DOCSLIB.ORG

40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

40Ar/39Ar Dating of the Late Cretaceous Jonathan Gaylor To cite this version: Jonathan Gaylor. 40Ar/39Ar Dating of the Late Cretaceous. Earth Sciences. Université Paris Sud - Paris XI, 2013. English. NNT : 2013PA112124. tel-01017165 HAL Id: tel-01017165 https://tel.archives-ouvertes.fr/tel-01017165 Submitted on 2 Jul 2014 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. Université Paris Sud 11 UFR des Sciences d’Orsay École Doctorale 534 MIPEGE, Laboratoire IDES Sciences de la Terre 40Ar/39Ar Dating of the Late Cretaceous Thèse de Doctorat Présentée et soutenue publiquement par Jonathan GAYLOR Le 11 juillet 2013 devant le jury compose de: Directeur de thèse: Xavier Quidelleur, Professeur, Université Paris Sud (France) Rapporteurs: Sarah Sherlock, Senoir Researcher, Open University (Grande-Bretagne) Bruno Galbrun, DR CNRS, Université Pierre et Marie Curie (France) Examinateurs: Klaudia Kuiper, Researcher, Vrije Universiteit Amsterdam (Pays-Bas) Maurice Pagel, Professeur, Université Paris Sud (France) - 2 - - 3 - Acknowledgements I would like to begin by thanking my supervisor Xavier Quidelleur without whom I would not have finished, with special thanks on the endless encouragement and patience, all the way through my PhD! Thank you all at GTSnext, especially to the directors Klaudia Kuiper, Jan Wijbrans and Frits Hilgen for creating such a great project. Working within this team has been a great pleasure and I have enjoyed tremendously the opportunity to work in such a strong network of professionals. A big thank you to Benjamin Heredia, whom I also owe to finishing my PhD. I thoroughly enjoyed every field trip and discussion we had in the middle of no-where in Canada! Also a big thank you all of the work and data you have provided as part of the joint project. Canada would not of been the same without him. I would also like to thank all of the fellow students on the GTSnext project for providing a great insight into the world of academia. I would also like to thank Diederik Liebrand and Tiffany Rivera for all of the banter on the workshops funded by GTSnext. Special thanks to Christian Zeeden and Anne Fischer for helping me in the Netherlands. A big thank you to all others associated with the GTSnext project, especially Willem Langenberg who helped us forge great contacts with Canadian geologists and without whom we would not of been able to complete the work submitted. Additionally I would like to thank, Arts Sweet, Jack Lerbekmo (deceased) and David Eberth for again helping us locate new field sites suitable for this project. I am especially thankful to Silja Husing whom helped me considerably with my paleomagnetic work at Fort Hoofdjjk and providing such an excellent insight to this interesting topic. Thank you to Roel Elsas for developing such a great mineral separation technique, saving me countless hours in the laboratory. - 4 - I would like to send my thanks to Reishi Takashima and Hiroshi Nishi for involving me in their work and allowing me to understand a new insight in the world of geochronology. Thank you to all of the volcanology team in Bât 504 for helping me with work and helping my transition in France from the UK succeed. Especially to Damien for putting up with me in the office and helping me with all my logistical needs. Thank you to all the other PhD students who have provided many interesting times and have became friends. A big thank you to Kim Ho whom I am extremely grateful for helping me settle in at Paris Sud. Thank you to Sarah Sherlock, Bruno Galbrun and Maurice Pagel for their thoughtful insights. Finally, I would like to finishing thanking my family, my Mum and Dad who were always there encouraging and supporting me. Thanks to all my friends in Paris in particular Steffi, Matt and Liesa for helping me have the best three years of my life. I would also like to thank my home friends especially to Thomas, Louise and Dawes, with thanks also to Wiltshire who constantly supported me. The European Community’s Seventh Framework Program (FP7/2007 2013) under Grant agreement no. [215458] has funded this research. - 5 - - 6 - Contents French Summary 9 I. Introduction 24 I.1. Project Aim 25 I.2. Introduction to the Cretaceous 30 I.3. Introduction to Geochronology 43 II. Standards 49 II.1. Introduction 50 II.2. Fluence Monitors 60 II.3. Methodology 70 II.4. Chosen Monitor 75 II.5. Results 78 II.6. Discussion 85 III. Canada 90 III.1. Overview 91 III.2. Western Interior Basin 92 III.3. Introduction to Foreland Basins 94 III.4. Formation of the Western Interior 96 III.5. Sequence Stratigraphy 98 III.6. Previous Work 102 III.7. Geology of Canada 103 III.8. Horseshoe Canyon Formation 113 IV. The Cretaceous/Paleogene Boundary 123 