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Mars Impact Crater Or Supervolcano? 12 April 2018
Mars impact crater or supervolcano? 12 April 2018 floor, which is covered by flat, icy deposits that show signs of flow and movement – these are likely akin to rocky, ice-rich glaciers, which have built up over time in the cold and arid climate. Mars Express view of Ismenia Patera. Credit: ESA/DLR/FU Berlin, CC BY-SA 3.0 IGO These images from ESA's Mars Express show a crater named Ismenia Patera on the Red Planet. Its origin remains uncertain: did a meteorite smash into the surface or could it be the remnants of a supervolcano? Ismenia Patera – patera meaning 'flat bowl' in Latin – sits in the Arabia Terra region on Mars. This a transition area between the planet's northern and southern regions – an especially intriguing part of the surface. Ismenia Patera in context within Arabia Terra. Credit: NASA MGS MOLA Science Team Mars' topography is clearly split into two parts: the northern lowlands and the southern highlands, the latter sitting up to a few kilometres higher. This These images were taken on 1 January by the high- divide is a key topic of interest for scientists resolution stereo camera on Mars Express, which studying the Red Planet. Ideas for how this has been circling the planet since 2003. dramatic split formed suggest either a massive single impact, multiple impacts or ancient plate Such high-resolution and detailed images shed light tectonics as seen on Earth, but its origin remains on numerous aspects of Mars – for example, how unclear. the features seen scarring the surface formed in the first place, and how they have evolved in the many Ismenia Patera is some 75 km across. -
Curiosity's Candidate Field Site in Gale Crater, Mars
Curiosity’s Candidate Field Site in Gale Crater, Mars K. S. Edgett – 27 September 2010 Simulated view from Curiosity rover in landing ellipse looking toward the field area in Gale; made using MRO CTX stereopair images; no vertical exaggeration. The mound is ~15 km away 4th MSL Landing Site Workshop, 27–29 September 2010 in this view. Note that one would see Gale’s SW wall in the distant background if this were Edgett, 1 actually taken by the Mastcams on Mars. Gale Presents Perhaps the Thickest and Most Diverse Exposed Stratigraphic Section on Mars • Gale’s Mound appears to present the thickest and most diverse exposed stratigraphic section on Mars that we can hope access in this decade. • Mound has ~5 km of stratified rock. (That’s 3 miles!) • There is no evidence that volcanism ever occurred in Gale. • Mound materials were deposited as sediment. • Diverse materials are present. • Diverse events are recorded. – Episodes of sedimentation and lithification and diagenesis. – Episodes of erosion, transport, and re-deposition of mound materials. 4th MSL Landing Site Workshop, 27–29 September 2010 Edgett, 2 Gale is at ~5°S on the “north-south dichotomy boundary” in the Aeolis and Nepenthes Mensae Region base map made by MSSS for National Geographic (February 2001); from MOC wide angle images and MOLA topography 4th MSL Landing Site Workshop, 27–29 September 2010 Edgett, 3 Proposed MSL Field Site In Gale Crater Landing ellipse - very low elevation (–4.5 km) - shown here as 25 x 20 km - alluvium from crater walls - drive to mound Anderson & Bell -
Identification of the Deepest Craters on Mars Based on the Preservation
IDENTIFCATION OF THE DEEPEST CRATERS ON MARS BASED ON THE PRESERVATION OF PITTED IMPACT MELT-BEARING DEPOSITS. L. L. Tornabene1,2, V. Ling3, J. M. Boyce4, G. R. Osinski1,5, T. N. Harrison1, and A. S. McEwen6, 1Dept. of Earth Sciences & Centre for Planetary Science and Exploration, Western University, London, ON, N6A 5B7, Canada ([email protected]), 2SETI Institute, Mountain View, CA 94043, USA, 3Central Secondary School, London, ON, N6B 2P8, Canada, 4Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA, 5Dept. Physics & Astronomy, Western University, London, ON, N6A 5B7, Canada, 6Lunar and Planetary Laborato- ry, University of Arizona, Tucson, AZ 85721, USA. Introduction: Crater-related pitted materials, were avoided. As such, the lowest elevation on the thought to be