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Geomorphological Approaches to the Study of Neotectonics
Journal of the Geological Society, London, Vol. 143, 1986, pp. 335-342, 4 figs, 4 tables. Printed in Northern Ireland Geomorphological approaches to the study of neotectonics J. C. DOORNKAMP Department of Geography, The University, Nottingham NG7 2RD, UK Abstract: The study of morphotectonics is concerned with the analysis of landforms whose form or origins have been affected by neotectonic activity. Traditional morphotectonic studies have been used as a basis for more refined (e.g. statistical) analyses. After the 1960s, however, there emerged new techniques and new approaches to the study of morphotectonics. These have made more precise not only the recognition of morphotectonic features, but have also improved their dating. The time has come to integrate morphotectonic studies more fully both with the approaches used by other disciplines and with modern geomorphological theory. Neotectonics is frequently associated with morphotectonics, traditional period but which pursued more subtle and more which is concerned with the geomorphology of landforms elusive data, and used more refined analytical techniques. whose character is related to recent tectonics. Morphotec- Typical of these were the studies in Uganda where the early tonics can be sub-divided into two parts. One part centres models of rift valley formationand drainage reversal (to on structural activity resulting from isostatic adjustment formLake Victoria) defined by Wayland (1929, 1934a,b) since the Quaternary, and the other is more concerned with were elaborated by Doornkamp & Temple (1966). neotectonics which is not itself responsea to post- Statistical analysis of the warped rift valley shoulders Pleistoceneisostatic effects. Thisaccount is restricted to (Doornkamp 1972) revealed zones of warping much more neotectonics; topics relating to isostatic effects are discussed precisely than had hitherto been the case. -
Study of Morphotectonics and Hydrogeology for Groundwater
STUDY OF MORPHOTECTONICS AND HYDROGEOLOGY FOR GROUNDWATER PROSPECTING USING REMOTE SENSING AND GIS IN THE NORTH WEST HIMALAYA, DISTRICT SIRMOUR, HIMACHAL PRADESH, INDIA Thapa, R1, Kumar Ravindra2and Sood, R.K1 1Remote Sensing Centre, Science Technology & Environment, 34-SDA Complex, Kasumpti, Shimla, Himachal Pradesh, India 171 009 India - [email protected], [email protected] 2Centre of Advanced Study in Geology,Panjab University Chandigarh,160 014 India - [email protected]. KEY WORDS: Satellite Imageries, Neo-Tectonics,GPS, Hydrogeology, Morphometric Analysis, Weightage, GIS, Ground Water Potential. ABSTRACT: The study of aerial photographs, satellite images topographic maps supported by ground truth survey reveals that the study area has a network of interlinked subsurface fractures. The features of neo-tectonic activities in the form of faults and lineaments has a definite control on the alignment of many rivers and their tributaries. Geology and Morphotectonics describes the regional geology and its correlation with major and minor geological structures. The study of slopes, aspects, drainage network represents the hydrogeology and helps in categorization of the land forms into different hydro-geomorphological classes representing the relationship of the geological structures vis-à-vis the ground water occurrence. Data integration and ground water potential describes the designing of data base for ground water analysis in GIS platform and the use of hydro-geomorphological models based on satellite imageries -
Municipalidad De Abangares, Guanacaste Nombre: Mejoramiento
Fichas socio-ambientales de los proyectos de la Muestra Municipalidad de Abangares, Guanacaste Nombre: Mejoramiento de Camino Vecinal C5-07-010-00(Ent.C.09) San Rafael (Ent.N.606) Cañitas, Cantón de Abangares, Guanacaste Longitud y costo: 5+650Km; ₡678, 438,647.07 Localización: Distrito de La Sierra. Coordenadas geográficas: FINAL: E407082,702 N1142483,323 INICIO: E403897,836 N1143884,824 Condición Actual: Presenta una superficie de ruedo con lastre en mal estado, de un ancho de calzada variable y un sistema de drenaje escaso y deficiente. El flujo vehicular consta en su mayoría de automóviles (55.07%), Buses (14.49%), carga liviana (20.29%) y camiones de 2 ejes (10.14%), para un tránsito