IV.1. Introduction 124 IV.2. Geological Setting 127 IV.3. Samples and Methods 131 IV.4. Discussion 141 IV.5. Conclusion 145 V. The Campanian Maastrichtian Boundary 148 V.1. Introduction 149 V.2. Geological Setting 152 V.3. Samples and Methods 154 V.4. Discussion 163 V.5. Conclusion 171 - 7 - VI. Japan 173 VI.1. Introduction 174 VI.2. Geological Setting 175 VI.3. Previous Work 187 VI.4. Sample Localities 194 VI.5. Analytical Techniques 196 VI.6. Discussion 208 VI.7. Conclusion 212 VII. Conclusions 214 VIII. References 218 Appendices 242 Appendices A (Chapter II) 242 Appendices B (Chapter IV) 245 Appendices C (Chapter V) 261 Appendices D (Chapter VI) 272 - 8 - Résumé Dans le cadre du projet européen GTS Next, nous proposons de calibrer l'échelle des temps du Crétacé Supérieur (66-100 Ma) en utilisant la méthode de datation 40Ar/39Ar sur des minéraux de haute température (sanidine) extraits de cendres volcaniques. L’objectif de cette approche est de contraindre, au cycle d'excentricité de 405 ka le plus proche, les séries sédimentaires européennes de référence du Crétacé aux séries étudiées dans le cadre de ce travail. Cette corrélation pourra être effectuée pour les séries présentant une cyclicité bien définie reliée aux variations des paramètres orbitaux de la Terre. La meilleure approche pour acquérir des âges de très haute résolution et de haute qualité pour le Crétacé Supérieur est d’utiliser les cendres volcaniques riches en silice du bassin du Western Interior (WIB; Amérique du Nord), qui se trouvent intercalées dans les successions sédimentaires marines peu profondes. Ce projet nécessite une approche multi-disciplinaire incluant l’utilisation des techniques de datation par isotopes radiogéniques, associées aux méthodes magnétostratigraphique, chimiostratigraphique et cyclostratigraphique. Le Crétacé, subdivisé en deux époques (Crétacé Supérieur et Crétacé Inférieur), est caractérisé par son climat à effet de serre, par un niveau des mers élevé (150 m plus élevé que les niveaux actuels; Frakes et al, 1999) et par des événements anoxiques globaux. Il se termine brusquement autour de 66 Ma à la limite correspondant à l'extinction massive du Crétacé / Tertiaire (ou plus précisément, Crétacé / Paléogène) incluant la disparition des dinosaures. Durant le Crétacé, le supercontinent Pangée a poursuivi sa dislocation pour former les continents d'aujourd'hui. Ce processus, associé à une hausse du volcanisme sous-marin et du taux d’expansion du plancher océanique au niveau des dorsales, contribue à une augmentation des émissions de CO2 (1700 ppm) conduisant par effet de serre aux températures maximales observées au milieu du Crétacé (Seller, 2005). Le Crétacé, riche en faune marine et terrestre a préservé de nombreux fossiles de vertébrés, mammifères et dinosaures, témoins de cette période, importante et intéressante à étudier pour notre compréhension du système climatique dans un contexte de réchauffement climatique global. Pour cette raison, il est important de contraindre précisément les âges de ces événements et de leurs limites. - 9 - Des enregistrements marins européens, bien contraints par leur contenu en fossiles, ont permis d’élaborer des interprétations cyclostratigraphic précises des derniers 125 Myr. De nombreux travaux, tels que Obradovitch (1993), Gradstein et al. (2004; 2012), ont permis de mettre en place une échelle des temps à haute résolution temporelle. Cependant, certaines parties de l’échelle des temps ne sont pas fixes mais plutôt contraintes par des durées relatives flottantes dues à l’utilisation de séries d’origine géographique différentes dont la corrélation paléontologique est délicate. Cette échelle doit donc être calibrée par des âges absolus pour déterminer avec précision l'histoire géologique, environnementale et climatique globale du Crétacé. En Europe, l’un des principaux problèmes est l’absence de matériel permettant de déterminer l’âge des limites d’étages des principales inversions ou paléomagnétiques. La majorité des coupes stratigraphiques dédiées à l'étude cyclostratigraphique sont principalement situées en Italie, au sud-est de la France et de l'Angleterre. Malheureusement, les couches de tuf volcanique sont trop altérées et les minéraux à basse température (glauconite) montrent des âges radiométriques sous-estimés pour le Crétacé inférieur (Fiet et al., 2006), suggérant un délais important dans la formation des glauconites et donc dans la fermeture du chronomètre K-Ar. La majorité des âges de la plus récente échelles des temps géologiques (GTS2012; Gradstein et al., 2012) a été calculée en utilisant une courbe d'ajustement des âges 40Ar/39Ar d’Obradovitch (1993), recalculés par rapport à des standards re-calibrés (Kuiper et al., 2008).
Recommended publications
  • (2016), Volume 4, Issue 2, 77-90

