High Temperature Metamorphism And Crustal Anatexis

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High-temperature Metamorphism and Crustal Anatexis

Author : J.R. Ashworth
Publisher : Springer Science & Business Media
ISBN 13 : 9401539294
Total Pages : 422 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis High-temperature Metamorphism and Crustal Anatexis by : J.R. Ashworth

Download or read book High-temperature Metamorphism and Crustal Anatexis written by J.R. Ashworth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second volume in the new series produced by the Mineralogical Society is concerned with the study of rocks from the deep continental crust. It is, we hope, timely to summarize recent petrological advances contributing to this field of active interest. Based mainly on review papers read at a conference, the chapters have subsequently been revised and expanded, while the editors have produced an introductory overview as Chapter 1. The conference was the Winter Meeting of the Mineralogical Society on 15 December 1988, at wh ich Prof. R. C. Newton delivered the 20th Hallimond Lecture of the Society (which forms the basis of Ch. 7). The editors are grateful to all who contrib uted to the smooth running of the meeting at Kingston Polytechnic, and in the ensuing preparation of the volume: in particular, we sincerely thank all of the following for their labours as referees: A. J. Baker, L. M. Barron, M. J. Bickle, A. D. Chambers, J. D. Clemens, J. S. Daly, G. T. R. Droop, C. R. L. Friend, E. S. Grew, S. L. Harley, R. S. Harmon, N. B. W. Harris, B. Harte, T. J. B. Holland, N. F. C. Hudson, W. S. MacKenzie, W. Perkins, H. R. Rollinson, J. W. Sheraton, D. J. Waters, R. H. Worden and B. W. D. Yardley. John R.

The Encyclopedia of Igneous and Metamorphic Petrology

Author : Donald Bowes
Publisher : Springer Science & Business Media
ISBN 13 : 0442206232
Total Pages : 635 pages
Book Rating : 4.4/5 (422 download)

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Book Synopsis The Encyclopedia of Igneous and Metamorphic Petrology by : Donald Bowes

Download or read book The Encyclopedia of Igneous and Metamorphic Petrology written by Donald Bowes and published by Springer Science & Business Media. This book was released on 1990-02-28 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: Featuring over 250 contributions from more than 100 earth scientists from 18 countries, The Encyclopedia of Igneous and Metamorphic Petrology deals with the nature and genesis of igneous rocks that have crystallized from molten magma, and of metamorphic rocks that are the products of re-crystallization associated with increases in temperature and pressure, mainly at considerable depths in the Earth's crust. Entries range from alkaline rocks to zeolite facies - providing information on the mineralogical, chemical and textural characters of rock types, the development of concepts and the present state of knowledge across the spectrum of igneous and metamorphic petrology, together with extensive lists of both commonly used and little used terms and bibliographies.

Geology of the Himalayan Belt

Author : B.K. Chakrabarti
Publisher : Elsevier
ISBN 13 : 0128020601
Total Pages : 266 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Geology of the Himalayan Belt by : B.K. Chakrabarti

Download or read book Geology of the Himalayan Belt written by B.K. Chakrabarti and published by Elsevier. This book was released on 2016-03-04 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geology of the Himalayan Belt: Deformation, Metamorphism, Stratigraphy presents sophisticated metamorphic and igneous rock data across various Himalayan geographic sectors, capturing their petrography, metamorphism, structure, mineralization, and regional tectonic research. With an east-west extension of about 3000 kilometers and numerous 8000 meter peaks, the Himalayas are the most spectacular mountain ranges on earth. Since the 19th century, they have provided a testing ground of global importance for the development of geodynamic concepts, from isostasy over continental collision, to more recently, feedback mechanisms between tectonics and climate. This book collects the broad range of data that's been gathered on the Himalayas over the past 50 years, providing a comprehensive analysis and interpretation on the available data that brings the scientific community a better understanding of the geological diversity and structure of the Himalayan belt, along with new techniques that have applications in a host of global geological settings. - Features a vast amount of geological research data collected in the Himalayas over the past half century - Authored by a recognized global expert on the geology of the Himalayan belt - Presents analysis and interpretation techniques to aid scientists in conducting fieldwork and research - Provides the latest information on geodynamic concepts, from isostasy over continental collision, to more recently, feedback mechanisms between tectonics and climate