promedio diario (TPD) estimado de 230. Comunica los poblados de San Rafael y Cañitas y sirve como conector para el sector turístico de Monteverde, acortando la distancia entre éstos. Entre las actividades que se desarrollan en estas comunidades, se encuentra la agricultura (siembra de naranja) y la ganadería a mediana escala. Condición con Proyecto: Drenaje habilitado en la totalidad, una superficie de ruedo relastrada con una capa granular de rodadura TM40b con un espesor de 15 centímetros una vez compactado y como acabado final colocar un sello asfáltico contra erosión que ayude a aumentar la vida útil de la superficie de ruedo. El total de beneficiarios directos se estima en 1.223 personas y los beneficiarios indirectos son 1.412 personas para un total de 2.635 personas, lo anterior interpretando los el Censo del 2011 del Instituto Nacional de Estadísticas Actividades a realizar: Excavación y colocación de drenajes y obras de arte; colocación de gaviones; reacondicionamiento de subrasante y espaldones; construcción de cunetas; capa granular de rodadura; sello asfáltico, señalización vertical. -
Mesa De Trabajo Por Guanacaste Para La Mejora De La Calidad De Vida, El Desarrollo Productivo E Infraestructura Y La Promoción Del Empleo
Mesa de Trabajo por Guanacaste para la Mejora de la Calidad de Vida, el Desarrollo Productivo e infraestructura y la Promoción del Empleo Grupo 1. Agua e Infraestructura Hídrica 2 de octubre 2015 Universidad Nacional de Costa Rica Nicoya La Mesa de Agua e Infraestructura Hidríca para Guanacaste, se conformó el pasado 2 de octubre con la participación de instituciones públicas como el MINAE- AyA, MAG, INDER, SENARA, SINAC, DINA, UNA, CNE, además de la presencia de tres diputados de la provincia, Surray Carrillo por el FA, Marta Arauz y Juan Marín de PLN, también se tuvo presencia de la Sociedad Civil como ASADAS, CATURGA, FEMUGA, Cámara de Ganaderos de Guanacaste, COMUN, Municipalidades como Bagaces. Una de las sugerencias importantes es la participación de otros actores de la región chorotega que han estado pendientes del proceso, también sería importante una nueva reunión para ver el proceso de seguimiento de acuerdo a los compromisos adquiridos. Se definen las prioridades de la mesa, las colaboraciones y responsables, también se hace un listado de obstáculos con la intención de acelerar los procesos para atender el decreto y la emergencia de sequía. I. Prioridades 1. Se estableció la priorización de las Comunidades con problemas de agua de forma crítica en categoría roja, para ello se identifican según la CNE 125 comunidades con problemas de abastecimiento de agua potable. Se ha tomado acciones como la colocación de tanques de almacenamiento en centros escolares y comunidades con agua escasa, colocado tanques de almacenamiento, agua en camiones cisternas, sin embargo cada semana aparecen nuevas comunidades con problemas de agua a medida que aumenta la sequía se perfila mayores problemas de faltante de agua. -
Mechanical Modelling of Oblique Convergence in the Zagros, Iran
Geophys. J. Int. (2006) 165, 991–1002 doi: 10.1111/j.1365-246X.2006.02900.x Mechanical modelling of oblique convergence in the Zagros, Iran ∗ Philippe Vernant and Jean Ch´ery Laboratoire Dynamique de la Lithosph`ere, CNRS-Universit´e de Montpellier II, CC 060, place E. Bataillon, 34095 Montpellier Cedex 05, France. E-mail: [email protected] 2.fr Accepted 2006 January 7. Received 2005 October 28; in original form 2005 October 28 SUMMARY Recent GPS surveys indicate that the Zagros kinematics corresponds to an oblique convergence between a rigid central Iranian plateau and the Arabian plate at ∼7mmyr−1 at the longitude of the Persian Gulf. Convergence is almost frontal in the SE Zagros and oblique (45◦)inthe NW part of the range. It has been proposed that internal deformation of the NW Zagros occurs in a partitioned mode. In such a view, the Main Recent Fault (MRF) bordering the Iranian plateau accommodates all the tangential motion, while shortening happens by pure thrusting within the fold and thrust belt as suggested by the focal mechanisms within the range. We use a 2.5-D mechanical finite element model of the Zagros to understand the influence on the Zagros deformation of (1) the obliquity of convergence, (2) the rheological layering of the lithosphere (strong upper crust, weak lower crust, strong or weak uppermost mantle) and (3) a possible weakness of the MRF. Surprisingly, a fully partitioned mode occurs only when the collision is very oblique. In the case of the NW Zagros, we find that the MRF can accommodate only ∼25 per cent of the whole tangential motion. -