    (2016), Volume 4, Issue 2, 77-90

    ISSN 2320-5407 International Journal of Advanced Research (2016), Volume 4, Issue 2, 77-90 Journal homepage: http://www.journalijar.com INTERNATIONAL JOURNAL OF ADVANCED RESEARCH RESEARCH ARTICLE LICHENOMETRIC DATING CURVE AS APPLIED TO GLACIER RETREAT STUDIES IN THE HIMALAYAS. Gaurav K. Mishra, Santosh Joshi and Dalip K. Upreti. Lichenology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow- 226001. Manuscript Info Abstract Manuscript History: The study critically favours the importance of lichens in estimating palaeoclimatic events and its use in depicting the future discretion regarding Received: 14 December 2015 Final Accepted: 19 January 2016 glacier retreat. Besides the various lichenometric studies carried out in Indian Published Online: February 2016 Himalayan region, the world-wide classical work of different glaciologist and geologist on different applications of lichenometry is also well focused. Key words: The study also highlights the benefits, restrains, and drawbacks associated Lichens, lichenometry,glacier with the lichenometry. Being a globally accepted biological technique retreat,India. particular emphasis is given on the need of innovative approach in implementation of lichenometry in Indian Himalayan region. *Corresponding Author Gaurav K. Mishra. Copy Right, IJAR, 2016,. All rights reserved. Introduction:- Lichens are slow growing organisms and take several years to get established in nature. Lichens are a unique group of plants, comprising of two micro-organisms, fungus (mycobiont), an organism capable of producing food via photosynthesis and alga (photobiont). These photobionts are predominantly members of the chlorophyta (green algae) or cynophyta (blue-green algae or cynobacteria). The peculiar nature of lichens enables them to colonize variety of substrate like rock, boulders, bark, soil, leaf and man-made buildings.
  • Geologic Map of the Central San Juan Caldera Cluster, Southwestern Colorado by Peter W

    Geologic Map of the Central San Juan Caldera Cluster, Southwestern Colorado by Peter W