impact melt-rich deposits formed from floor off the central pit was used instead. Likewise, any volatile-rich substrates, have been observed in high- overprinting primary or secondary impact craters on resolution images of both the youngest and best- the host crater floors were avoided – again, using the preserved craters on both Mars and Vesta [1–3]. To next lowest elevation that clearly fell on “unmodified” date, 205 such craters have been identified on Mars host crater floor. After plotting all the dr vs. D values, ranging from 1–150 km in diameter, and are randomly outliers (i.e., extremely deep or shallow craters) were distributed between ~60°S and 60°N latitudes [1]. assessed carefully with respect to pre-existing topogra- Because pitted materials likely represent the prima- phy and post-impact modification. Craters with uneven ry crater-fill deposits, and show a strong correlation or complex background terrains, or craters that over- with crater preservation [1–3], we explore their use to printed other craters, specifically in the vicinity of the reassess depth-to-Diameter (d/D) scaling relationship rim or the floor were noted, adjusted if possible or not using Mars Orbiter Laser Altimeter (MOLA) data. -
Minutes of the January 25, 2010, Meeting of the Board of Regents
MINUTES OF THE JANUARY 25, 2010, MEETING OF THE BOARD OF REGENTS ATTENDANCE This scheduled meeting of the Board of Regents was held on Monday, January 25, 2010, in the Regents’ Room of the Smithsonian Institution Castle. The meeting included morning, afternoon, and executive sessions. Board Chair Patricia Q. Stonesifer called the meeting to order at 8:31 a.m. Also present were: The Chief Justice 1 Sam Johnson 4 John W. McCarter Jr. Christopher J. Dodd Shirley Ann Jackson David M. Rubenstein France Córdova 2 Robert P. Kogod Roger W. Sant Phillip Frost 3 Doris Matsui Alan G. Spoon 1 Paul Neely, Smithsonian National Board Chair David Silfen, Regents’ Investment Committee Chair 2 Vice President Joseph R. Biden, Senators Thad Cochran and Patrick J. Leahy, and Representative Xavier Becerra were unable to attend the meeting. Also present were: G. Wayne Clough, Secretary John Yahner, Speechwriter to the Secretary Patricia L. Bartlett, Chief of Staff to the Jeffrey P. Minear, Counselor to the Chief Justice Secretary T.A. Hawks, Assistant to Senator Cochran Amy Chen, Chief Investment Officer Colin McGinnis, Assistant to Senator Dodd Virginia B. Clark, Director of External Affairs Kevin McDonald, Assistant to Senator Leahy Barbara Feininger, Senior Writer‐Editor for the Melody Gonzales, Assistant to Congressman Office of the Regents Becerra Grace L. Jaeger, Program Officer for the Office David Heil, Assistant to Congressman Johnson of the Regents Julie Eddy, Assistant to Congresswoman Matsui Richard Kurin, Under Secretary for History, Francisco Dallmeier, Head of the National Art, and Culture Zoological Park’s Center for Conservation John K. -
1922 Elizabeth T
co.rYRIG HT, 192' The Moootainetro !scot1oror,d The MOUNTAINEER VOLUME FIFTEEN Number One D EC E M BER 15, 1 9 2 2 ffiount Adams, ffiount St. Helens and the (!oat Rocks I ncoq)Ora,tecl 1913 Organized 190!i EDITORlAL ST AitF 1922 Elizabeth T. Kirk,vood, Eclttor Margaret W. Hazard, Associate Editor· Fairman B. L�e, Publication Manager Arthur L. Loveless Effie L. Chapman Subsc1·iption Price. $2.00 per year. Annual ·(onl�') Se,·ent�·-Five Cents. Published by The Mountaineers lncorJ,orated Seattle, Washington Enlerecl as second-class matter December 15, 19t0. at the Post Office . at . eattle, "\Yash., under the .-\0t of March 3. 1879. .... I MOUNT ADAMS lllobcl Furrs AND REFLEC'rION POOL .. <§rtttings from Aristibes (. Jhoutribes Author of "ll3ith the <6obs on lltount ®l!!mµus" �. • � J� �·,,. ., .. e,..:,L....._d.L.. F_,,,.... cL.. ��-_, _..__ f.. pt",- 1-� r�._ '-';a_ ..ll.-�· t'� 1- tt.. �ti.. ..._.._....L- -.L.--e-- a';. ��c..L. 41- �. C4v(, � � �·,,-- �JL.,�f w/U. J/,--«---fi:( -A- -tr·�� �, : 'JJ! -, Y .,..._, e� .,...,____,� � � t-..__., ,..._ -u..,·,- .,..,_, ;-:.. � --r J /-e,-i L,J i-.,( '"'; 1..........,.- e..r- ,';z__ /-t.-.--,r� ;.,-.,.....__ � � ..-...,.,-<. ,.,.f--· :tL. ��- ''F.....- ,',L � .,.__ � 'f- f-� --"- ��7 � �. � �;')'... f ><- -a.c__ c/ � r v-f'.fl,'7'71.. I /!,,-e..-,K-// ,l...,"4/YL... t:l,._ c.J.� J..,_-...A 'f ',y-r/� �- lL.. ��•-/IC,/ ,V l j I '/ ;· , CONTENTS i Page Greetings .......................................................................tlristicles }!}, Phoiitricles ........ r The Mount Adams, Mount St. Helens, and the Goat Rocks Outing .......................................... B1/.ith Page Bennett 9 1 Selected References from Preceding Mount Adams and Mount St. -