Structure and Tectonics of the Indian Continental Crust and Its Adjoining Region

Author : Harish C Tewari
Publisher : Elsevier
ISBN 13 : 0128136863
Total Pages : 268 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Structure and Tectonics of the Indian Continental Crust and Its Adjoining Region by : Harish C Tewari

Download or read book Structure and Tectonics of the Indian Continental Crust and Its Adjoining Region written by Harish C Tewari and published by Elsevier. This book was released on 2018-02-07 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure and Tectonics of the Indian Continental Crust and Its Adjoining Region: Deep Seismic Studies, Second Edition, collates essential data from seismic studies of Earth's crust across India, offering an essential understanding of the tectonic development of the Indian subcontinent. Seismic studies have been carried out in various parts of India since 1972, recording crust-related seismic data for determination of velocity-depth configuration and determination of structural patterns. The book examines the details of these studies, including their synthesis and global applications. The book presents both background and applications in one cohesive volume for researchers and students of geophysics and geology. - Presents all the information and metadata of the Indian continental crust and its neighbouring regions in a cohesive way - Provides basic knowledge of the Indian subcontinent to support the discussion of seismic studies related to crustal structure - Includes all new chapter covering global applications and synthesis of the findings and observations

Metamorphism and Crustal Evolution

Author : Ram Swaroop Sharma
Publisher : Atlantic Publishers & Dist
ISBN 13 : 9788126904365
Total Pages : 416 pages
Book Rating : 4.9/5 (43 download)

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Book Synopsis Metamorphism and Crustal Evolution by : Ram Swaroop Sharma

Download or read book Metamorphism and Crustal Evolution written by Ram Swaroop Sharma and published by Atlantic Publishers & Dist. This book was released on 2005 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Book Is In Commemoration Of The Life And Work Of Professor R.S. Sharma, An Eminent Metamorphic Petrologist And Mineralogist. It Incorporates The Latest Developments In The Field Of Metamorphic Petrology. The Volume Is Divided Into Five Sections, Namely Metamorphism, Fluid Processes, Himalayan Metamorphism, Uhp/ Uht Metamorphism, And Geochronology & Geochemistry. The Book Would Be Of Great Interest To All Geoscientists Concerned With Metamorphic Processes And Crustal Evolution.The Main Topics Covered In The Book Include:The Granulite Facies, Crustal Melting, And Prograde And Retrograde Phase Equilibria In Metapelites At The Amphibolite To Granulite Facies Transition Tim E. Johnson And M. Brown; Evolution Of Early Proterozoic Metamorphism Within Tim-Yastrebovskaya Paleorift, Voronezh Crystalline Massif, East-European Platform: Metapelite Systematics, Phase Equilibrium, And P-T Conditions Tatyana N. Polyakova, Konstantin A. Savko, Vyacheslav Yu. Skryabin; Metamorphosed Carbonate-Evaporitic Rocks At Transition Of High-Pressure Amphibolite/Eclogite Facies Conditions: A Case Study From The Sare Sang Lapis-Lazuli Deposit (Afghanistan) Shah Wali Faryad; Petrogenesis And Evolution Of Peña Negra, An Anatectic Complex In The Spanish Central System M. Dolores Pereira Gómez; Polymetamorphism In The Archaean Gneiss Complex Of Shivpura Gyangarh, District Bhilwara, Rajasthan H. Thomas; Ibc Granulite In Clockwise Pressure-Temperature Regime: A Case From The Orissa Sector Of Eastern Ghats Mobile Belt S.C. Patel; Carbonates In Feldspathic Gneisses From The Granulite Facies: Implications For The Formation Of Co2-Rich Fluid Inclusions William Lamb; Growth And Exhumation Of The Lower Crust Of The Kohistan Arc, Nw Himalayas T. Yoshino And T. Okudaira; Evidence Of Upper Amphibolite Facies Metamorphism From Almora Nappe, Kumaun Himalayas Mallickarjun Joshi And A.N. Tiwari; Is Muscovite In The Mandi Granite Primary? A Guide To Distinction Between The Lower Paleozoic And Tertiary Granites Of The Himalayas S. Nag, S. Sengupta And P.K. Verma; Modeling Of P-T-T Paths Constrained By Mineral Chemistry And Monazite Dating Of Metapelites In Relationship To Mct Activity In Sikkim, Eastern Himalayas Chandra S. Dubey, E.J. Catlos And B.K. Sharma; Uhp Metamorphism And Continental Subduction/Collision J.G. Liou, T. Tsujimori, I. Katayama And S. Maruyama; Uht Metamorphism And Continental Orogenic Belts A. Mohan, I.N. Sharma And P.K. Singh; Single Zircon Dating Of Hypersthene-Bearing Granitoid From Balaram-Abu Road Area, Southern Part Of The Aravalli Mountains, Nw India: Implications For Malani Magmatism Related Thermal Event A.B. Roy, Alfred Kröner, Vivek Laul And Ritesh Purohit; Geochemistry And Petrogenesis Of The High Grade Granulites From Kodaikanal, South India D. Prakash And H. Thomas; The Lower Crust Of The Indian Shield: Its Characteristics And Evolution T.M. Mahadevan