    Geologic Map of the Central San Juan Caldera Cluster, Southwestern Colorado By Peter W. Lipman Pamphlet to accompany Geologic Investigations Series I–2799 dacite Ceobolla Creek Tuff Nelson Mountain Tuff, rhyolite Rat Creek Tuff, dacite Cebolla Creek Tuff Rat Creek Tuff, rhyolite Wheeler Geologic Monument (Half Moon Pass quadrangle) provides exceptional exposures of three outflow tuff sheets erupted from the San Luis caldera complex. Lowest sheet is Rat Creek Tuff, which is nonwelded throughout but grades upward from light-tan rhyolite (~74% SiO2) into pale brown dacite (~66% SiO2) that contains sparse dark-brown andesitic scoria. Distinctive hornblende-rich middle Cebolla Creek Tuff contains basal surge beds, overlain by vitrophyre of uniform mafic dacite that becomes less welded upward. Uppermost Nelson Mountain Tuff consists of nonwelded to weakly welded, crystal-poor rhyolite, which grades upward to a densely welded caprock of crystal-rich dacite (~68% SiO2). White arrows show contacts between outflow units. 2006 U.S. Department of the Interior U.S. Geological Survey CONTENTS Geologic setting . 1 Volcanism . 1 Structure . 2 Methods of study . 3 Description of map units . 4 Surficial deposits . 4 Glacial deposits . 4 Postcaldera volcanic rocks . 4 Hinsdale Formation . 4 Los Pinos Formation . 5 Oligocene volcanic rocks . 5 Rocks of the Creede Caldera cycle . 5 Creede Formation . 5 Fisher Dacite . 5 Snowshoe Mountain Tuff . 6 Rocks of the San Luis caldera complex . 7 Rocks of the Nelson Mountain caldera cycle . 7 Rocks of the Cebolla Creek caldera cycle . 9 Rocks of the Rat Creek caldera cycle . 10 Lava flows premonitory(?) to San Luis caldera complex . .11 Rocks of the South River caldera cycle .
  • (2000), Voluminous Lava-Like Precursor to a Major Ash-Flow

    (2000), Voluminous Lava-Like Precursor to a Major Ash-Flow

    Journal of Volcanology and Geothermal Research 98 (2000) 153–171 www.elsevier.nl/locate/jvolgeores Voluminous lava-like precursor to a major ash-flow tuff: low-column pyroclastic eruption of the Pagosa Peak Dacite, San Juan volcanic field, Colorado O. Bachmanna,*, M.A. Dungana, P.W. Lipmanb aSection des Sciences de la Terre de l’Universite´ de Gene`ve, 13, Rue des Maraıˆchers, 1211 Geneva 4, Switzerland bUS Geological Survey, 345 Middlefield Rd, Menlo Park, CA, USA Received 26 May 1999; received in revised form 8 November 1999; accepted 8 November 1999 Abstract The Pagosa Peak Dacite is an unusual pyroclastic deposit that immediately predated eruption of the enormous Fish Canyon Tuff (ϳ5000 km3) from the La Garita caldera at 28 Ma. The Pagosa Peak Dacite is thick (to 1 km), voluminous (Ͼ200 km3), and has a high aspect ratio (1:50) similar to those of silicic lava flows. It contains a high proportion (40–60%) of juvenile clasts (to 3–4 m) emplaced as viscous magma that was less vesiculated than typical pumice. Accidental lithic fragments are absent above the basal 5–10% of the unit. Thick densely welded proximal deposits flowed rheomorphically due to gravitational spreading, despite the very high viscosity of the crystal-rich magma, resulting in a macroscopic appearance similar to flow- layered silicic lava. Although it is a separate depositional unit, the Pagosa Peak Dacite is indistinguishable from the overlying Fish Canyon Tuff in bulk-rock chemistry, phenocryst compositions, and 40Ar/39Ar age. The unusual characteristics of this deposit are interpreted as consequences of eruption by low-column pyroclastic fountaining and lateral transport as dense, poorly inflated pyroclastic flows.
  • A Review of Lichenometric Dating of Glacial Moraines in Alaska a Review of Lichenometric Dating of Glacial Moraines in Alaska

    A Review of Lichenometric Dating of Glacial Moraines in Alaska a Review of Lichenometric Dating of Glacial Moraines in Alaska