General Index
General Index Italicized page numbers indicate figures and tables. Color plates are in- cussed; full listings of authors’ works as cited in this volume may be dicated as “pl.” Color plates 1– 40 are in part 1 and plates 41–80 are found in the bibliographical index. in part 2. Authors are listed only when their ideas or works are dis- Aa, Pieter van der (1659–1733), 1338 of military cartography, 971 934 –39; Genoa, 864 –65; Low Coun- Aa River, pl.61, 1523 of nautical charts, 1069, 1424 tries, 1257 Aachen, 1241 printing’s impact on, 607–8 of Dutch hamlets, 1264 Abate, Agostino, 857–58, 864 –65 role of sources in, 66 –67 ecclesiastical subdivisions in, 1090, 1091 Abbeys. See also Cartularies; Monasteries of Russian maps, 1873 of forests, 50 maps: property, 50–51; water system, 43 standards of, 7 German maps in context of, 1224, 1225 plans: juridical uses of, pl.61, 1523–24, studies of, 505–8, 1258 n.53 map consciousness in, 636, 661–62 1525; Wildmore Fen (in psalter), 43– 44 of surveys, 505–8, 708, 1435–36 maps in: cadastral (See Cadastral maps); Abbreviations, 1897, 1899 of town models, 489 central Italy, 909–15; characteristics of, Abreu, Lisuarte de, 1019 Acequia Imperial de Aragón, 507 874 –75, 880 –82; coloring of, 1499, Abruzzi River, 547, 570 Acerra, 951 1588; East-Central Europe, 1806, 1808; Absolutism, 831, 833, 835–36 Ackerman, James S., 427 n.2 England, 50 –51, 1595, 1599, 1603, See also Sovereigns and monarchs Aconcio, Jacopo (d. 1566), 1611 1615, 1629, 1720; France, 1497–1500, Abstraction Acosta, José de (1539–1600), 1235 1501; humanism linked to, 909–10; in- in bird’s-eye views, 688 Acquaviva, Andrea Matteo (d. -
Lexiconordica
LexicoNordica Forfatter: Hannu Tommola og Arto Mustajoki [Den förnyade rysk-finska storordboken] Anmeldt værk: Martti Kuusinen, Vera Ollikainen og Julia Syrjäläinen. 1997. Venäjä- suomi-suursanakirja (Bol ´šoj russko-finskij slovar´) yli 90.000 hakusanaa ja sanontaa. Porvoo/Helsinki/Juva: WSOY og Moskva: Russkij jazyk, 1997. Kilde: LexicoNordica 5, 1998, s. 239-260 URL: http://ojs.statsbiblioteket.dk/index.php/lexn/issue/archive © LexicoNordica og forfatterne Betingelser for brug af denne artikel Denne artikel er omfattet af ophavsretsloven, og der må citeres fra den. Følgende betingelser skal dog være opfyldt: Citatet skal være i overensstemmelse med „god skik“ Der må kun citeres „i det omfang, som betinges af formålet“ Ophavsmanden til teksten skal krediteres, og kilden skal angives, jf. ovenstående bibliografiske oplysninger. Søgbarhed Artiklerne i de ældre LexicoNordica (1-16) er skannet og OCR-behandlet. OCR står for ’optical character recognition’ og kan ved tegngenkendelse konvertere et billede til tekst. Dermed kan man søge i teksten. Imidlertid kan der opstå fejl i tegngenkendelsen, og når man søger på fx navne, skal man være forberedt på at søgningen ikke er 100 % pålidelig. 239 Hannu Tommola & Arto Mustajoki Den förnyade rysk-finska storordboken Martti Kuusinen, Vera Ollikainen, Julia Syrjäläinen: Venäjä-suomi- suursanakirja (Bol´soj russko-finskij slovar´) yli 90.000 hakusanaa ja sanontaa. Toim. M. Kuusinen. Porvoo, Helsinki, Juva: WSOY & Moskva: Russkij jazyk, 1997, XXXI + 1575 s. Pris: FIM 554. The dictionary reviewed in this article is a revised edition of a Russian-Finnish dictionary compiled by scholars in the former Soviet Karelia. The dictionary was first published in 1963 in Moscow, then reprinted twice by the Finnish publishing house WSOY. -
Martian Crater Morphology
