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Contributo alla geologia di Tondo, Mwenga Sud Kivu/DRC

Questo lavoro si occupa dello studio petrografico, cartografico e geochimico del settore o raggruppamento di Tondo. La nostra area di studio è stata interessata dall'orogenesi di Kibariene del gruppo burundese, che è uno dei periodi geologici dell'Africa centrale, caratterizzato da diversi metamorfismi, che hanno interessato l'area di studio. Abbiamo dovuto descrivere una cinquantina di affioramenti lungo il minuto campo e dopo le analisi macroscopiche dei campioni prelevati sul campo e le analisi microscopiche fatte in laboratorio, abbiamo potuto constatare che le rocce affioranti in questi settori sono in gran parte il risultato del metamorfismo regionale che ha interessato queste regioni che fanno parte delle formazioni Kibaian.Scisti, quarziti, gneiss fanno anch'essi parte di queste aree. gli oligoelementi geochimici sono : Co, Cu, Zn, Mo, Sb, Zr, Ni, Cr, V, As, Se, Sr, Ag, Cd, Sn, W, Hg, Pb, Bi, Th, U, Au, Nb e Ta.

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Price: 37.99 EUR excl. shipping

Contribuição para a Geologia do Tondo, Mwenga Kivu Sul/DRC

Este trabalho trata do estudo petrográfico, cartográfico e geoquímico do setor ou agrupamento do Tondo. A nossa área de estudo foi afectada pela orogenia kibariana do grupo burundiano, que é um dos períodos geológicos da África Central, caracterizado por vários metamorfismos, que afectaram a área de estudo. Assim, descrevemos afloramentos que em geral compreendem rochas metamórficas. Tivemos que descrever cerca de cinquenta afloramentos ao longo do minuto de campo e após análises macroscópicas das amostras colhidas no campo e análises microscópicas feitas em laboratório, conseguimos descobrir que os afloramentos de rochas nestes sectores são em grande parte o resultado do metamorfismo regional que afectou estas regiões que fazem parte das formações kibaianas.O xisto. Quartzito, Gneiss também fazem parte destas áreas. os oligoelementos geoquímicos são : Co, Cu, Zn, Mo, Sb, Zr, Ni, Cr, V, As, Se, Sr, Ag, Cd, Sn, W, Hg, Pb, Bi, Th, U, Au, Nb e Ta. Ouro e Estanho são os principais minerais disseminados no xisto

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Contribution to the Geology of Tondo, Mwenga South Kivu/DRC

This work deals with the petrographic, cartographic and geochemical study of the Tondo area or grouping. Our study area was affected by the Kibariene orogeny of the Burundian group which is one of the geological periods of Central Africa, characterized by several metamorphisms, which affected the study area. Thus, we have described outcrops that in general comprise metamorphic rocks. We had to describe about fifty outcrops along the field minute and after the macroscopic analysis of the samples taken on the field and the microscopic analysis made in the laboratory, we were able to find that the rocks outcropping in these sectors are largely the result of a regional metamorphism having affected these regions which are part of the Kibaian formations.The Schist. Quartzites, Gneiss are also part of these sectors. geochemical trace elements are : Co, Cu, Zn, Mo, Sb, Zr, Ni, Cr, V, As, Se, Sr, Ag, Cd, Sn, W, Hg, Pb, Bi, Th, U, Au, Nb and Ta. Gold and Tin are the main minerals disseminated in the schist.

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Price: 37.99 EUR excl. shipping

Stories in Stone: Travels Through Urban Geology , Hörbuch, Digital, ungekürzt, 589min

