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America's unrestricted access to the Atlantic and Pacific Oceans, Gulf of Mexico, rivers, Great Lakes, and Arctic region powers domestic and global commerce. The ease of moving cargo and people beyond our coasts fuels the Nation's competitive advantage, advances trade, generates capital, and drives the domestic economy forward, in turn projecting strength abroad and safeguarding our national interests. Similarly, the biological diversity and productivity of the ocean sustains the health of coastal communities and promotes a vibrant national economy. The ocean also plays a fundamental role in the Earth system. Ensuring responsible ocean stewardship with science and technology (S&T) breakthroughs depends on a strategic Federal portfolio supported by foundational basic research. Science and Technology for America's Oceans: A Decadal Vision identifies pressing research needs and areas of opportunity within the ocean S&T enterprise for the decade 2018-2028.
The North Britons are the least-known among the inhabitants of early medieval Scotland. Like the Picts and Vikings they played an important role in the shaping of Scottish history during the first millennium AD but their part is often neglected or ignored. This book aims to redress the balance by tracing the history of this native Celtic people through the troubled centuries from the departure of the Romans to the arrival of the Normans. The fortunes of Strathclyde, the last-surviving kingdom of the North Britons, are studied from its emergence at Dumbarton in the fifth century to its eventual demise in the eleventh. Other kingdoms, such as the Edinburgh-based realm of Gododdin and the mysterious Rheged, are examined alongside fragments of heroic poetry celebrating the valour of their warriors. Behind the recurrent themes of warfare and political rivalry runs a parallel thread dealing with the growth of Christianity and the influence of the Church in the affairs of kings. Important ecclesiastical figures such as Ninian of Whithorn and Kentigern of Glasgow are discussed, partly in the hope of unearthing their true identities among a tangled web of sources. The closing chapters of the book look at how and why the North Britons lost their distinct identity to join their old enemies the Picts as one of Scotland's vanished nations.
Weaving natural history, memoir, and the stories of maverick scientists, daring adventurers, and stargazing dreamers, this book takes us from Antarctica to outer space to tell the tale of how the study of meteorites became a scientific passion--From publisher description.
First published in 1977, this classic excavation report set new standards in reporting archaeological finds. It describes the excavation of an early medieval site near Wooler in Northumberland, identified as Ad Gefrin by the Venerable Bede.
Deep subsurface microbiology is a highly active and rapidly advancing research field at the interface of microbiology and the geosciences; it focuses on the detection, identification, quantification, cultivation and activity measurements of bacteria, archaea and eukaryotes that permeate the subsurface biosphere of deep marine sediments and the basaltic ocean and continental crust. The deep subsurface biosphere abounds with uncultured, only recently discovered and – at best - incompletely understood microbial populations. In spatial extent and volume, Earth's subsurface biosphere is only rivaled by the deep sea water column. So far, no deep subsurface sediment has been found that is entirely devoid of microbial life; microbial cells and DNA remain detectable at sediment depths of more than 1 km; microbial life permeates deeply buried hydrocarbon reservoirs, and is also found several kilometers down in continental crust aquifers. Severe energy limitation, either as electron acceptor or donor shortage, and scarcity of microbially degradable organic carbon sources are among the evolutionary pressures that have shaped the genomic and physiological repertoire of the deep subsurface biosphere. Its biogeochemical role as long-term organic carbon repository, inorganic electron and energy source, and subduction recycling engine continues to be explored by current research at the interface of microbiology, geochemistry and biosphere/geosphere evolution. This Research Topic addresses some of the central research questions about deep subsurface microbiology and biogeochemistry: phylogenetic and physiological microbial diversity in the deep subsurface; microbial activity and survival strategies in severely energy-limited subsurface habitats; microbial activity as reflected in process rates and gene expression patterns; biogeographic isolation and connectivity in deep subsurface microbial communities; the ecological standing of subsurface biospheres in comparison to the surface biosphere – an independently flourishing biosphere, or mere survivors that tolerate burial (along with organic carbon compounds), or a combination of both? Advancing these questions on Earth’s deep subsurface biosphere redefines the habitat range, environmental tolerance, activity and diversity of microbial life.