Atlas of Migmatites

Author : E. W. Sawyer
Publisher : NRC Research Press
ISBN 13 : 0660197871
Total Pages : 389 pages
Book Rating : 4.6/5 (61 download)

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Book Synopsis Atlas of Migmatites by : E. W. Sawyer

Download or read book Atlas of Migmatites written by E. W. Sawyer and published by NRC Research Press. This book was released on 2008 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Migmatites are highly heterogeneous rocks found in high-grade metamorphic environments; they are commonly encountered in the continental crust. Until now, many geologists have been deterred from working with migmatites because of their complex appearance and an unhelpful non-genetic nomenclature. In his Atlas of Migmatites, Dr. Edward Sawyer provides genetically based definitions and a system of nomenclature with which it will be possible to describe and map migmatites effectively and to understand how combinations of factors and processes produce a bewildering morphological diversity. Migmatites are produced by partial melting; to aid the reader in the identification of migmatites, the author describes and illustrates microstructures that can be used to infer the presence of melt or a melt-producing reaction. He also describes how geochemical data can be used to infer petrological processes involved in migmatite development. This book includes the results from two decades of research in whole-rock geochemistry, partial melting, microstructural analysis and experimental deformation of partially molten rocks. It contains information from an outcrop through to a grain scale. Exceptionally well illustrated, with 272 colour plates and accompanying detailed captions, the Atlas provides descriptions and analyses of migmatites not previously available.

Volcanic and Igneous Plumbing Systems

Author : Steffi Burchardt
Publisher : Elsevier
ISBN 13 : 0128097507
Total Pages : 356 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Volcanic and Igneous Plumbing Systems by : Steffi Burchardt

Download or read book Volcanic and Igneous Plumbing Systems written by Steffi Burchardt and published by Elsevier. This book was released on 2018-05-09 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volcanic and Igneous Plumbing Systems: Understanding Magma Transport, Storage, and Evolution in the Earth's Crust synthesizes research from various geoscience disciplines to examine volcanic and igneous plumbing systems (VIPS) in-depth. VIPS comprise a network of magma transport and storage features in the Earth's crust. These features include dykes, sills and larger magma bodies that form the pathway and supply system of magma beneath active volcanoes. Combining basic principles with world-class research and informative illustrations, this unique reference presents a holistic view of each topic covered, including magma transport, magma chambers, tectonics and volcanism. Addressing a variety of approaches to these topics, this book offers researchers and academics in the Earth Science fields, such as geophysics, volcanology and igneous petrology the information they need to apply the information to their own disciplines. - Provides an easily understandable overview of current research on volcanic and igneous plumbing systems - Includes full color illustrations to increase understanding - Covers fundamental information needed to optimize comprehension - Features a field example from world-class research in each chapter, including photographs and maps

