Etching Conditions for the Revelation of Fission Tracks
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Field Geology and Petrologic Investigation of the Strawberry Volcanics, Northeast Oregon
Portland State University PDXScholar Dissertations and Theses Dissertations and Theses Winter 2-24-2016 Field Geology and Petrologic Investigation of the Strawberry Volcanics, Northeast Oregon Arron Richard Steiner Portland State University Follow this and additional works at: https://pdxscholar.library.pdx.edu/open_access_etds Part of the Geology Commons, and the Volcanology Commons Let us know how access to this document benefits ou.y Recommended Citation Steiner, Arron Richard, "Field Geology and Petrologic Investigation of the Strawberry Volcanics, Northeast Oregon" (2016). Dissertations and Theses. Paper 2712. https://doi.org/10.15760/etd.2708 This Dissertation is brought to you for free and open access. It has been accepted for inclusion in Dissertations and Theses by an authorized administrator of PDXScholar. Please contact us if we can make this document more accessible: [email protected]. Field Geology and Petrologic Investigation of the Strawberry Volcanics, Northeast Oregon by Arron Richard Steiner A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Environmental Sciences and Resources: Geology Dissertation Committee: Martin J. Streck, Chair Michael L. Cummings Jonathan Fink John A.Wolff Dirk Iwata-Reuyl Portland State University 2016 © 2015 Arron Richard Steiner i ABSTRACT The Strawberry Volcanics of Northeast Oregon are a group of geochemically related lavas with a diverse chemical range (basalt to rhyolite) that erupted between 16.2 and 12.5 Ma and co-erupted with the large, (~200,000 km3) Middle Miocene tholeiitic lavas of the Columbia River Basalt Group (CRBG), which erupted near and geographically surround the Strawberry Volcanics. The rhyolitic lavas of the Strawberry Volcanics produced the oldest 40Ar/39Ar ages measured in this study with ages ranging from 16.2 Ma to 14.6 Ma, and have an estimated total erupted volume of 100 km3. -
Cross-References ASTEROID IMPACT Definition and Introduction History of Impact Cratering Studies
18 ASTEROID IMPACT Tedesco, E. F., Noah, P. V., Noah, M., and Price, S. D., 2002. The identification and confirmation of impact structures on supplemental IRAS minor planet survey. The Astronomical Earth were developed: (a) crater morphology, (b) geo- 123 – Journal, , 1056 1085. physical anomalies, (c) evidence for shock metamor- Tholen, D. J., and Barucci, M. A., 1989. Asteroid taxonomy. In Binzel, R. P., Gehrels, T., and Matthews, M. S. (eds.), phism, and (d) the presence of meteorites or geochemical Asteroids II. Tucson: University of Arizona Press, pp. 298–315. evidence for traces of the meteoritic projectile – of which Yeomans, D., and Baalke, R., 2009. Near Earth Object Program. only (c) and (d) can provide confirming evidence. Remote Available from World Wide Web: http://neo.jpl.nasa.gov/ sensing, including morphological observations, as well programs. as geophysical studies, cannot provide confirming evi- dence – which requires the study of actual rock samples. Cross-references Impacts influenced the geological and biological evolu- tion of our own planet; the best known example is the link Albedo between the 200-km-diameter Chicxulub impact structure Asteroid Impact Asteroid Impact Mitigation in Mexico and the Cretaceous-Tertiary boundary. Under- Asteroid Impact Prediction standing impact structures, their formation processes, Torino Scale and their consequences should be of interest not only to Earth and planetary scientists, but also to society in general. ASTEROID IMPACT History of impact cratering studies In the geological sciences, it has only recently been recog- Christian Koeberl nized how important the process of impact cratering is on Natural History Museum, Vienna, Austria a planetary scale. -