    A REVIEW OF LICHENOMETRIC DATING OF GLACIAL MORAINES IN ALASKA A REVIEW OF LICHENOMETRIC DATING OF GLACIAL MORAINES IN ALASKA BY GREGORY C. WILES1, DAVID J. BARCLAY2 AND NICOLÁS E.YOUNG3 1Department of Geology, The College of Wooster, Wooster, USA 2Geology Department, State University of New York at Cortland, Cortland, USA 3Department of Geology, University at Buffalo, Buffalo, NY, USA Wiles, G.C., Barclay, D.J. and Young, N.E., 2010: A review of li- scarred trees provide high precision records span- chenometric dating of glacial moraines in Alaska. Geogr. Ann., 92 ning the past 2000 years (Barclay et al. 2009). A (1): 101–109. However, many other glacier forefields in Alaska ABSTRACT. In Alaska, lichenometry continues to be are beyond the latitudinal or altitudinal tree line in an important technique for dating late Holocene locations where tree-ring based dating methods moraines. Research completed during the 1970s cannot be applied. through the early 1990s developed lichen dating Lichenometry is a key method for dating curves for five regions in the Arctic and subarctic Alaskan Holocene glacier histories beyond the tree mountain ranges beyond altitudinal and latitudinal treelines. Although these dating curves are still in line. Some of the earliest well-replicated glacier use across Alaska, little progress has been made in histories in Alaska were based on lichen dates of the past decade in updating or extending them or in moraines (Denton and Karlén 1973a, b, 1977; developing new curves. Comparison of results from Calkin and Ellis 1980, 1984; Ellis and Calkin 1984) recent moraine-dating studies based on these five and the method continues to be applied today (e.g.
  • Stratigraphic Implications of a New Lower Cretaceous Ammonoid Fauna from the Puez Area (Valanginian – Aptian, Dolomites, Southern Alps, Italy)

    Stratigraphic Implications of a New Lower Cretaceous Ammonoid Fauna from the Puez Area (Valanginian – Aptian, Dolomites, Southern Alps, Italy)

    Geo.Alp, Vol. 3, S. 55–83, 2006 STRATIGRAPHIC IMPLICATIONS OF A NEW LOWER CRETACEOUS AMMONOID FAUNA FROM THE PUEZ AREA (VALANGINIAN – APTIAN, DOLOMITES, SOUTHERN ALPS, ITALY) Alexander Lukeneder1 & Christian Aspmair2 With 6 figures and 8 plates 1 Natural History Museum, Geological-Palaeontological Department, Burgring 7, A-1010 Wien, Austria, e-mail: [email protected] 2 Prissian 102, I – 39010 Tisens (BZ), Italy Abstract Lower Cretaceous ammonoids (n = 424) were collected at the Puez locality in the Dolomites of Southern Tyrol. The cephalopod fauna from the marly limestones to marls here indicates Late Valanginian to Early Aptian age. The deposition of the marly limestones and marls of this interval occurred during depositional- ly unstable conditions. The underlying Biancone Formation (Maiolica Formation) is of Early Valanginian, whereas the lowermost Rosso Ammonitico is of Jurassic to Berriasian age. The ammonoid fauna consists of 27 different genera, each represented by 1-2 species. The assemblage at the Puez section is dominated by the Phylloceratina (30%) and the Ammonitina (34%). Phyllopachyceras (17%) and Phylloceras (13%) (both Phylloceratina) are the most frequent components, followed by Lytoceras (12%) (Lytoceratina), and Barremites (10%) and Melchiorites (8%) (both Ammonitina). The cephalopod fauna is purely of Mediterranean origin. Zusammenfassung Unterkreide Ammonoideen (424 Exemplare) der Puez Lokalität in den Dolomiten Süd-Tirols wurden unter- sucht. Die Fauna der mergeligen Kalke und Mergel von Puez zeigen ein Alter von Ober-Valanginium bis Unter-Aptium an. Die mergeligen Kalke und Mergel dieses Abschnitts lagerten sich unter instabiler Bedingungen ab. Die unterlagernde Biancone Formation (Maiolica Formation) zeigt Unter-Valanginium an, wogegen die tiefste Formation des Rosso Ammonitico auf Ober-Jura bis Berriasium hindeutet.
  • Reconstructing Quaternary Environments