Granulites and Crustal Evolution

Author : D. Vielzeuf
Publisher : Springer Science & Business Media
ISBN 13 : 9400920555
Total Pages : 587 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Granulites and Crustal Evolution by : D. Vielzeuf

Download or read book Granulites and Crustal Evolution written by D. Vielzeuf and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop on Petrology and Geochemistry of Granulites, Clermont-Ferrand, France, September 5-9, 1988

Granite Genesis: In-Situ Melting and Crustal Evolution

Author : Guo-Neng Chen
Publisher : Springer Science & Business Media
ISBN 13 : 1402058918
Total Pages : 285 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Granite Genesis: In-Situ Melting and Crustal Evolution by : Guo-Neng Chen

Download or read book Granite Genesis: In-Situ Melting and Crustal Evolution written by Guo-Neng Chen and published by Springer Science & Business Media. This book was released on 2007-06-26 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews current ideas explaining the formation of granite in terms of melting, segregation, ascent and emplacement. It introduces an alternative hypothesis that granites are endogenic in that they essentially form and remain at melting sites in the middle–upper crust under conditions of abnormally high heat flow. The book highlights results of Chinese research over the last 30 years in English for the first time.

Petrogenesis of Metamorphic Rocks

Author : Kurt Bucher
Publisher : Springer Science & Business Media
ISBN 13 : 3662030004
Total Pages : 298 pages
Book Rating : 4.6/5 (62 download)

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Book Synopsis Petrogenesis of Metamorphic Rocks by : Kurt Bucher

Download or read book Petrogenesis of Metamorphic Rocks written by Kurt Bucher and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metamorphic rocks are one of the three classes of rocks. Seen on a global scale they constitute the dominant material of the Earth. The understanding of the petrogenesis and significance of metamorphic of geological education. rocks is, therefore, a fundamental topic There are, of course, many different possible ways to lecture on this theme. This book addresses rock metamorphism from a relatively pragmatic view point. It has been written for the senior undergrad uate or graduate student who needs practical knowledge of how to interpret various groups of minerals found in metamorphic rocks. The book is also of interest for the non-specialist and non-petrolo gist professional who is interested in learning more about the geolo gical messages that metamorphic mineral assemblages are sending, as well as pressure and temperature conditions of formation. The book is organized into two parts. The first part introduces the different types of metamorphism, defines some names, terms and graphs used to describe metamorphic rocks, and discusses principal aspects of metamorphic processes. Part I introduces the causes of metamorphism on various scales in time and space, and some principles of chemical reactions in rocks that accompany metamorphism, but without treating these principles in detail, and presenting the thermodynamic basis for quantitative analysis of reactions and their equilibria in metamorphism. Part I also presents concepts of metamorphic grade or intensity of metamorphism, such as the metamorphic-facies concept.

Periodico di Mineralogia Vol. 84, 3B (Special Issue), December, 2015

Author : Eugenio Fazio
Publisher : Edizioni Nuova Cultura
ISBN 13 : 8868125935
Total Pages : 250 pages
Book Rating : 4.8/5 (681 download)

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Book Synopsis Periodico di Mineralogia Vol. 84, 3B (Special Issue), December, 2015 by : Eugenio Fazio

