Download or read book Evolution of the Ethiopian Volcanic Province written by Bruno Zanettin and published by . This book was released on 1992 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Afar Volcanic Province Within the East African Rift System written by G. Yirgu and published by Geological Society of London. This book was released on 2006 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seismically and volcanically active East African Rift System is an ideal laboratory for continental break-up processes: it encompasses all stages of rift development. Its northernmost sectors within the Afar volcanic province include failed rifts, nascent sea-floor spreading, and youthful passive continental margins associated with one or more mantle plumes. A number of models have been proposed to explain the success and failure of continental rift zones, but there remains no consensus on how strain localizes to achieve rupture of initially 125-250 km-thick plates, or on the interaction between the plates and asthenospheric processes. This collection of papers provides new structural, stratigraphic, geochemical and geophysical data and numerical models needed to resolve fundamental questions concerning continental break-up and mantle plume processes. The focus is on how mantle melt intrudes and is distributed through the plate, and how this magma intrusion process controls along-axis segmentation and facilitates break-up.
Download or read book Volcanism and Evolution of the African Lithosphere written by Luigi Beccaluva and published by Geological Society of America. This book was released on 2011-01-01 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Formation and Evolution of Africa written by Douwe J. J. van Hinsbergen and published by Geological Society of London. This book was released on 2011 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The African continent preserves a long geological record that covers almost 75% of Earth's history. The Pan-African orogeny (c. 600-500 Ma) brought together old continental kernels (West Africa, Congo, Kalahari and Tanzania) to form Gondwana and subsequently the supercontinent Pangaea by the late Palaeozoic. The break-up of Pangaea since the Jurassic and Cretaceous, primarily through opening of the Central Atlantic, Indian, and South Atlantic oceans, in combination with the complicated subduction history to the north, gradually shaped the African continent. This volume contains 18 contributions that discuss the geology of Africa from the Archaean to the present day.
Download or read book Dynamic Magma Evolution written by Francesco Vetere and published by John Wiley & Sons. This book was released on 2021-01-07 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explores the complex physico-chemical processes involved in active volcanism and dynamic magmatism Understanding the magmatic processes responsible for the chemical and textural signatures of volcanic products and igneous rocks is crucial for monitoring, forecasting, and mitigating the impacts of volcanic activity. Dynamic Magma Evolution is a compilation of recent geochemical, petrological, physical, and thermodynamic studies. It combines field research, experimental results, theoretical approaches, unconventional and novel techniques, and computational modeling to present the latest developments in the field. Volume highlights include: Crystallization and degassing processes in magmatic environments Bubble and mineral nucleation and growth induced by cooling and decompression Kinetic processes during magma ascent to the surface Magma mixing, mingling, and recharge dynamics Geo-speedometer measurement of volcanic events Changes in magma rheology induced by mineral and volatile content The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Download or read book Landscapes and Landforms of Ethiopia written by Paolo Billi and published by Springer. This book was released on 2015-03-23 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a succinct but comprehensive presentation of key geomorphological locations and topics including information about geomorphological heritage and maps to visit the most important sites. Apart from often being remarkably scenic, landscapes reveal stories that often can be traced back in time tens of million years and include unique events. This is particularly true for Ethiopia where spectacular examples of different landforms are present. Its geomorphology varies from highlands, marked by high volcanoes and incised by deep river gorges, to the rift valley lakes endorheic systems and the below sea level lowlands with characteristic landscapes which are unique in the world. Landscapes and Landforms of Ethiopia highlights all these topics including essential information about geology and tectonic framework, past and present climate, hydrology, geographical regions and long-term geomorphological history. It is a highly informative book, providing insight for readers with an interest in geography and geomorphology.
