Prospects and Pitfalls in Integrating Volcanology and Archaeology: Areview
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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. -
1350-5 Geologist
POSITION DESCRIPTION 1. Position Number 2. Explanation (show any positions replaced) 3. Reason for Submission New Redescription Reestablishment Standardized PD Other 4. Service 5. Subject to Identical Addition (IA) Action HQ Field Yes (multiple use) No (single incumbent) 6. Position Specifications 7. Financial Statement Required 10. Position Sensitivity and Risk Designation Subject to Random Drug Testing Yes No Executive Personnel-OGE-278 Non-Sensitive Employment and Financial Interest-OGE-450 Non-Sensitive: Low-Risk Subject to Medical Standards/Surveillance Yes No None required Public Trust Telework Suitable Yes No 8. Miscellaneous 9. Full Performance Level Non-Sensitive: Moderate-Risk Fire Position Yes No Functional Code: -- Pay Plan: Non-Sensitive: High-Risk Law Enforcement Position Yes No BUS: - - Grade: National Security 11. Position is 12. Position Status Noncritical-Sensitive: Moderate-Risk Competitive SES Noncritical-Sensitive: High-Risk 2-Supervisory Excepted (specify in remarks) SL/ST Critical-Sensitive: High-Risk 4-Supervisor (CSRA) 13. Duty Station Special Sensitive: High-Risk 5-Management Official 6-Leader: Type I 14. Employing Office Location 15. Fair Labor Standards Act Exempt Nonexempt 7-Leader: Type II 16. Cybersecurity Code 17. Competitive Area Code: 8-Non-Supervisory #1: #2: - - #3: - - Competitive Level Code: 18. Classified/Graded by Official Title of Position Pay Plan Occupational Code Grade Initial Date a. Department, Bureau, or Office b. Second Level Review -- -- 19. Organizational Title of Position (if different from, or in addition to, official title) 20. Name of Employee (if vacant, specify) 21. Department, Agency, or Establishment c. Third Subdivision U.S. Department of the Interior a. Bureau/First Subdivision d. -
A Pictorial Summary of the Life and Work of George Patrick Leonard Walker
A pictorial summary of the life and work of George Patrick Leonard Walker SCOTT K. ROWLAND1* & R. S. J. SPARKS2 1Department of Geology and Geophysics, University of Hawaii at Manoa, 1680 East–West Road, Honolulu, Hawaii, USA 2Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK *Corresponding author (e-mail: [email protected]) Abstract: George Patrick Leonard Walker was one of the fathers of modern volcanology. He worked in many parts of the world and contributed to the understanding of a huge range of volca- nological processes. He was a field geologist at heart, and one of his greatest skills was the ability to quantify volcanological ideas – not with obscure statistical treatments or complex numerical models, but with clear graphical relationships supported by tremendous amounts of carefully col- lected field data. Here we present some glimpses of his life and work in photographs and diagrams. George Walker was born on 2 March 1926 in Iceland, as well as to India, Italy, the Azores and London. In 1939, when he was 13, the family Africa, among other locations. In 1978 George moved to Northern Ireland. In 1948 and 1949, moved to the University of Auckland and in 1982 respectively, George received his Bachelors and he moved to the University of Hawaii. Over the Masters degrees from Queen’s University, Belfast. span of his career he visited almost every volcanic In 1956 he completed his PhD at the University of region in the world, including Australia, the Azores, Leeds with a dissertation on secondary minerals in the Canary Islands, Chile, China, Costa Rica, igneous rocks of Northern Iceland. -
GEOLOGY What Can I Do with This Major?
