulin, Inyo Ellersieck, A.G. Harris, and J.M. Schmidt Open-File Report 89-551 This map is preliminary and has not been reviewed for conformity 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. Table Contents ~ntroduction.......................................... 1 Stratigraphic Framework .................................1 Structural Framework ....................................4 Acknowledgments .......................................6 Unit Descriptions ......................................6 Kc ............................................. 6 KJm .............................................6 JPe .............................................7 ~zb................ '. ... ., ,....................... 8 Mzg ............................................10 MzPzi ..........................................10 MZPZ~.......................................... 11 PMC ............................................12 PD1 ............................................12 Mk0 ............................................12 M1 .............................................13 MDue ...........................................14 Mlt ............................................15 Mk .............................................15 MD1 ............................................16 MDe ............................................16 MD~...........................................
    [Show full text]
  • Organic Carbon Isotope Chemostratigraphy of Late Jurassic Early Cretaceous Arctic Canada
    University of Plymouth PEARL https://pearl.plymouth.ac.uk Faculty of Science and Engineering School of Geography, Earth and Environmental Sciences Finding the VOICE: organic carbon isotope chemostratigraphy of Late Jurassic Early Cretaceous Arctic Canada Galloway, JM http://hdl.handle.net/10026.1/15324 10.1017/s0016756819001316 Geological Magazine Cambridge University Press (CUP) All content in PEARL is protected by copyright law. Author manuscripts are made available in accordance with publisher policies. Please cite only the published version using the details provided on the item record or document. In the absence of an open licence (e.g. Creative Commons), permissions for further reuse of content should be sought from the publisher or author. Proof Delivery Form Geological Magazine Date of delivery: Journal and vol/article ref: geo 1900131 Number of pages (not including this page): 15 This proof is sent to you on behalf of Cambridge University Press. Please check the proofs carefully. Make any corrections necessary on a hardcopy and answer queries on each page of the proofs Please return the marked proof within 2 days of receipt to: [email protected] Authors are strongly advised to read these proofs thoroughly because any errors missed may appear in the final published paper. This will be your ONLY chance to correct your proof. Once published, either online or in print, no further changes can be made. To avoid delay from overseas, please send the proof by airmail or courier. If you have no corrections to make, please email [email protected] to save having to return your paper proof. If corrections are light, you can also send them by email, quoting both page and line number.
    [Show full text]
  • Palaeontological Spitsbergen Studies
    POLISH ACADEMY OF SCIENCES INSTITU'TE OF PALEOBIOLOGY PALAEONTOLOGIA POLONICA - NO. 43, 1982 PALAEONTOLOGICAL I SPITSBERGEN STUDIES - Part I (PALEONTOLOGICZNE BL4DANIA SPITSBERGENU - CzeSC I) GERTRUDA BIERNAT- and WANDA SZYMA~~SKA DAWNICTWO NAUKOWE KRZYSZTOF BIRKENMAJER, HALINA PUGACZEWSKA and ANDRZEJ WIERZBOWSKI THE JANUSFJELLET FORMATION (JURASSIC-LOWER CRETACEOUS) AT MYKLEGARDFJELLET, EAST SPITSBERGEN BIRKENMAJER,K; PU~ACZEWSKA,H. and WIERZBOWSKI,A.,: The Janusfjellet Formation (Jurassic-Lower Creiaceous) at Myklegardfjellet, east Spitsbergen. Palaeont. Polonica, 43,107- 140. Fossiliferous marine strata of the Janusfjellet Formation (Jurassic-Lower Cretaceous) are describ- ed from Myklegardfjellet, Agardhbukta area, east Spitsbergen. The invertebrate fauna collected by the first author from these beds in 1977 has been determined by the second author (serpulids, bivalves, belemnites) and by the third author (ammonites). This assemblage allows to distinguish the Upper Callovian, the Kirnrneridgian (Lower and Upper) and the Lower Volgian stages in the lower part of the Janusfjellet Formation (Agardhfjellet Member). The upper part of the Janusfjellet Formation (Rurikfjellet Member) yielded poorly preserved fossils of little stratigraphic value. Key words: Mesozoic, stratigraphy, ammonites, bivalves, belemnites, serpulids, Spitsbergen. K. Birkenmajer, 1nstY~utNauk Geologicznych, Polska Akademia Nauk, 31-002 Krakow, Senacka 3; H. Pugaczewska, Zaklad Paleobiologii, Polska Akadernia Nauk, 02-089 Warszawa,irwirki i Wigury 93; A. Wierzbowski,