Download or read book Periodico di Mineralogia Vol. 84, 3B (Special Issue), December, 2015 written by Eugenio Fazio and published by Edizioni Nuova Cultura. This book was released on 2016-02-04 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONTENTS Omar Bartoli, Antonio Acosta-Vigil and Bernardo Cesare High-temperature metamorphism and crustal melting: working with melt inclusions Igor M. Villa 39Ar-40Ar geochronology of mono- and polymetamorphic basements Antonio Langone and Massimo Tiepolo U-Th-Pb “multi-phase” approach to the study of crystalline basement: application to the northernmost sector of the Ivrea-Verbano Zone (Alps) Gabriele Cruciani, Chiara Montomoli, Rodolfo Carosi, Marcello Franceschelli and Mariano Puxeddu Continental collision from two perspectives: a review of Variscan metamorphism and deformation in northern Sardinia Rosolino Cirrincione, Eugenio Fazio, Patrizia Fiannacca, Gaetano Ortolano, Antonino Pezzino and Rosalda Punturo The Calabria-Peloritani Orogen, a composite terrane in Central Mediterranean; its overall architecture and geodynamic significance for a pre-Alpine scenario around the Tethyan basin Gisella Rebay, Maria Pia Riccardi and Maria Iole Spalla Fluid rock interactions as recorded by Cl-rich amphiboles from continental and oceanic crust of italian orogenic belts Guido Gosso, Gisella Rebay, Manuel Roda, Maria Iole Spalla, Massimo Tarallo, Davide Zanoni and Michele Zucali Taking advantage of petrostructural heterogeneities in subduction-collisional orogens, and effect on the scale of analysis

Proterozoic East Gondwana

Author : Masaru Yoshida
Publisher : Geological Society of London
ISBN 13 : 9781862391253
Total Pages : 486 pages
Book Rating : 4.3/5 (912 download)

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Book Synopsis Proterozoic East Gondwana by : Masaru Yoshida

Download or read book Proterozoic East Gondwana written by Masaru Yoshida and published by Geological Society of London. This book was released on 2003 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on Late Mesoproterozoic to early Cambrian events related to Gondwana assembly and break up. The nineteen papers provide a comprehensive review including advanced knowledge and new data from all critical areas of East Gondwana. The recent knowledge of the evolution of East Gondwana, which was regarded as an integral part of the Mesoproterozoic supercontinent Rodinia, is the major theme of the volume, which is reinforced by highlighting this radical and new understanding of the evolution of this region.

Encyclopedia of Geology

Author :
Publisher : Academic Press
ISBN 13 : 0081029098
Total Pages : 5634 pages
Book Rating : 4.0/5 (81 download)

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Book Synopsis Encyclopedia of Geology by :

Download or read book Encyclopedia of Geology written by and published by Academic Press. This book was released on 2020-12-16 with total page 5634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of Geology, Second Edition presents in six volumes state-of-the-art reviews on the various aspects of geologic research, all of which have moved on considerably since the writing of the first edition. New areas of discussion include extinctions, origins of life, plate tectonics and its influence on faunal provinces, new types of mineral and hydrocarbon deposits, new methods of dating rocks, and geological processes. Users will find this to be a fundamental resource for teachers and students of geology, as well as researchers and non-geology professionals seeking up-to-date reviews of geologic research. Provides a comprehensive and accessible one-stop shop for information on the subject of geology, explaining methodologies and technical jargon used in the field Highlights connections between geology and other physical and biological sciences, tackling research problems that span multiple fields Fills a critical gap of information in a field that has seen significant progress in past years Presents an ideal reference for a wide range of scientists in earth and environmental areas of study

Archean Crustal Evolution

Author : K.C. Condie
Publisher : Elsevier
ISBN 13 : 0080869106
Total Pages : 543 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Archean Crustal Evolution by : K.C. Condie