GEOLOGY What can I do with this major? AREAS EMPLOYERS STRATEGIES Some employment areas follow. Many geolo- gists specialize at the graduate level. ENERGY (Oil, Coal, Gas, Other Energy Sources) Stratigraphy Petroleum industry including oil and gas explora- Geologists working in the area of energy use vari- Sedimentology tion, production, storage and waste disposal ous methods to determine where energy sources are Structural Geology facilities accumulated. They may pursue work tasks including Geophysics Coal industry including mining exploration, grade exploration, well site operations and mudlogging. Geochemistry assessment and waste disposal Seek knowledge in engineering to aid communication, Economic Geology Federal government agencies: as geologists often work closely with engineers. Geomorphology National Labs Coursework in geophysics is also advantageous Paleontology Department of Energy for this field. Fossil Energy Bureau of Land Management Gain experience with computer modeling and Global Hydrogeology Geologic Survey Positioning System (GPS). Both are used to State government locate deposits. Consulting firms Many geologists in this area of expertise work with oil Well services and drilling companies and gas and may work in the geographic areas Oil field machinery and supply companies where deposits are found including offshore sites and in overseas oil-producing countries. This industry is subject to fluctuations, so be prepared to work on a contract basis. Develop excellent writing skills to publish reports and to solicit grants from government, industry and private foundations. Obtain leadership experience through campus organi- zations and work experiences for project man- agement positions. (Geology, Page 2) AREAS EMPLOYERS STRATEGIES ENVIRONMENTAL GEOLOGY Sedimentology Federal government agencies: Geologists in this category may focus on studying, Hydrogeology National Labs protecting and reclaiming the environment. -
A Ballistics Analysis of the Deep Impact Ejecta Plume: Determining Comet Tempel 1’S Gravity, Mass, and Density
Icarus 190 (2007) 357–390 www.elsevier.com/locate/icarus A ballistics analysis of the Deep Impact ejecta plume: Determining Comet Tempel 1’s gravity, mass, and density James E. Richardson a,∗,H.JayMeloshb, Carey M. Lisse c, Brian Carcich d a Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA b Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721-0092, USA c Planetary Exploration Group, Space Department, Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA d Center for Radiophysics and Space Research, Cornell University, Ithaca, NY 14853, USA Received 31 March 2006; revised 8 August 2007 Available online 15 August 2007 Abstract − In July of 2005, the Deep Impact mission collided a 366 kg impactor with the nucleus of Comet 9P/Tempel 1, at a closing speed of 10.2 km s 1. In this work, we develop a first-order, three-dimensional, forward model of the ejecta plume behavior resulting from this cratering event, and then adjust the model parameters to match the flyby-spacecraft observations of the actual ejecta plume, image by image. This modeling exercise indicates Deep Impact to have been a reasonably “well-behaved” oblique impact, in which the impactor–spacecraft apparently struck a small, westward-facing slope of roughly 1/3–1/2 the size of the final crater produced (determined from initial ejecta plume geometry), and possessing an effective strength of not more than Y¯ = 1–10 kPa. The resulting ejecta plume followed well-established scaling relationships for cratering in a medium-to-high porosity target, consistent with a transient crater of not more than 85–140 m diameter, formed in not more than 250–550 s, for the case of Y¯ = 0 Pa (gravity-dominated cratering); and not less than 22–26 m diameter, formed in not less than 1–3 s, for the case of Y¯ = 10 kPa (strength-dominated cratering). -
Impact Cratering
6 Impact cratering The dominant surface features of the Moon are approximately circular depressions, which may be designated by the general term craters … Solution of the origin of the lunar craters is fundamental to the unravel- ing of the history of the Moon and may shed much light on the history of the terrestrial planets as well. E. M. Shoemaker (1962) Impact craters are the dominant landform on the surface of the Moon, Mercury, and many satellites of the giant planets in the outer Solar System. The southern hemisphere of Mars is heavily affected by impact cratering. From a planetary perspective, the rarity or absence of impact craters on a planet’s surface is the exceptional state, one that needs further explanation, such as on the Earth, Io, or Europa. The process of impact cratering has touched every aspect of planetary evolution, from planetary accretion out of dust or planetesimals, to the course of biological evolution. The importance of impact cratering has been recognized only recently. E. M. Shoemaker (1928–1997), a geologist, was one of the irst to recognize the importance of this process and a major contributor to its elucidation. A few older geologists still resist the notion that important changes in the Earth’s structure and history are the consequences of extraterres- trial impact events. The decades of lunar and planetary exploration since 1970 have, how- ever, brought a new perspective into view, one in which it is clear that high-velocity impacts have, at one time or another, affected nearly every atom that is part of our planetary system. -