Costa Rica) Geologica Acta: an International Earth Science Journal, Vol
Geologica Acta: an international earth science journal ISSN: 1695-6133 [email protected] Universitat de Barcelona España Denyer, P.; Baumgartner, P.O. Emplacement of Jurassic-Lower Cretaceous radiolarites of the Nicoya Complex (Costa Rica) Geologica Acta: an international earth science journal, vol. 4, núm. 1-2, 2006, pp. 203-218 Universitat de Barcelona Barcelona, España Available in: http://www.redalyc.org/articulo.oa?id=50540212 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Geologica Acta, Vol.4, Nº1-2, 2006, 203-218 Available online at www.geologica-acta.com Emplacement of Jurassic-Lower Cretaceous radiolarites of the Nicoya Complex (Costa Rica) 1 2 P. DENYER and P.O. BAUMGARTNER 1 Escuela Centroamericana de Geología, Universidad de Costa Rica P.O. Box 214-2060, San José Costa Rica. E-mail: [email protected] 2 Institut de Géologie et Paléontologie, Université de Lausanne BFSH2-1015 Lausanne, Switzerland. E-mail: [email protected] ABSTRACT We present a new model to explain the origin, emplacement and stratigraphy of the Nicoya Complex in the NW part of the Nicoya Peninsula (Costa Rica) based on twenty-five years of field work, accompanied with the evo- lution of geochemical, vulcanological, petrological, sedimentological and paleontological paradigms. The igneous-sedimentary relation, together with radiolarian biochronology of the NW-Nicoya Peninsula is re-exa- mined. We interpret the Nicoya Complex as a cross-section of a fragment of the Late Cretaceous Caribbean Plateau, in which the deepest levels are exposed in the NW-Nicoya Peninsula. -
Geological Sciences Department Annual Report 2018-19
Geological Sciences Department Annual Report 2018-19 I. Student Success: Fall 2019 Cohort and Progress on Graduation Initiative 2025 Instructions to Department Cal Poly Pomona is committed to making evidenced-based decisions in support of our students’ success. The CPP Tableau Dashboards (http://www.cpp.edu/~irpa/dashboards/index.shtml) and CSU Student Success Dashboards (https://csusuccess.dashboards.calstate.edu/public/app/dashboard/dashboard-index.php) are tools to analyze our progress, foster cultures of inquiry, and help us identify and pursue those changes with the greatest potential to benefit our students. Using these tools, reflect on and summarize the Department’s efforts in AY 2018-19 to increase the retention and graduation rates of students, including efforts to close equity gaps for Pell-eligible and underrepresented minority students (URM). More specifically, focus on the following strategies, which were strategic priorities this year in alignment with the CSU Graduation Initiative. 1. Progress on improving graduation and retention rates (both freshman and transfer). • Where do you see the most significant challenge and the most improvement? What accounts for the progress and what strategies did you employ this year? Transfer graduation rates in Geology show an upward trend over the past 4 years. The 2-year rate exceeds the CSU goal, and the 4-year rate is approaching the goal. We attribute these positive results to concerted Department efforts to better advise students, and generally good preparation of students entering the major, with an intention of staying in Geology. Historically, our transfer cohort is larger than the freshman cohort, because Earth Science is rarely taught in local high schools First time freshmen graduation rates show an upward trajectory that currently exceeds the goal for 6-year graduation. -
Us Department of the Interior