ANALYSIS OF THE DEPTH-DIAMETER RELATIONSHIP OF MARTIAN CRATERS A Capstone Experience Thesis Presented by Jared Howenstine Completion Date: May 2006 Approved By: Professor M. Darby Dyar, Astronomy Professor Christopher Condit, Geology Professor Judith Young, Astronomy Abstract Title: Analysis of the Depth-Diameter Relationship of Martian Craters Author: Jared Howenstine, Astronomy Approved By: Judith Young, Astronomy Approved By: M. Darby Dyar, Astronomy Approved By: Christopher Condit, Geology CE Type: Departmental Honors Project Using a gridded version of maritan topography with the computer program Gridview, this project studied the depth-diameter relationship of martian impact craters. The work encompasses 361 profiles of impacts with diameters larger than 15 kilometers and is a continuation of work that was started at the Lunar and Planetary Institute in Houston, Texas under the guidance of Dr. Walter S. Keifer. Using the most ‘pristine,’ or deepest craters in the data a depth-diameter relationship was determined: d = 0.610D 0.327 , where d is the depth of the crater and D is the diameter of the crater, both in kilometers. This relationship can then be used to estimate the theoretical depth of any impact radius, and therefore can be used to estimate the pristine shape of the crater. With a depth-diameter ratio for a particular crater, the measured depth can then be compared to this theoretical value and an estimate of the amount of material within the crater, or fill, can then be calculated. The data includes 140 named impact craters, 3 basins, and 218 other impacts. The named data encompasses all named impact structures of greater than 100 kilometers in diameter. -
Origin of Circular Collapsed Landforms in the Chryse Region of Mars ⇑ Manuel Roda A,B, , Maarten G
Icarus 265 (2016) 70–78 Contents lists available at ScienceDirect Icarus journal homepage: www.journals.elsevier.com/icarus Origin of circular collapsed landforms in the Chryse region of Mars ⇑ Manuel Roda a,b, , Maarten G. Kleinhans b, Tanja E. Zegers b, Rob Govers b a Universitá degli Studi di Milano, Dipartimento di Scienze della Terra, Via Mangiagalli, 34, 20133 Milano, Italy b Universiteit Utrecht, Faculty of Geosciences, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands article info abstract Article history: The quasi-circular collapsed landforms occurring in the Chryse region of Mars share similar morpholog- Received 29 June 2015 ical characteristics, such as depth of collapse and polygonally fractured floors. Here, we present a statis- Revised 20 October 2015 tical analysis of diameter, maximum and minimum depth, and amount of collapse of these features. Accepted 21 October 2015 Based on their morphometric characteristics, we find that these landforms have a common origin. In par- Available online 27 October 2015 ticular, the investigated landforms show diameter-depth correlations similar to those that impact craters of equivalent diameters exhibit. We also find that the observed amount of collapse of the collected fea- Keywords: tures is strongly correlated to their diameter. Furthermore, the linear relation between minimum filling Geological processes and pristine depth of craters, the constant ratio between collapse and the amount of filling and the frac- Ices Impact processes tured and chaotic aspect of the filling agree with melting and subsequent collapse of an ice layer below a Mars, surface sediment layer. This interpretation is consistent with a buried sub-ice lake scenario, which is a non-climatic mechanism for producing and storing abundant liquid water under martian conditions. -
Understanding the History of Arabia Terra, Mars Through Crater-Based Tests Karalee Brugman University of Colorado Boulder
University of Colorado, Boulder CU Scholar Undergraduate Honors Theses Honors Program Spring 2014 Understanding the History of Arabia Terra, Mars Through Crater-Based Tests Karalee Brugman University of Colorado Boulder Follow this and additional works at: http://scholar.colorado.edu/honr_theses Recommended Citation Brugman, Karalee, "Understanding the History of Arabia Terra, Mars Through Crater-Based Tests" (2014). Undergraduate Honors Theses. Paper 55. This Thesis is brought to you for free and open access by Honors Program at CU Scholar. It has been accepted for inclusion in Undergraduate Honors Theses by an authorized