Comet and Meteorite Traditions of Aboriginal Australians
Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, 2014. Edited by Helaine Selin. Springer Netherlands, preprint. Comet and Meteorite Traditions of Aboriginal Australians Duane W. Hamacher Nura Gili Centre for Indigenous Programs, University of New South Wales, Sydney, NSW, 2052, Australia Email: [email protected] Of the hundreds of distinct Aboriginal cultures of Australia, many have oral traditions rich in descriptions and explanations of comets, meteors, meteorites, airbursts, impact events, and impact craters. These views generally attribute these phenomena to spirits, death, and bad omens. There are also many traditions that describe the formation of meteorite craters as well as impact events that are not known to Western science. Comets Bright comets appear in the sky roughly once every five years. These celestial visitors were commonly seen as harbingers of death and disease by Aboriginal cultures of Australia. In an ordered and predictable cosmos, rare transient events were typically viewed negatively – a view shared by most cultures of the world (Hamacher & Norris, 2011). In some cases, the appearance of a comet would coincide with a battle, a disease outbreak, or a drought. The comet was then seen as the cause and attributed to the deeds of evil spirits. The Tanganekald people of South Australia (SA) believed comets were omens of sickness and death and were met with great fear. The Gunditjmara people of western Victoria (VIC) similarly believed the comet to be an omen that many people would die. In communities near Townsville, Queensland (QLD), comets represented the spirits of the dead returning home. -
Exceptionally Well-Preserved Fossils in a Middle Ordovician Impact Crater
Downloaded from http://jgs.lyellcollection.org/ by guest on September 29, 2021 Review focus Journal of the Geological Society Published Online First https://doi.org/10.1144/jgs2018-101 The Winneshiek biota: exceptionally well-preserved fossils in a Middle Ordovician impact crater Derek E.G. Briggs1,2*, Huaibao P. Liu3, Robert M. McKay3 & Brian J. Witzke4 1 Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA 2 Yale Peabody Museum of Natural History, Yale University, New Haven, CT 06520, USA 3 Iowa Geological Survey, IIHR – Hydroscience & Engineering, University of Iowa, 340 Trowbridge Hall, Iowa City, IA 52242, USA 4 Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, IA 52242, USA D.E.G.B., 0000-0003-0649-6417 * Correspondence: [email protected] Abstract: The Winneshiek Shale (Middle Ordovician, Darriwilian) was deposited in a meteorite crater, the Decorah impact structure, in NE Iowa. This crater is 5.6 km in diameter and penetrates Cambrian and Ordovician cratonic strata. It was probably situated close to land in an embayment connected to the epicontinental sea; typical shelly marine taxa are absent. The Konservat-Lagerstätte within the Winneshiek Shale is important because it represents an interval when exceptional preservation is rare. The biota includes the earliest eurypterid, a giant form, as well as a new basal chelicerate and the earliest ceratiocarid phyllocarid. Conodonts, some of giant size, occur as bedding plane assemblages. Bromalites and rarer elements, including a linguloid brachiopod and a probable jawless fish, are also present. Similar fossils occur in the coeval Ames impact structure in Oklahoma, demonstrating that meteorite craters represent a novel and under-recognized setting for Konservat- Lagerstätten. -
Magyar Királyi Földtani Intézet (2006.)