    Reconstructing Quaternary Environments

    Reconstructing Quaternary Environments Third Edition John Lowe arid Mike Walker 13 Routledge jjj % Taylor & Francis Croup LONDON AND NEW YORK Contents List offigures and tables xv Preface to the third edition xxvn Acknowledgements xxix Cover image details xxx 1 The Quaternary record 1 1 1 Introduction 1 1 2 Interpreting the Quaternary record 2 1 3 The status of the Quaternary in the geological timescale 2 1 4 The duration of the Quaternary 3 1 5 The development of Quaternary studies 5 151 Historical developments 5 152 Recent developments 7 1 6 The framework of the Quaternary 9 17 The causes of climatic change 13 1 8 The scope of this book 16 Notes 17 2 Geomorphological evidence 19 2 1 Introduction 19 2 2 Methods 19 22 1 Field methods 19 22 11 Field mapping 19 2 2 12 Instrumental levelling 20 222 Remote sensing 22 2 2 2 1 Aerial photography 22 2 2 2 2 Satellite imagery 22 2 2 2 3 Radar 23 2 2 2 4 Sonar and seismic sensing 24 2 2 2 5 Digital elevation/terrain modelling 24 2 3 Glacial landforms 26 23 1 Extent of ice cover 27 2 3 2 Geomorphological evidence and the extent of ice sheets and glaciers during the last cold stage 30 2 3 2 1 Northern Europe 30 2 3 2 2 Britain and Ireland 33 vi CONTENTS 2 3 2 3 North America 35 2 3 3 Direction of ice movement 39 2 3 3 1 Striations 40 2 3 3 2 Friction cracks 40 2 3 3 3 Ice moulded (streamlined) bedrock 40 2 3 3 4 Streamlined glacial deposits 42 2 34 Reconstruction offormer tee masses 43 2 3 4 1 Ice sheet modelling 43 2 3 4 2 Ice caps and glaciers 47 23 5 Palaeochmatic inferences using former glacier
  • Abelisaurus Comahuensis 321 Acanthodiscus Sp. 60, 64

    Abelisaurus Comahuensis 321 Acanthodiscus Sp. 60, 64

    Index Page numbers in italic denote figure. Page numbers in bold denote tables. Abelisaurus comahuensis 321 structure 45-50 Acanthodiscus sp. 60, 64 Andean Fold and Thrust Belt 37-53 Acantholissonia gerthi 61 tectonic evolution 50-53 aeolian facies tectonic framework 39 Huitrin Formation 145, 151-152, 157 Andes, Neuqu6n 2, 3, 5, 6 Troncoso Member 163-164, 167, 168 morphostructural units 38 aeolian systems, flooded 168, 169, 170, 172, stratigraphy 40 174-182 tectonic evolution, 15-32, 37-39, 51 Aeolosaurus 318 interaction with Neuqu6n Basin 29-30 Aetostreon 200, 305 Andes, topography 37 Afropollis 76 Andesaurus delgadoi 318, 320 Agrio Fold and Thrust Belt 3, 16, 18, 29, 30 andesite 21, 23, 26, 42, 44 development 41 anoxia see dysoxia-anoxia stratigraphy 39-40, 40, 42 Aphrodina 199 structure 39, 42-44, 47 Aphrodina quintucoensis 302 uplift Late Cretaceous 43-44 Aptea notialis 75 Agrio Formation Araucariacites australis 74, 75, 76 ammonite biostratigraphy 58, 61, 63, 65, 66, Araucarioxylon 95,273-276 67 arc morphostructural units 38 bedding cycles 232, 234-247 Arenicolites 193, 196 calcareous nannofossil biostratigraphy 68, 71, Argentiniceras noduliferum 62 72 biozone 58, 61 highstand systems tract 154 Asteriacites 90, 91,270 lithofacies 295,296, 297, 298-302 Asterosoma 86 92 marine facies 142-143, 144, 153 Auca Mahuida volcano 25, 30 organic facies 251-263 Aucasaurus garridoi 321 palaeoecology 310, 311,312 Auquilco evaporites 42 palaeoenvironment 309- 310, 311, Avil6 Member 141,253, 298 312-313 ammonites 66 palynomorph biostratigraphy 74,
  • Guidebook for the Post-Congress Fieldtrip in the Vocontian Basin, SE France (September 11-13, 2008)