administrator of CU Scholar. For more information, please contact [email protected]. ! UNDERSTANDING+THE+HISTORY+OF+ARABIA+TERRA,+MARS++ THROUGH+CRATER4BASED+TESTS+ Karalee K. Brugman Geological Sciences Departmental Honors Thesis University of Colorado Boulder April 4, 2014 Thesis Advisor Brian M. Hynek | Geological Sciences Committee Members Charles R. Stern | Geological Sciences Fran Bagenal | Astrophysical and Planetary Sciences Stephen J. Mojzsis | Geological Sciences ABSTRACT' Arabia Terra, a region in the northern hemisphere of Mars, has puzzled planetary scientists because of its odd assemblage of characteristics. This makes the region difficult to categorize, much less explain. Over the past few decades, several hypotheses for the geological history of Arabia Terra have been posited, but so far none are conclusive. For this study, a subset of the Mars crater database [Robbins and Hynek, 2012a] was reprocessed using a new algorithm [Robbins and Hynek, 2013]. Each hypothesis’s effect on the crater population was predicted, then tested via several crater population characteristics including cumulative size-frequency distribution, depth-to-diameter ratio, and rim height. -
Mount Mazama: Explosion Versus Collapse
Mount Mazama: Explosion versus Collapse WARREN D. SMITH, Ph.D. Professor of Geology University of Oregon CARL R. SWAR TZLOW, Ph.D. Park N aturalist Lassen National Park [Reprint from Bulletin of Geological Society of America. Vol. XLVII , December 1936. ] .. (. I I University of O regon EUGENE BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA VOL. 47, PP. 1809-taso. 6 PLS., s FIGS. DECEMBER 31, 1936 MOUNT MAZAMA: EXPLOSION VERSUS COLLAPSE ~y WARREN D. SMITH AND CARL R. SWARTZLOW CONTENTS -Page Introduction ..................................................... •.:..... • 1809 Distribution, character, and amount of erupted material ..•.......• ·• . • . • . • . • 1812 Dillcr's "bn.ckflow" in Clcctwood Cove. • • . • . • • . • .. • . • • • . • • . .. • 1816 Shape nnd character of the crater. • . • . • . • • . • . • . • • • • . • . 1817 Absence of extruded lava of recent date. • . • • • . • . • • • • . • • . 1821 UNIVERSITY OF OREGON MONOGRAPHS· I\1nterinls of the rim . • . • • . • . • . • . • • • • • . 1822 · l\1cchanics of coJiapse. • • . • • • • . • . • • • • . 1824 Studies in Geology and Geography Records of some Pacific rim volcanoes .......•••••••... ·. • • • . • • . • • . • 1827 No; 1. February 1937 Summary and conclusions ........•.......•..•..••••.•.....•....•.•..•..•.• 1820 Published by' the University of Oregon Oregon State System of Higher ·· ILLUSTRATIONS Education, Eugene, Oregon Figure Pago I. Cross section of Crater Lake ............•••...•••••.....•••...••.••. : .. 1810 2. Pumice areas. • • • • . • . • . • . 1813 3. Section in Wheeler -
Late Miocene -Quaternary Forearc Uplift In
Late Miocene - Quaternary forearc uplift in southern Peru: new insights from 10 Be dates and rocky coastal sequences Vincent Regard, Joseph Martinod, Marianne Saillard, Sébastien Carretier, Laëtitia Leanni, Laurence Audin, Kevin Pedoja To cite this version: Vincent Regard, Joseph Martinod, Marianne Saillard, Sébastien Carretier, Laëtitia Leanni, et al.. Late Miocene - Quaternary forearc uplift in southern Peru: new insights from 10 Be dates and rocky coastal sequences. Journal of South American Earth Sciences, Elsevier, 2021, 8th ISAG Special Issue, 109, pp.103261. 10.1016/j.jsames.2021.103261. hal-03162682 HAL Id: hal-03162682 https://hal.archives-ouvertes.fr/hal-03162682 Submitted on 8 Mar 2021 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. Late Miocene - Quaternary forearc uplift in southern Peru: new insights from 10Be dates and rocky coastal sequences 5 Vincent Regard1*, Joseph Martinod2, Marianne Saillard3, Sébastien Carretier1, Laetitia Leanni4, Gérard Hérail1, Laurence Audin2, Kevin Pedoja5 1. Géosciences Environnement Toulouse/OMP, Université de Toulouse, CNES, CNRS, IRD, UPS, Toulouse, France 2. Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, France. 10 3. Université Côte d'Azur, IRD, CNRS, Observatoire de la Côte d'Azur, Géoazur, 250 rue Albert Einstein, Sophia Antipolis 06560 Valbonne, France.