    [Show full text]
  • The Geologic Time Scale Is the Eon
    Exploring Geologic Time Poster Illustrated Teacher's Guide #35-1145 Paper #35-1146 Laminated Background Geologic Time Scale Basics The history of the Earth covers a vast expanse of time, so scientists divide it into smaller sections that are associ- ated with particular events that have occurred in the past.The approximate time range of each time span is shown on the poster.The largest time span of the geologic time scale is the eon. It is an indefinitely long period of time that contains at least two eras. Geologic time is divided into two eons.The more ancient eon is called the Precambrian, and the more recent is the Phanerozoic. Each eon is subdivided into smaller spans called eras.The Precambrian eon is divided from most ancient into the Hadean era, Archean era, and Proterozoic era. See Figure 1. Precambrian Eon Proterozoic Era 2500 - 550 million years ago Archaean Era 3800 - 2500 million years ago Hadean Era 4600 - 3800 million years ago Figure 1. Eras of the Precambrian Eon Single-celled and simple multicelled organisms first developed during the Precambrian eon. There are many fos- sils from this time because the sea-dwelling creatures were trapped in sediments and preserved. The Phanerozoic eon is subdivided into three eras – the Paleozoic era, Mesozoic era, and Cenozoic era. An era is often divided into several smaller time spans called periods. For example, the Paleozoic era is divided into the Cambrian, Ordovician, Silurian, Devonian, Carboniferous,and Permian periods. Paleozoic Era Permian Period 300 - 250 million years ago Carboniferous Period 350 - 300 million years ago Devonian Period 400 - 350 million years ago Silurian Period 450 - 400 million years ago Ordovician Period 500 - 450 million years ago Cambrian Period 550 - 500 million years ago Figure 2.
    [Show full text]
  • CONODONTS of the MOJCZA LIMESTONE -.: Palaeontologia Polonica
    CONODONTS OF THE MOJCZA LIMESTONE JERZY DZIK Dzik, J. 1994. Conodonts of the M6jcza Limestone. -In: J. Dzik, E. Olemp ska, and A. Pisera 1994. Ordovician carbonate platform ecosystem of the Holy Cross Moun­ tains. Palaeontologia Polonica 53, 43-128. The Ordovician organodetrital limestones and marls studied in outcrops at M6jcza and Miedzygorz, Holy Cross Mts, Poland, contains a record of the evolution of local conodont faunas from the latest Arenig (Early Kundan, Lenodus variabilis Zone) to the Ashgill (Amorphognathus ordovicicus Zone), with a single larger hiatus corre­ sponding to the subzones from Eop/acognathus pseudop/anu s to E. reclinatu s. The conodont fauna is Baltic in general appearance but cold water genera , like Sagitto­ dontina, Scabbardella, and Hamarodus, as well as those of Welsh or Chinese af­ finities, like Comp/exodus, Phragmodus, and Rhodesognathu s are dominant in par­ ticular parts of the section while others common in the Baltic region, like Periodon , Eop/acognathus, and Sca/pellodus are extremely rare. Most of the lineages continue to occur throughout most of the section enabling quantitative studies on their phyletic evolut ion. Apparatuses of sixty seven species of thirty six genera are described and illustrated. Phyletic evolution of Ba/toniodus, Amorphognathu s, Comp/exodus, and Pygodus is biometrically documented. Element s of apparatu ses are homolog ized and the standard notation system is applied to all of them. Acodontidae fam. n., Drepa­ nodus kie/censis sp. n., and D. santacrucensis sp. n. are proposed . Ke y w o r d s: conodonts, Ordovici an, evolut ion, taxonomy. Jerzy Dzik, Instytut Paleobiologii PAN, A/eja Zwirk i i Wigury 93, 02-089 Warszawa , Poland.