Download or read book Physical Volcanology written by L. Civetta and published by Elsevier. This book was released on 1974-01-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical Volcanology
Download or read book Continental Flood Basalts written by J. D. Macdougall and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Dictionary of Ethiopia written by Thomas P. Ofcansky and published by Scarecrow Press. This book was released on 2004-03-29 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ethiopia is one of the world's oldest countries; its Rift Valley may be the location where the ancestors of humankind originated more than four million years ago. With a population of 67 million people today, it is the third most populous country on the African continent after Nigeria and Egypt. It is the source of 86 percent of the water reaching the Aswan Dam in Egypt, most of it carried by the amazing Blue Nile. Ethiopia offers major historical sites such as the pre-Christian palace at Yeha, the stele and tombs of the old Kingdom of Axum, and the rock-carved churches of Lalibela. For anyone interested in Ethiopia, this historical dictionary, through its individual and carefully cross-referenced entries, captures the importance and intrigue of this truly significant African nation. Historical Dictionary of Ethiopia appeals to all levels of readers, providing entries for each of Ethiopia's 85 ethnic groups and covering a broad range of cultural, political, and economic topics. Readers interested in the cultural aspects or who are planning to visit Ethiopia will find a wealth of entries on art, literature, handicrafts, music, dance, bird life, geography, and historic tourist sites. Practitioners in government and non-governmental organizations will find entries on pressing economic, social, and political issues such as HIV/AIDS, female circumcision , debt, human rights, and the environment. The important historical role of missionaries and the combination of conflict and cooperation between Christians and Muslims in the region are also issues reviewed. And, finally, many of the entries highlight relations between Ethiopia and her neighbors-Eritrea, Somalia, Somaliland, Djibouti, Kenya, and Sudan. In the bibliography, considerable emphasis has been placed on including both new and old materials covering all facets of Ethiopia, organized for easy identification by areas of major interest.
Download or read book Historical Dictionary of Ethiopia written by David H. Shinn and published by Scarecrow Press. This book was released on 2013-04-11 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ethiopia is clearly one of the most important countries in Africa. First of all, with about 75 million people, it is the third most populous country in Africa. Second, it is very strategically located, in the Horn of Africa and bordering Eritrea, Sudan, Kenya, and Somalia, with some of whom it has touchy and sometimes worse relations. Yet, its capital – Addis Ababa – is the headquarters of the African Union, the prime meeting place for Africa’s leaders. So, if things went poorly in Ethiopia, this would not be good for Africa, and for a long time this was the case, with internal disruption rife, until it was literally suppressed under the strong rule of the recently deceased Meles Zenawi. The Historical Dictionary of Ethiopia, Second Edition covers the history of Ethiopia through a chronology, an introductory essay, appendixes, and an extensive bibliography. The dictionary section has several hundred cross-referenced entries on important personalities, politics, economy, foreign relations, religion, and culture. This book is an excellent access point for students, researchers, and anyone wanting to know more about Ethiopia.
Download or read book Extreme Natural Hazards Disaster Risks and Societal Implications written by Alik Ismail-Zadeh and published by Cambridge University Press. This book was released on 2014-04-17 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique interdisciplinary approach to disaster risk research, including global hazards and case-studies, for researchers, graduate students and professionals.
Download or read book Rock Mechanics and Rock Engineering From the Past to the Future written by Reşat Ulusay and published by CRC Press. This book was released on 2016-11-18 with total page 1371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Mechanics and Rock Engineering: From the Past to the Future contains the contributions presented at EUROCK2016, the 2016 International Symposium of the International Society for Rock Mechanics (ISRM 2016, Ürgüp, Cappadocia Region, Turkey, 29-31 August 2016). The contributions cover almost all aspects of rock mechanics and rock engineering from theories to engineering practices, emphasizing the future direction of rock engineering technologies. The 204 accepted papers and eight keynote papers, are grouped into several main sections: - Fundamental rock mechanics - Rock properties and experimental rock mechanics - Analytical and numerical methods in rock engineering - Stability of slopes in civil and mining engineering - Design methodologies and analysis - Rock dynamics, rock mechanics and rock engineering at historical sites and monuments - Underground excavations in civil and mining engineering - Coupled processes in rock mass for underground storage and waste disposal - Rock mass characterization - Petroleum geomechanics - Carbon dioxide sequestration - Instrumentation-monitoring in rock engineering and back analysis - Risk management, and - the 2016 Rocha Medal Lecture and the 2016 Franklin Lecture Rock Mechanics and Rock Engineering: From the Past to the Future will be of interest to researchers and professionals involved in the various branches of rock mechanics and rock engineering. EUROCK 2016, organized by the Turkish National Society for Rock Mechanics, is a continuation of the successful series of ISRM symposia in Europe, which began in 1992 in Chester, UK.