Mars Field Geology, Biology, and Paleontology Workshop, Summary
MARS FIELD GEOLOGY, BIOLOGY, AND PALEONTOLOGY WORKSHOP: SUMMARY AND RECOMMENDATIONS November 18–19, 1998 Space Center Houston, Houston, Texas LPI Contribution No. 968 MARS FIELD GEOLOGY, BIOLOGY, AND PALEONTOLOGY WORKSHOP: SUMMARY AND RECOMMENDATIONS November 18–19, 1998 Space Center Houston Edited by Nancy Ann Budden Lunar and Planetary Institute Sponsored by Lunar and Planetary Institute National Aeronautics and Space Administration Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 968 Compiled in 1999 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the Universities Space Research Association under Contract No. NASW-4574 with the National Aeronautcis and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as the appropriate acknowledgment of this publication. This volume may be cited as Budden N. A., ed. (1999) Mars Field Geology, Biology, and Paleontology Workshop: Summary and Recommendations. LPI Contribution No. 968, Lunar and Planetary Institute, Houston. 80 pp. This volume is distributed by ORDER DEPARTMENT Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 Phone: 281-486-2172 Fax: 281-486-2186 E-mail: [email protected] Mail order requestors will be invoiced for the cost of shipping and handling. _________________ Cover: Mars test suit subject and field geologist Dean Eppler overlooking Meteor Crater, Arizona, in Mark III Mars EVA suit. PREFACE In November 1998 the Lunar and Planetary Institute, under the sponsorship of the NASA/HEDS (Human Exploration and Development of Space) Enterprise, held a workshop to explore the objectives, desired capabilities, and operational requirements for the first human exploration of Mars. -
East-African Rift System Geological Settings of Geothermal Resources and Their Prospects
Presented at Short Course III on Exploration for Geothermal Resources, organized by UNU-GTP and KenGen, at Lake Naivasha, Kenya, October 24 - November 17, 2008. GEOTHERMAL TRAINING PROGRAMME Kenya Electricity Generating Co., Ltd. EAST-AFRICAN RIFT SYSTEM GEOLOGICAL SETTINGS OF GEOTHERMAL RESOURCES AND THEIR PROSPECTS Kristján Saemundsson ISOR – Iceland GeoSurvey Grensásvegur 9 108 Reykjavík ICELAND [email protected] 1. INTRODUCTION The geothermal areas of the East-African Rift System are not all of the same type. Even though related to the Rift the geological settings are different. Some are volcanic, others are not. Parts of the rift zones are highly volcanic but large segments of them are sediment or lake filled grabens. Extreme cases are also found where rift-related fractures produce permeability in basement rocks. In retrospect it may be useful to point out the differences and likely resource characteristics. Below seven types are described, and in which countries they occur as the dominant type. Three of those types are genuine high-temperature geothermal resources. Two may be accessible only in the off flow zone of high-temperature geothermal fields. One is of the sedimentary basin type resource of low to medium temperature, and one other of the low-temperature type is related to fractured basement rock. 2. OFF RIFT VOLCANOES Eritrea (Alid), Yemen (Al Lisi): Volcanic HT-systems suitable for back pressure turbines Main resource at rather high ground (Eritrea) Off flow probably present, perhaps suitable for binary In case of off flow temperature inversion likely Research methods: Geology/volcanology, hydrology, geochemistry, TEM/MT, airborne magnetics, seismicity, gravity 3. -
Journal of Volcanology and Geothermal Research
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH An International Journal on the Geophysical, Geochemical, Petrological, Economic and Environmental Aspects of Volcanology and Geothermal Research AUTHOR INFORMATION PACK TABLE OF CONTENTS XXX . • Description p.1 • Audience p.1 • Impact Factor p.1 • Abstracting and Indexing p.2 • Editorial Board p.2 • Guide for Authors p.4 ISSN: 0377-0273 DESCRIPTION . An international research journal with focus on volcanic and geothermal processes and their impact on the environment and society. Submission of papers covering the following aspects of volcanology and geothermal research are encouraged: (1) Geological aspects of volcanic systems: volcano stratigraphy, structure and tectonic influence; eruptive history; evolution of volcanic landforms; eruption style and progress; dispersal patterns of lava and ash; analysis of real-time eruption observations. (2) Geochemical and petrological aspects of volcanic rocks: magma genesis and evolution; crystallization; volatile compositions, solubility, and degassing; volcanic petrography and textural analysis. (3) Hydrology, geochemistry and measurement of volcanic and hydrothermal fluids: volcanic gas emissions; fumaroles and springs; crater lakes; hydrothermal mineralization. (4) Geophysical aspects of volcanic systems: physical properties of volcanic rocks and magmas; heat flow studies; volcano seismology, geodesy and remote sensing. (5) Computational modeling and experimental simulation of magmatic and hydrothermal processes: eruption dynamics; magma transport and storage; plume dynamics and ash dispersal; lava flow dynamics; hydrothermal fluid flow; thermodynamics of aqueous fluids and melts. (6) Volcano hazard and risk research: hazard zonation methodology, development of forecasting tools; assessment techniques for vulnerability and impact. The journal does not accept geothermal research papers not related to volcanism. AUDIENCE . Volcanologists, petrologists, geochemists, geothermics. -