Within the fabric of every stone building is a wondrous story of geological origins, architectural aesthetics, and cultural history. You probably don’t expect to make geological finds along the sidewalks of a major city, but when natural history writer David B. Williams looks at the stone masonry, facades, and ornamentations of buildings, he sees a range of rocks equal to any assembled by plate tectonics. In Stories in Stone, he introduces us to a three-and-a-half-billion-year-old rock called Morton gneiss that is the color of swirled pink-and-black taffy; a 1935 gas station made of petrified wood; and a fort in St. Augustine, Florida, that has withstood 300 years of attacks and hurricanes, despite being made of a stone (coquina) that has the consistency of a granola bar. Williams shows us why a white, fossil-rich limestone from Indiana became the only building stone to be used in all 50 states; how the construction of the granite Bunker Hill Monument in 1825 led to America’s first commercial railroad; and why Carrara marble - the favorite sculpting material of Michelangelo - warped so much after only 19 years on a Chicago skyscraper that all 44,000 panels of the stone had to be replaced. From Brooklyn to Philadephia, from limestone to travertine, Stories in Stone will inspire readers to realize that, even in the most modern metropolis, evidence of our planet’s natural wonders can be found all around us in building stones that are far less ordinary than we might think at first glance. ungekürzt. Language: English. Narrator: Michael Prichard. Audio sample: https://samples.audible.de/bk/adbl/009643/bk_adbl_009643_sample.mp3. Digital audiobook in aax.

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Price: 9.95 EUR excl. shipping

Geopedia (eBook, ePUB)

A garden of geologic delights for all EarthlingsGeopedia is a trove of geologic wonders and the evocative terms that humans have devised to describe them. Featuring dozens of entries-from Acasta gneiss to Zircon-this illustrated compendium is brimming with lapidary and lexical insights that will delight rockhounds and word lovers alike.Geoscientists are magpies for words, and with good reason. The sheer profusion of minerals, landforms, and geologic events produced by our creative planet demands an immense vocabulary to match. Marcia Bjornerud shows how this lexicon reflects not only the diversity of rocks and geologic processes but also the long history of human interactions with them.With wit and warmth, she invites all readers to celebrate the geologic glossary-a gallimaufry of allusions to mythology, imports from diverse languages, embarrassing anachronisms, and recent neologisms. This captivating book includes cross-references at the end of each entry, inviting you to leave the alphabetic trail and meander through it like a river. Its pocket-friendly size makes it the perfect travel companion no matter where your own geologic forays may lead you.With whimsical illustrations by Haley Hagerman, Geopedia is a mix of engaging and entertaining facts about how the earth works, how it has coevolved with life over billions of years, and how our understanding of the planet has deepened over time.Features a real cloth cover with an elaborate foil-stamped design

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Price: 11.95 EUR excl. shipping

Outer Hebrides

This new, thoroughly updated second edition of Bradt's Outer Hebrides: The Western Isles of Scotland, from Lewis to Barra by experienced writer and journalist Mark Rowe is the only full-size guide to focus solely on the islands of Lewis, Harris, St Kilda, North Uist, Benbecula, South Uist, Eriskay, Barra and Vatersay. Masses of background information is included, from geography and geology to art and architecture, with significant coverage of wildlife, too, as well as all the practical details you could need: when to visit, suggested itineraries, public holidays and festivals, local culture, plus accommodation and where to eat and drink. Walkers, bird-watchers, wildlife photographers, beach lovers and genealogists are all catered for, and this is an ideal guide for those who travel simply with curious minds to discover far-flung places of great cultural, historical and wildlife interest. The Outer Hebrides is an archipelago of 15 inhabited islands and more than 50 others that are free of human footprint. Huge variations in landscape are found across the islands, from Lewisian gneiss, which dates back almost three billion years, to rugged Harris with its magnificent sands running down its western flanks and the windswept, undulating flatness and jagged sea lochs of the Uists. This is a land where Gaelic is increasingly spoken and ancient monuments abound, where stunning seabird colonies and birds of prey can be watched, and where the grassy coastal zones known as the machair are transformed into glorious carpets of wildfllowers in late spring and summer. Whether visiting the Standing Stones of Callanish, the Uig peninsula, Barra's Castlebay, or historic St Kilda, or if you just want to experience the romance of the Sound of Harris, one of the most beautiful ferry journeys in the world, Bradt's Outer Hebrides: The Western Isles of Scotland, from Lewis to Barra has all the information you need.

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Price: 15.99 EUR excl. shipping