Download or read book Groundwater in Ethiopia written by Seifu Kebede and published by Springer Science & Business Media. This book was released on 2012-08-01 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive description of groundwater resources in Ethiopia and its various dimensions (groundwater as resource, environmental functions, and socioeconomics). The prevailing knowledge of groundwater resources in Ethiopia (or elsewhere in Sub Saharan Africa) was based on geological and stratigraphic framework known nearly four decades ago (mainly 1960's and 70's). Thanks to the substantial geoscientific research since the 70's a new set of relevant geological/stratigrahpic data has been created that helps to re-define our understanding of groundwater resources in Africa as a whole and in Ethiopia in particular: a) For the first time the basement aquifer of Ethiopia has been described hydrogeologically based on genesis of regoliths (deep weathering and striping history); clear regional difference in groundwater potential is shown for the first time; comparative accounty has been given regarding groundwater occurrence in the generally low grade basement rocks of Ethiopia (Arabian Nubian shield) and high grade basement rocks of the rest of Africa. b) For the first time groundwater occurrence in multilayred sedimentary rocks account for spatial variation in degree of karstification; deformation history, and stratigraphy. c) The vast volcanic aquifers of Ethiopia which have previously classified based on their ages are now reclassified based on age, morphology (eg. groundwater in plateau volcanics, groundwater in shield volcanics) and aquifer structure. d) The loose alluvio lacustrine sediments which were known as least extensive in previous works based on areal cover are in fact shown to host the most voluminous groundwater resources in Ethiopia. These aquifers have now been described based on their geomorphology, extent, and genesis. The aim of this book is to use these newly created knowledge to redefine the understanding of groundwater resources in Ethiopia.
Download or read book Geology of Afar East Africa written by Jacques Varet and published by Springer. This book was released on 2017-11-14 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the geological knowledge accumulated on Afar in the last 60 years, demonstrating that it is, and will remain, a real “hot spot” for geological and geophysical research. It provides insights into the Earth processes along diverging plate boundaries, the study of both the continental and oceanic lithosphere and underlying asthenosphere, and margins and transitions including magmatic, volcanic, tectonic, sedimentary, hydrothermal and geodynamic processes. The Afar triangle is a geological depression that developed where the Gulf of Aden, Red Sea and East African Rift Valley meet. It is considered to be one of the Earth system’s most important mantle plumes. In 1967, when the first expedition was organized, there was little information on the geology of the area, and even geographic base maps were lacking. However, the first satellite photographs from the Apollo and Gemini space missions offered a complete picture of the Red Sea-Gulf of Aden region, providing a new vision of the Afar triangle. The book describes the unique geological features that make Afar the only place in the world where an oceanic plate boundary with all its successive steps of development can be observed in the open air. It also presents the Afar triangle as one of the cradles of first, now extinct hominids. The Middle Awash area contains sites of several fossil discoveries, such as the well-known Lucy. The hydrothermal processes in Afar provide conditions suitable for the study of the most primitive forms of life (archaebacterial) and it is also one of the few places where significant quantities of telluric energy are available at the surface for geothermal development. Further, the area has economically interesting mineral deposits and illustrates a number of current climate change issues. In addition to providing geological information, the book shows that Afar is an area where an individual human population developed with its own language and culture, and which adapted to the rugged landscape and extremely dry and hot climate. It is a valuable resource for scientists and students, and also serves the needs of the Afar nation, currently split in three different countries as a result of recent historical events.
Download or read book Large Igneous Provinces and their Plumbing Systems written by R. K. Srivastava and published by Geological Society of London. This book was released on 2022-03-15 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: Identification of large-volume, short-duration mafic magmatic events of intraplate affinity in both continental and oceanic settings on the Earth and other planets provides invaluable clues for understanding several vital geological issues of current concern. Of particular importance is understanding the assembly and dispersal of supercontinents through Earth’s history, dramatic climate change events including mass extinctions, and processes that have produced a wide range of large igneous province (LIP)-related resources, such as Ni–Cu–PGE, Au, U, base metals and petroleum. This volume comprises 21 contributions on the latest developments and new information on LIPs and their plumbing systems and presents methodical studies on different components of LIP plumbing systems. These articles are especially helpful in understanding continental break-up events, regional domal uplift and a variety of metallogenic systems, as well as the temporal and spatial distribution of LIPs, their origin and their likely links to mantle plumes/superplumes.
Download or read book Progress in Volcanology written by Angelo Paone and published by BoD – Books on Demand. This book was released on 2022-06-08 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Volcanology includes nine chapters in three sections. The first section is the “Introduction” while the other two sections speak on “Applied Volcanology” and “Volcanic Sedimentology, Geochemistry and Petrology.” The chapters address volcanology in several areas around the world, including Italy, Indonesia, Ethiopia, Argentina, India, and others.
Download or read book Volcanic Rifted Margins written by Martin A. Menzies and published by Geological Society of America. This book was released on 2002 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