Life in the Poisonous Breath of Sleeping Volcanos 1 April 2015
Life in the poisonous breath of sleeping volcanos 1 April 2015 eastern shore of the lake in large quantities, which could, over time accumulate in the building," as Prof. Dr. Kirsten Küsel of the Friedrich-Schiller Universiy Jena, explains the mysterious series of deaths. The lake is the crater of a volcano which last erupted about 12,000 years ago, reports the chair of Aquatic Geomicrobiology, "and up to now there are traces of volcanicity, which we regularly analyze on a yearly basis in an outdoor seminar in the degree course Biogeosciences." Hints of volcanism are given by so-called mofettes. These are small openings in the ground, leaking carbon dioxide, which originates in the magma chambers of the earth's mantel or the earth's crust. PhD student and first author of the study Felix Beulig Small wonder then, that mofettes were places that analyzes soil samples in an anaerobic chamber. Credit: are supposed to be very hostile to life. However, as Anne Günther/FSU the team of researchers around Prof. Küsel was able to demonstrate in a new study: there is life even there, although hidden underground. In a mofette close to the Czech river Plesná in north- Researchers of the University Jena analyze the western Bohemia the researchers followed the path microbial community in volcanically active soils. In of the carbon dioxide along its last few meters a mofette close to the Czech river Plesná in north- through the ground up to the surface and found western Bohemia, the team around Prof. Dr. numerous organisms that were thriving in this Kirsten Küsel found numerous organisms that were environment which seems to be so hostile to life. -
Educators Guide
EDUCATORS GUIDE 02 | Supervolcanoes Volcanism is one of the most creative and destructive processes on our planet. It can build huge mountain ranges, create islands rising from the ocean, and produce some of the most fertile soil on the planet. It can also destroy forests, obliterate buildings, and cause mass extinctions on a global scale. To understand volcanoes one must first understand the theory of plate tectonics. Plate tectonics, while generally accepted by the geologic community, is a relatively new theory devised in the late 1960’s. Plate tectonics and seafloor spreading are what geologists use to interpret the features and movements of Earth’s surface. According to plate tectonics, Earth’s surface, or crust, is made up of a patchwork of about a dozen large plates and many smaller plates that move relative to one another at speeds ranging from less than one to ten centimeters per year. These plates can move away from each other, collide into each other, slide past each other, or even be forced beneath each other. These “subduction zones” are generally where the most earthquakes and volcanoes occur. Yellowstone Magma Plume (left) and Toba Eruption (cover page) from Supervolcanoes. 01 | Supervolcanoes National Next Generation Science Standards Content Standards - Middle School Content Standards - High School MS-ESS2-a. Use plate tectonic models to support the HS-ESS2-a explanation that, due to convection, matter Use Earth system models to support cycles between Earth’s surface and deep explanations of how Earth’s internal and mantle. surface processes operate concurrently at different spatial and temporal scales to MS-ESS2-e form landscapes and seafloor features. -
Radiocarbon Age of the Laacher See Tephra: 11,230 +/- 40 BP
Radiocarbon Age of the Laacher See Tephra: 11,230 +/- 40 BP Item Type Article; text Authors Hajdas, Irena; Ivy-Ochs, S. D.; Bonani, Georges; Lotter, André F.; Zolitschka, Bernd; Schlüchter, Christian Citation Hajdas, I., Ivy-Ochs, S. D., Bonani, G., Lotter, A. F., Zolitschka, B., & Schlüchter, C. (1995). Radiocarbon age of the Laacher See tephra: 11,230 +/- 40 BP. Radiocarbon, 37(2), 149-154. DOI 10.1017/S0033822200030587 Publisher Department of Geosciences, The University of Arizona Journal Radiocarbon Rights Copyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved. Download date 27/09/2021 00:24:15 Item License http://rightsstatements.org/vocab/InC/1.0/ Version Final published version Link to Item http://hdl.handle.net/10150/653373 RADIOCARBON AGE OF THE LAACHER SEE TEPHRA: 11,230:t 40 BP IRENA HAJDAS,1'2 SUSAN D. IVY-OCHS,1,3 GEORGES BONANI,1 ANDRE F. LOITER, 2 BERND ZOLITSCHK44 and CHRISTIAN SCHL UCHTER5 ABSTRACT. The Laacher See Tephra (LST) layer provides a unique and invaluable time marker in European sediments with increasing importance because it occurs just before the onset of the Younger Dryas (YD) cold event. As the YD begins ca. 200 calendar years after the LST was deposited, accurate determination of the radiocarbon age of this ash layer will lead to a more accurate age assignment for the beginning of the YD. On the basis of 12 terrestrial plant macrofossil 14C ages derived from sediments from Soppensee, Holzmaar and Schlakenmehrener Maar, we found an age of at least 11,230 ± 40 BP for the LST event.