Download or read book Archean Crustal Evolution written by K.C. Condie and published by Elsevier. This book was released on 1994-11-11 with total page 543 pages. Available in PDF, EPUB and Kindle. Book excerpt: The integration of Tectonics/Geochemistry, up-to-date reviews by leading scientists as well as a broad topical coverage of the Archean, are some of the features of this particular volume. As geochronology has progressed in the last 20 years, the Archean has continued to attract interest. Advancements in the understanding of Archean crustal and mantle evolution have progressed rapidly since the first International Archean Symposium in Western Australia (1970). The landmark for the Archean was the NATO Advanced Study Institute at Leicester (1975). At this meeting the Archean truly "came of age". Investigators from many different disciplines focused their expertise on the early history of the earth. For the first time, the nature of the atmosphere, oceans, and life during the Archean was an important part of an Archean symposium. During the most recent Archean Symposium in Perth in 1990, there was a shift in interest from field and trace element data to the new rapidly evolving high-precision U/Pb geochronology of Archean rocks and to detailed structural studies of both low and high grade Archean terrains. The terrane concept so widely applied to the Phanerozoic was proposed for the Archean Yilgarn Province in Western Australia and is now widely accepted for the Archean (as evident by the articles in this book). Plate tectonics is now widely accepted as the principal process that controls the history of continents and oceans. There are, though, well substantiated differences between Archean and post-Archean rocks that indicate that Archean tectonic regimes must have differed in some respects from modern ones. The question of how and to what degree did Archean plate tectonics differ from modern plate tectonics is treated in many of the chapters of this book. Altogether, the editor has presented a selection of articles that provide a fascinating insight into the latest observations in this field.

Evolution and Differentiation of the Continental Crust

Author : Michael Brown
Publisher : Cambridge University Press
ISBN 13 : 0521782376
Total Pages : 550 pages
Book Rating : 4.5/5 (217 download)

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Book Synopsis Evolution and Differentiation of the Continental Crust by : Michael Brown

Download or read book Evolution and Differentiation of the Continental Crust written by Michael Brown and published by Cambridge University Press. This book was released on 2006-02-27 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary of recent research covering experimental methods and numerical modelling, for graduate students and researchers.

Fifth Hutton Symposium

Author : Shuns? Ishihara
Publisher : Geological Society of America
ISBN 13 : 0813723892
Total Pages : 391 pages
Book Rating : 4.8/5 (137 download)

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Book Synopsis Fifth Hutton Symposium by : Shuns? Ishihara

Download or read book Fifth Hutton Symposium written by Shuns? Ishihara and published by Geological Society of America. This book was released on 2005-01-01 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Proterozoic Crustal Evolution

Author : K.C. Condie
Publisher : Elsevier
ISBN 13 : 0080869092
Total Pages : 553 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis Proterozoic Crustal Evolution by : K.C. Condie

Download or read book Proterozoic Crustal Evolution written by K.C. Condie and published by Elsevier. This book was released on 1993-02-03 with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a final product of the International Geological Correlation Program (IGCP) Project 217, this volume brings together significant advances in the understanding of Proterozoic crustal evolution. This IGCP Project focussed on nine research objectives: 1) Comparison of Archean and Proterozoic supracrustal assemblages to more fully understand differences between Archean and post-Archean tectonic regimes; 2) To more fully understand the geochemical differences between Archean and post-Archean sediments and to evaluate the various factors that control sediment composition; 3) From combined U/Pb zircon and whole-rock Sm/Nd studies, to see if the apparent 2.4-2.0 continental crust "generation gap" is real; 4) To employ new techniques in the dating of individual zircons to more fully understand Proterozoic tectonic history and the role of crustal reworking; 5) From trace element ratios and Nd isotopic data from basalts, to better understand Proterozoic mantle evolution; 6) To encourage more detailed studies of the anorogenic granite-anorthosite association to better understand its origin and significance in terms of crustal evolution; 7) From combined Nd, Pb, and Sr isotopic data, to more precisely estimate the amount of new continental crust formed during the Proterozoic; 8) To encourage joint P-T and geochronological studies of Proterozoic and high-grade terranes to better understand Proterozoic orogenesis: and 9) To try and understand why hydrothermal precious metal deposits are relatively rare in the Proterozoic compared to both the Archean and the Phanerozoic. The book should be of interest to professionals in the geosciences (especially geochemists, petrologists and structural geologists) and graduate students in the same fields.