' Copyright Magyar `llami Fldtani IntØzet (Geological Institute of Hungary), 2005 Minden jog fenntartva! All rights reserved! Lektorok Reviewers: BALLA ZOLTÁN, CSÁSZÁRGZA, HAAS JÁNOS, HORVÁTH ISTVÁN, JÁMBOR Á RON, KOVÁCS SÁNDOR, KUBOVICS IMRE, LESS GYRGY, LIEBE PÁL,VICZIÁN ISTVÁN Sorozatszerkesztı Serial editor: BALLA ZOLTÁN Szakszerkesztı Scientific editor: PIROS OLGA Mßszaki szerkesztı Technical editor: SIMONYI DEZS SzÆmtgØpes nyomdai elıkØsztØs DTP: PIROS OLGA, SIMONYI DEZS Bortterv Cover design: SIMONYI DEZS Kiadja a Magyar `llami Fldtani IntØzet Published by the Geological Institute of Hungary Felelıs kiad Responsible editor: KORDOS L`SZL Igazgat Director HU ISSN 03689751 3 Tartalom — Contents Működési jelentés — Activity Report HÁMOR GÉZA (1934–2007) . 7 JÁMBOR ÁRON (összeállító): Dr. Hámor Géza szakirodalmi munkássága . 8 KORDOS LÁSZLÓ: A múlt a jövő kulcsa . 17 BREZSNYÁNSZKY KÁROLY: Igazgatói beszámoló a Magyar Állami Földtani Intézet 2006. évi tevékenységéről . 19 Szakcikkek — Scientific publications RIPSZNÉ JUDIK KATALIN: A Medvednica hegység (Horvátország) és Észak-Magyarország paleozoos és mezozoos kishőmérsékletű metamorf képződményeinek összevetése. — Comparison of Palaeozoic and Mesozoic very low- grade metamorphic formations in the Medvednica Mts (Croatia) and in North Hungary. 47 PELIKÁN PÁL, IVAN FILIPOVIĆ, DIVNA JOVANOVIĆ, MILAN SUDAR, †LJUBINKO PROTIĆ, HIPS KINGA, KOVÁCS SÁNDOR, LESS GYÖRGY: A Bükki-terrénum (É-Magyarország), a Jadari-terrénum (ÉNy-Szerbia) és a Sana-Unai-terrénum (ÉNy-Bosznia) karbon, perm és triász rétegsorainak összehasonlítása. — Correlation of the Carboniferous, Permian and Triassic sequences of the Bükk, Jadar, Sana-Una terrains. 59 BUDAI TAMÁS: Platformok és medencék kialakulása és fejlődése a Bakony középső-triász története során. — Middle Triassic platform and basin evolution of the Bakony Mts, Hungary. 77 HAAS JÁNOS: A bükki és a darnói jura képződmények ősföldrajzi helyzete és kapcsolatai. -
Insights Into the Thermal History of North-Eastern Switzerland—Apatite
geosciences Article Insights into the Thermal History of North-Eastern Switzerland—Apatite Fission Track Dating of Deep Drill Core Samples from the Swiss Jura Mountains and the Swiss Molasse Basin Diego Villagómez Díaz 1,2,* , Silvia Omodeo-Salé 1 , Alexey Ulyanov 3 and Andrea Moscariello 1 1 Department of Earth Sciences, University of Geneva, 13 rue des Maraîchers, 1205 Geneva, Switzerland; [email protected] (S.O.-S.); [email protected] (A.M.) 2 Tectonic Analysis Ltd., Chestnut House, Duncton, West Sussex GU28 0LH, UK 3 Institut des sciences de la Terre, University of Lausanne, Géopolis, 1015 Lausanne, Switzerland; [email protected] * Correspondence: [email protected] Abstract: This work presents new apatite fission track LA–ICP–MS (Laser Ablation Inductively Cou- pled Plasma Mass Spectrometry) data from Mid–Late Paleozoic rocks, which form the substratum of the Swiss Jura mountains (the Tabular Jura and the Jura fold-and-thrust belt) and the northern margin of the Swiss Molasse Basin. Samples were collected from cores of deep boreholes drilled in North Switzerland in the 1980s, which reached the crystalline basement. Our thermochronological data show that the region experienced a multi-cycle history of heating and cooling that we ascribe to burial and exhumation, respectively. Sedimentation in the Swiss Jura Mountains occurred continuously from Early Triassic to Early Cretaceous, leading to the deposition of maximum 2 km of sediments. Subsequently, less than 1 km of Lower Cretaceous and Upper Jurassic sediments were slowly eroded during the Late Cretaceous, plausibly as a consequence of the northward migration of the forebulge Citation: Villagómez Díaz, D.; Omodeo-Salé, S.; Ulyanov, A.; of the neo-forming North Alpine Foreland Basin. -
795-Rib NASA TECHNICAL MEMORANDUM NASA TM-88477