    Guidebook for the Post-Congress Fieldtrip in the Vocontian Basin, SE France (September 11-13, 2008)

    12th Meeting of the International Nannoplankton Association (Lyon, September 7-10, 2008) Guidebook for the post-congress fieldtrip in the Vocontian Basin, SE France (September 11-13, 2008) Emanuela MATTIOLI (special editor), Silvia GARDIN, Fabienne GIRAUD, Davide OLIVERO, Bernard PITTET & Stéphane REBOULET ISBN 978-2-916733-02-9 Dépôt légal à parution Manuscrit en ligne depuis le 7 Septembre 2008 Manuscript online since September 7, 2008 Carnets de Géologie / Notebooks on Geology - Book 2008/01 (CG2008_BOOK_01) Guidebook for the post-congress fieldtrip in the Vocontian Basin, SE France (September 11-13, 2008) Emanuela MATTIOLI (special editor) 1,2, Silvia GARDIN 3, Fabienne GIRAUD 1, Davide OLIVERO 1, Bernard PITTET 1 & Stéphane REBOULET 1 1 UMR 5125 PEPS (CNRS), Université Lyon 1, Campus de la DOUA, Bâtiment Géode, 69622 Villeurbanne Cedex (France) 2 [email protected] 3 UMR 5143 (CNRS), Université Pierre et Marie Curie, Paris 6, 75013 Paris (France) Manuscript online since September 7, 2008 1 Carnets de Géologie / Notebooks on Geology - Book 2008/01 (CG2008_BOOK_01) Chapter 1. The Aalenian-Bajocian northward, with many hiatuses (JAUTÉE, 1984). (Middle Jurassic) of the Digne Basinal facies, represented by marl-limestone alternations, are recorded in the southernmost area areas but in the sector south of the Verdon Davide OLIVERO with the contribution of River a shallow-water platform developed, Emanuela MATTIOLI documented by the occurrence of bioclastic limestones with corals. This development is Geographical and geological context evidence of a progressive extension to the Provence platform southward. The Digne area is located in southeastern France (Fig. 1.1), in the department of "Alpes In the Middle Jurassic, the central part of the de Haute-Provence".
  • Bicentennial Review

    Bicentennial Review

    Journal of the Geological Society, London, Vol. 164, 2007, pp. 1073–1092. Printed in Great Britain. Bicentennial Review Quaternary science 2007: a 50-year retrospective MIKE WALKER1 & JOHN LOWE2 1Department of Archaeology & Anthropology, University of Wales, Lampeter SA48 7ED, UK 2Department of Geography, Royal Holloway, University of London, Egham TW20 0EX, UK Abstract: This paper reviews 50 years of progress in understanding the recent history of the Earth as contained within the stratigraphical record of the Quaternary. It describes some of the major technological and methodological advances that have occurred in Quaternary geochronology; examines the impressive range of palaeoenvironmental evidence that has been assembled from terrestrial, marine and cryospheric archives; assesses the progress that has been made towards an understanding of Quaternary climatic variability; discusses the development of numerical modelling as a basis for explaining and predicting climatic and environmental change; and outlines the present status of the Quaternary in relation to the geological time scale. The review concludes with a consideration of the global Quaternary community and the challenge for the future. In 1957 one of the most influential figures in twentieth century available ‘laboratory’ for researching Earth-system processes. Quaternary science, Richard Foster Flint, published his seminal Moreover, although unlocking the Quaternary geological record text Glacial and Pleistocene Geology. In the Preface to this rests firmly on the use of modern analogues, the uniformitarian work, he made reference to the great changes in ‘our under- approach can be inverted so that ‘the past can provide the key to standing of Pleistocene events that had occurred over the the future’.
  • The Timing, Dynamics and Palaeoclimatic Significance of Ice Sheet Deglaciation in Central Patagonia, Southern South America