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY COSTA RICA VOLCANO PROFILE by Cynthia M. Stine1 Norman G. Banks1 Open-File Report 91-591 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (or with the North American Stratigraphic code). Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. *U.S. Geological Survey David A. Johnston Cascades Volcano Observatory 5400 MacArthur Blvd. Vancouver, WA. 98661 TABLE OF CONTENTS Introduction.......................................................^ Background......................................................... Tectonic setting..................................................................................................................................................5 General description of volcanic hazards.......................................................................................................5 TephrafaU...........................................^ Pyroclastic flows and surges..............................................................................................................6 Mudflows...............................................................................................................................................6 Lava flows..............................................................................................................................................6 Debris avalanches................................................................................................................................? -
“Marimba Por Tí Me Muero”: Region and Nation in Costa Rica, 1824-1939
“MARIMBA POR TÍ ME MUERO”: REGION AND NATION IN COSTA RICA, 1824-1939 by Soili Iiris Buska Submitted to the faculty of the University Graduate School in partial fulfillment of the requirements for the degree Doctor of Philosophy in the Department of History Indiana University March 2006 Accepted by the Graduate Faculty, Indiana University, in partial fulfillment of the requirements for the degree of Doctor of Philosophy. ______________________________________ Jeffrey L. Gould, Ph.D., Chairperson ______________________________________ Peter Guardino, Ph.D. Doctoral Committee _______________________________________ Daniel James, Ph.D. ______________________________________ Víctor Hugo Acuña Ortega, Ph.D. December 16, 2005 ii © (2005) Soili Iiris Buska ALL RIGHTS RESERVED iii Acknowledgements Many people and institutions made this dissertation possible. The Department of History of Indiana University provided me with financial support and graduate appointments from the start of my studies in Bloomington. The pre-dissertation grant and research fellowship from the Office of International Programs and the University Graduate School of Indiana University respectively helped me to define my project and to begin the research. The Indiana University Bloomington Library staff and the History Department Staff in IU Bloomington were of greatest help. History Department Graduate Secretary Alexia Bock assisted in many ways and gave me crucial practical advice during my stay in Bloomington. The Center for Latin American Studies of the University of Pittsburgh's University Center for International Studies generously opened its doors to me in the summer of 2005. The Escuela de Historia, Centro de Investigaciones Históricas de America Central (CIHAC), and the Oficina de Asuntos Internacionales y Cooperación Externa (OAICE) of the Universidad de Costa Rica have all participated in making possible research and writing of this dissertation. -
Deep Sea Drilling Project Initial Reports Volume 84
37. A TECTONIC CROSS-SECTION OF THE COSTA RICAN PACIFIC LITTORAL AS A KEY TO THE STRUCTURE OF THE LANDWARD SLOPE OF THE MIDDLE AMERICA TRENCH OFF GUATEMALA1 Jacques Azema, Jacques Bourgois, Peter O. Baumgartner, Jean Tournon, Alain Desmet, and Jean Aubouin2 ABSTRACT Pre-upper Senonian basement of Costa Rica crops out in the Santa Elena and Nicoya peninsulas. From south to north and from base to top the basement includes the Esperanza, Matapalo, and Santa Elena units. The Esperanza unit is Albian-Santonian in age and consists mainly of pillow basalt and massive basalt flows. The Matapalo unit includes Callovian-Cenomanian radiolarite and exhibits a massive basalt flow, pillow basalt, and dolerite basement. The Santa Elena unit contains ultramafic and mafic rocks in which harzburgite is the major component. The most important tec- tonic features of the Nicoya Complex are the large Santa Elena and Matapalo nappes. Nappe emplacement was from north to south during late Santonian time. The sedimentary cover of the Nicoya Complex comprises (1) the Campanian El Viejo Formation, which consists of shallow-water sediments to the north on Santa Elena Peninsula and the Campa- nian-Maestrichtian Sabana Grande Formation of deep-water origin to the south