795-Rib NASA TECHNICAL MEMORANDUM NASA TM-88477 B.A. Ivanov Translation of: "Mekhanika krateroobrazovaniya," IN: Itogi nauki i teckhniki, Seriya: Mekhanika deformi- ruyemogo tverdogo tela, Vol. 14, 1981, Moscow, pp. 60-128 (UDC 624.131:551.215.6) NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON, D.C. 20546 AUGUST 1986 (NASA-TM-08417) CHATERING HECHANICS (Naticnal Aercnautics and SFace N 8 7- 1 55 62 Bduinistration) 55 p CSCL O8G Unclas 53/46 40340 I Translation of: "Mekhanika krateroobrazovaniya," IN: Itogi nauki i Tekhniki, Seriya: Mekhanika deformiruyemogo tverdogo tela, Vol. 14, 1981, Moscow, pp. 60-128 (UDC 624.131:551.215.6 t Main concepts and theoretical models which are used for studying the mechanics of cratering are discussed. Numerical two-dimensional calculations are made of explosions near a surface and high- speed impact. Models are given for the motion of a medium during cratering. Gata from laboratory modeling are given. The effect of gravitational force and scales of cratering phenomena is analyzed. MECHANICS OF DEFORMABLE SOLID BODY UDC 624.131:551.215.6 CRATERING 'MECHANICS By B. A. Ivanov Introduction /E* One can define mechanics of craterins as a discipline , studying the formation of an indentation (crater or funnel) on the surface of a solid deformable body as a result of high-speed collision or explosion near the surface with regard for the resulting shock waves, high-speed plastic deformation of the destroyed materials, scattering of the ejecta and other concomitant phenomena. The mechanics of cratering thus applied is an applied dis- cipline using results of the physics of shock waves and high pressures, mechanics of a solid deformable bodyr hydro gas dynamicsr etc. -
Basic Guide to Bottle Identification Say You're Planting a New Tree in Your
Basic Guide to Bottle Age Identification Say you’re planting a new tree in your backyard, and you dig a hole deeper than you’ve had to dig before. In the hole you find a glass bottle that you didn’t put there. How can you identify the bottle? How can you tell if it is old or just a piece of modern recycling that the previous owner left behind? Below please find a basic guide to help you identify a bottle’s age. Bottle identification is a rabbit hole that I’ve found fun to fall into; one bottle can take hours to research, and sometimes, you can’t find anything on it at all! In addition, manufacturing technological advances were adopted over time, not all at once, so older techniques were used at the same time as newer ones. This makes determining exact age for a bottle that wasn’t machine-made a little tricky. But, by looking at a few basic characteristics, you can learn if you want to toss your find in the recycling bin or place it at the center of your mantle. If you are interested in discovering more, I’ve listed some helpful web sites at the end. If you just want a basic guide, hope this helps! How was the bottle made? The first thing that I do when I handle a bottle is look at the construction – the sides, the top or lip, and the base. Free-Blown - Bottles were blown by hand in antiquity, and free-blown bottles were the main manufacturing technique used before the mid-1800s for utilitarian bottles. -
Trackflow, a New Versatile Microscope System for Fission Track
https://doi.org/10.5194/gchron-2019-13 Preprint. Discussion started: 23 October 2019 c Author(s) 2019. CC BY 4.0 License. Technical note: TRACKFlow, a new versatile microscope system for fission track analysis Gerben Van Ranst1, Philippe Baert2, Ana Clara Fernandes2, Johan De Grave1 1Department of Geology, Ghent University, Ghent, 9000, Belgium 5 2Nikon Belux, Groot-Bijgaarden, 1702, Belgium Correspondence to: Gerben Van Ranst ([email protected]) Abstract. We here present TRACKFlow, a new system with dedicated modules for the fission track (FT) laboratory. It is based on the motorised Nikon Eclipse Ni-E upright microscope with the Nikon DS-Ri2 full frame camera and is embedded within the Nikon 10 NIS-Elements Advanced Research software package. TRACKFlow decouples image acquisition from analysis to decrease schedule stress of the microscope. The system further has the aim of being versatile, adaptable to multiple preparation protocols and analysis approaches. It is both suited