    The Timing, Dynamics and Palaeoclimatic Significance of Ice Sheet Deglaciation in Central Patagonia, Southern South America

    The timing, dynamics and palaeoclimatic significance of ice sheet deglaciation in central Patagonia, southern South America Jacob Martin Bendle Department of Geography Royal Holloway, University of London Thesis submitted for the degree of Doctor of Philosophy (PhD), Royal Holloway, University of London September, 2017 1 Declaration I, Jacob Martin Bendle, hereby declare that this thesis and the work presented in it are entirely my own unless otherwise stated. Chapters 3-7 of this thesis form a series of research papers, which are either published, accepted or prepared for publication. I am responsible for all data collection, analysis, and primary authorship of Chapters 3, 5, 6 and 7. For Chapter 4, I contributed datasets, and co-authored the paper, which was led by Thorndycraft. Detailed statements of contribution are given in Chapter 1 of this thesis, for each research paper. I wrote the introductory (Chapters 1 and 2), synthesis (Chapter 8) and concluding (Chapter 9) chapters of the thesis. Signed: ..................................................................................... Date:.............................. (Candidate) Signed: ..................................................................................... Date:.............................. (Supervisor) 2 Acknowledgements First and foremost, I am very grateful to my supervisors Varyl Thorndycraft, Adrian Palmer, and Ian Matthews, whose tireless support, guidance and, most of all, enthusiasm, have made this project great fun. Through their company in the field they have contributed greatly to this thesis, and provided much needed humour along the way. For always giving me the freedom to explore, but wisely guiding me when required, I am very thankful. I am indebted to my brother, Aaron Bendle, who helped me for five weeks as a field assistant in Patagonia, and who tirelessly, and without complaint, dug hundreds of sections – thank you for your hard work and great company.
  • Upper Cretaceous Stratigraphy and Biostratigraphy of South-Central New Mexico Stephen C

    Upper Cretaceous Stratigraphy and Biostratigraphy of South-Central New Mexico Stephen C

    New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/63 Upper Cretaceous stratigraphy and biostratigraphy of south-central New Mexico Stephen C. Hook, Greg H. Mack, and William A. Cobban, 2012, pp. 413-430 in: Geology of the Warm Springs Region, Lucas, Spencer G.; McLemore, Virginia T.; Lueth, Virgil W.; Spielmann, Justin A.; Krainer, Karl, New Mexico Geological Society 63rd Annual Fall Field Conference Guidebook, 580 p. This is one of many related papers that were included in the 2012 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks.
  • Dorset GA Group Newsletter Summer 2020

    Dorset GA Group Newsletter Summer 2020

    Dorset GA Group Newsletter Summer 2020 https://dorsetgeologistsassociation.org/ Contents Welcome to the Summer Newsletter! Page 1: Editor’s notes and the It is now two years since I assumed the role of ‘interim’ formation of calcareous concretions Newsletter Editor. Who knew interim could last so long? It’s Page 2: The formation of calcareous been interesting and I’ve learned a lot, not just about the concretions production process but also the geology! As usual, a big thank Pages 3-4: Geology of Shaftesbury you to everyone who has contributed to the content, it is very and a Quiz much appreciated. If anyone has new ideas for content do Pages 4-6 Tarrant Rushton Church please let me know - feedback is very welcome. Pages 6-9: Fontainebleau and the DGAG activities are still in abeyance until some sort of normality Paris Basin returns. We will keep you posted. At least it provides some time Pages 10-13: The Hot Rock Slot for reflection. Perhaps there’s a topic you’d like to know more Page 14: Geology of Normandy about, a new workshop activity or a place we could visit or Page 15: Geology of Lithium re-visit to learn about the Geology. The Committee is always Page 16 : Book review/quiz answers open to suggestions. Kelvin Page 18: For your diary The formation of calcareous concretions On a recent trip to South Island New Zealand the Moeraki Boulders were on the list of places to visit. Unfortunately, the weather was poor when we were there, but the boulders were still very impressive (picture 1).