on Nicoya Peninsula; (2) Paleocene sediments, which indicate deposition in a deep-water environment and which comprise the Rivas, Las Palmas, and Samara formations; and (3) post-upper Eocene(?) sediments, which consist of the shallow-water Barra Honda and Montezuma formations. Two unconformities are the major geologic features of the upper Senonian-Tertiary sequence of Costa Rica. The lower one is at the base of the Sabana Grande Formation and marks a major change in the geologic conditions (basalt is scarce in the Campanian-Tertiary series); the upper unconformity at the base of the Barra Honda and Montezuma formations is not as pronounced as the lower one. -
FIRE SALE 30 Acres with House and Infrastructure $247,000 ID: 14076 Markerimage Not Found Or Type Nicoyaunknown Peninsula, Guanacaste
FIRE SALE 30 Acres With House And Infrastructure $247,000 ID: 14076 MarkerImage not found or type Nicoyaunknown Peninsula, Guanacaste Property Type: Land • Bedrooms: 3 • Size: 123379 sq m • Built: 1997 • Status: Active/Published • Parking Spaces • Bbq Area • Close To Schools • Close To Shops • Close To Transport • Development Farm • Fully Landscaped • Highway Frontage • Investment Opportunities • Jungle Views • Mountain View • Pets Allowed • Pool • Storage Unit • Valley Views Property Description *FIRE SALE* unbeatable deal.The Guanacaste Tree Resort is a family-owned property and business venture that presents a valuable real estate prospect for someone looking to invest or buy in Costa Rica in a development that has over 20 years of on-the-ground operation and experience. The 30-acre ranch is located south of the village of Pedernal, in the municipality of Nicoya, Costa Rica. Nicoya is a large, but very quaint and picturesque, agricultural town, and is the principal city on the Nicoya peninsula. The town boasts a population of over 15,000 inhabitants, a large and well equipped several hundred bed hospital and clinic and is located about 40 minutes from several coastal beaches. The Guanacaste Tree Resort lies 5 miles outside of Nicoya, on the main highway between the towns of Nicoya and Mansion on the main road to San Jose. For more information about the Nicoya region, visit their informational web site at: www. Additional • ID 14076 • For Sale • $247,000 • Active/Published • Land • 2 Bathrooms • 3 Bedrooms • Parking Spaces : 2 • View : Valley Toll Free: 1-877-272-3747 +506-2787-0223 Image not found or type unknown Plaza Conchal, Tamarindo, Costa Rica. -
EARTH SCIENCES RESEARCH JOURNAL Seismotectonic
EARTH SCIENCES RESEARCH JOURNAL Eart Sci. Res. J. Vol. 19, No. 1 (June, 2015): 7 - 13 SEISMOLOGY Seismotectonic-Geologic Hazards Zoning of Iran Mehran Arian Department of Geology, Science and Research Branch, Islamic Azad University, Tehran, Iran; [email protected] ABSTRACT Key words: Seismotectonic, Hazards, Zoning map, Iran, Seismicity, Earthquake Seismotectonic-geologic hazards zoning map of Iran is drawn based on deterministic seismic hazards evaluation using the seismicity records, structural trends, tectonic settings, fault ruptures and neotectonics activities in Iran. This map has been prepared to indicate the seismotectonic-geologic hazards of Iran. It contains the earthquake hazards parameters such as b value and Mmax for the nineteen seismotectonic provinces. Furthermore, Moho discontinuity depth, seismogenic layer depths and seismic rates for all provinces are investigated. The majority of deformation in Iran has been concentrated in the continental crust of the country. Zagros and Alborz experience deep earthquakes that are an indication of existence of the thick-skinned tectonics. Finally, some provinces such as Piranshahr- Borojen, East Iran, Naien- Rafsanjan and East Alborz, which include main suture zones of Iran, have faced high seismic hazards. RESUMEN Palabras clave: Sismotectónica, amenazas, mapa zonal, Irán, sismicidad, terremoto. Este estudio se realizó con el fin de preparar un mapa zonal de amenazas seismotectónicas y geológicas de Irán con base en la evaluación de amenazas sismícas deterministas a través de los registros sísmicos, las tendencias estructurales, las configuraciones tectónicas, las rupturas de fallas y la actividad neotectónica en Irán. Este mapa contiene los parámetros de amenaza sismológica como los valores b y Mmax para las 19 provincias sismotectónicas del país.