for small-scale laboratories and is also ready for upscaling to high-throughput imaging. The versatility of the system, based on the operators’ full access to the NIS-Elements package, exceeds that of other systems for FT and further expands to stepping away from the dedicated FT microscope towards a general microscope for 15 Earth Sciences, including dedicated modules for FT research. TRACKFlow consists of a number of user-friendly protocols which are based on the well plate design that allows sequential scanning of multiple samples without the need of replacing the slide on the stage. All protocols include a sub-protocol to scan a map of the mount for easy navigation through the samples on the stage. -
Downstream Changes of Alpine Zircon Fission-Track Ages in the Rhône and Rhine Rivers
Downstream changes of Alpine zircon fission-track ages in the Rhône and Rhine rivers. Matthias Bernet, Mark T. Brandon, John I. Garver, Brandi Molitor To cite this version: Matthias Bernet, Mark T. Brandon, John I. Garver, Brandi Molitor. Downstream changes of Alpine zircon fission-track ages in the Rhône and Rhine rivers.. Journal of Sedimentary Research, Society for Sedimentary Geology, 2004, 74, pp.82-94. hal-00097147 HAL Id: hal-00097147 https://hal.archives-ouvertes.fr/hal-00097147 Submitted on 21 Sep 2006 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. Alpine zircon fission-track ages in the Rhône and Rhine rivers DOWNSTREAM CHANGES OF ALPINE ZIRCON FISSION-TRACK AGES IN THE RHÔNE AND RHINE RIVERS MATTHIAS BERNET1, 2, MARK T. BRANDON1, JOHN I. GARVER3, AND BRANDI MOLITOR3,4 1Department of Geology and Geophysics, Yale University, New Haven, Connecticut 06520- 8109, U.S.A. 2present address: Laboratoire de Géodynamique des Chaînes Alpines, Université Joseph Fourier, 38041Grenoble Cedex 9, France email: [email protected] 3Geology Department, Union College, Schenectady, New York 12308-2311, U.S.A. 4present address: Western Washington University, Bellingham, Washington, 98225, U.S.A. -
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Convergent Margin Magmatism in the Central Andes and Its Near Antipodes in Western Indonesia: Spatiotemporal and Geochemical Considerations
AN ABSTRACT OF THE DISSERTATION OF Morgan J. Salisbury for the degree of Doctor of Philosophy in Geology presented on June 3, 2011. Title: Convergent Margin Magmatism in the Central Andes and its Near Antipodes in Western Indonesia: Spatiotemporal and Geochemical Considerations Abstract approved: ________________________________________________________________________ Adam J.R. Kent This dissertation combines volcanological research of three convergent continental margins. Chapters 1 and 5 are general introductions and conclusions, respectively. Chapter 2 examines the spatiotemporal development of the Altiplano-Puna volcanic complex in the Lípez region of southwest Bolivia, a locus of a major Neogene ignimbrite flare- up, yet the least studied portion of the Altiplano-Puna volcanic complex of the Central Andes. New mapping and laser-fusion 40Ar/39Ar dating of sanidine and biotite from 56 locations, coupled with paleomagnetic data, refine the timing and volumes of ignimbrite emplacement in Bolivia and northern Chile to reveal that monotonous intermediate volcanism was prodigious and episodic throughout the complex. 40Ar/39Ar age determinations of 13 ignimbrites from northern Chile previously dated by the K-Ar method improve the overall temporal resolution of Altiplano-Puna volcanic complex development. Together with new and updated volume estimates, the new age determinations demonstrate a distinct onset of Altiplano-Puna volcanic complex ignimbrite volcanism with modest output rates beginning ~11 Ma, an episodic middle phase with the highest eruption rates between 8 and 3 Ma, followed by a general decline in volcanic output. The cyclic nature of individual caldera complexes and the spatiotemporal pattern of the volcanic field as a whole are consistent with both incremental construction of plutons as well as a composite Cordilleran batholith.