    [Show full text]
  • Pennsylvanian Boundary Unconformity in Marine Carbonate Successions
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Dissertations & Theses in Earth and Atmospheric Earth and Atmospheric Sciences, Department of Sciences Summer 6-2014 ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. Lucien Nana Yobo University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/geoscidiss Part of the Geochemistry Commons, Geology Commons, Sedimentology Commons, and the Stratigraphy Commons Nana Yobo, Lucien, "ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING." (2014). Dissertations & Theses in Earth and Atmospheric Sciences. 59. http://digitalcommons.unl.edu/geoscidiss/59 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Dissertations & Theses in Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. ORIGIN AND DISTRIBUTION OF THE MISSISSIPPIAN – PENNSYLVANIAN BOUNDARY UNCONFORMITY IN MARINE CARBONATE SUCCESSIONS WITH A CASE STUDY OF THE KARST DEVELOPMENT ATOP THE MADISON FORMATION IN THE BIGHORN BASIN, WYOMING. By Luscalors Lucien Nana Yobo A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science Major: Earth and Atmospheric Sciences Under the Supervision of Professor Tracy D.
    [Show full text]
  • Upper Cretaceous Deposits in the Northwest of Saratov Region, Part 2: Problems of Chronostratigraphy and Regional Geological History A
    ISSN 0869-5938, Stratigraphy and Geological Correlation, 2008, Vol. 16, No. 3, pp. 267–294. © Pleiades Publishing, Ltd., 2008. Original Russian Text © A.G. Olfer’ev, V.N. Beniamovski, V.S. Vishnevskaya, A.V. Ivanov, L.F. Kopaevich, M.N. Ovechkina, E.M. Pervushov, V.B. Sel’tser, E.M. Tesakova, V.M. Kharitonov, E.A. Shcherbinina, 2008, published in Stratigrafiya. Geologicheskaya Korrelyatsiya, 2008, Vol. 16, No. 3, pp. 47–74. Upper Cretaceous Deposits in the Northwest of Saratov Region, Part 2: Problems of Chronostratigraphy and Regional Geological History A. G. Olfer’eva, V. N. Beniamovskib, V. S. Vishnevskayab, A. V. Ivanovc, L. F. Kopaevichd, M. N. Ovechkinaa, E. M. Pervushovc, V. B. Sel’tserc, E. M. Tesakovad, V. M. Kharitonovc, and E. A. Shcherbininab a Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow, 117997 Russia b Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 119017 Russia c Saratov State University, Astrakhanskaya ul., 83, Saratov, 410012 Russia d Moscow State University, Vorob’evy Gory, Moscow, 119991 Russia Received November 7, 2006; in final form, March 21, 2007 Abstract—Problems of geochronological correlation are considered for the formations established in the study region with due account for data on the Mezino-Lapshinovka, Lokh and Teplovka sections studied earlier on the northwest of the Saratov region. New paleontological data are used to define more precisely stratigraphic ranges of some stratigraphic subdivisions, to consider correlation between standard and local zones established for different groups of fossils, and to suggest how the Upper Cretaceous regional scale of the East European platform can be improved.
    [Show full text]
  • Devonian and Carboniferous Stratigraphical Correlation and Interpretation in the Central North Sea, Quadrants 25 – 44
    CR/16/032; Final Last modified: 2016/05/29 11:43 Devonian and Carboniferous stratigraphical correlation and interpretation in the Orcadian area, Central North Sea, Quadrants 7 - 22 Energy and Marine Geoscience Programme Commissioned Report CR/16/032 CR/16/032; Final Last modified: 2016/05/29 11:43 CR/16/032; Final Last modified: 2016/05/29 11:43 BRITISH GEOLOGICAL SURVEY ENERGY AND MARINE GEOSCIENCE PROGRAMME COMMERCIAL REPORT CR/16/032 Devonian and Carboniferous stratigraphical correlation and interpretation in the Orcadian area, Central North Sea, Quadrants 7 - 22 K. Whitbread and T. Kearsey The National Grid and other Ordnance Survey data © Crown Copyright and database rights Contributor 2016. Ordnance Survey Licence No. 100021290 EUL. N. Smith Keywords Report; Stratigraphy, Carboniferous, Devonian, Central North Sea. Bibliographical reference WHITBREAD, K AND KEARSEY, T 2016. Devonian and Carboniferous stratigraphical correlation and interpretation in the Orcadian area, Central North Sea, Quadrants 7 - 22. British Geological Survey Commissioned Report, CR/16/032. 74pp. Copyright in materials derived from the British Geological Survey’s work is owned by the Natural Environment Research Council (NERC) and/or the authority that commissioned the work. You may not copy or adapt this publication without first obtaining permission. Contact the BGS Intellectual Property Rights Section, British Geological Survey, Keyworth, e-mail [email protected]. You may quote extracts of a reasonable length without prior permission, provided a full acknowledgement
    [Show full text]