Every year Earth is bombarded with about 40,000 tons of extraterrestrial material. This includes microscopic cosmic dust particles shed by comets and asteroids in outer space, meteorites, as well as large comets and asteroids that have led to catastrophic events in the geologic past. Originally considered only a curiosity, extraterrestrial matter found on Earth provides the only samples we have from comets, asteroids and other planets. Only recently mankind has started to actively collect extraterrestrial matter in space (Apollo program, Stardust mission) rather than to wait for its delivery to Earth. Still, most of our knowledge of the origin and evolution of our solar system is based on careful studies of meteorites, cosmic dust, and traces of large impact events in the geologic record such as the mass extinction that terminated the Cretaceous Period and led to the extinction of the dinosaurs. This book summarizes our current knowledge of the properties, origin, orbital evolution and accretion mechanism of extraterrestrial matter accreted on Earth and sheds light on accretion processes and fluxes in the geologic past. The chapters in the first part of the book are arranged in order to follow extraterrestrial matter from its origin in space, its orbital evolution on its way to Earth, its interaction with the Earth magnetosphere and atmosphere to its more or less violent collision with the Earth's surface. In the second part of the book several chapters deal with the present?day flux of cosmic dust and meteorites to Earth. Finally, several chapters deal with the reconstruction of the accretion history of extraterrestrial matter on Earth, starting with the most recent geologic past and ending with the very early, violent accretion period shortly after the formation of Earth, Moon and other solid planets in our solar system.

The book contains private views of experts from various countries on the role of geological mapping in sustainable development. New technologies and concepts are presented, which are either awaiting for recognition by Geological Surveys, or are gradually applied in some survey. The target of the book is well worded in the "Summary and recommendations" elaborated by the Ad Hoc Committee at the Advanced Research Workshop on Innovative Geological Cartography, held under NATO sponsorship in Poland in November 2003. After the "Summaries" were issued by the end of 2003, the authors who presented their views at the Workshop, gave a revised version of their papers with more new ideas and material. Generally, the book is addressed to cartographers in Geological Surveys, geologists and geographers co-operating with landuse planners, ecologists and decision makers, who may learn about the state-of-the-art and the enormous information potential of the modern information technologies in Geosciences. The book, however, gives no methodological recipes but, as it was the authors' intention, may and shall be used as a guide-book in modernizing Information Technologies at the local, regional and national levels in Geosciences.

Presents information from the primary abiotic forces defining the system, and from the present hydrology, biogeochemistry and physics of major sites of organic carbon production of the McMurdo Dry Valleys. Additionally, research on the physical, chemical, and biological properties of the dry valley soils is included. The role of environmental management in long-term ecological studies is also addressed. The accompanying CDROM provides details and scale to visualize the McMurdo Dry Valleys from an ecosystem perspective.

An extraordinary debut set in Toronto, unfurling against the backdrop of an ancient Persian love story. The story of Layla and Majnun, made immortal by the Persian poet Nizami Ganjavi in the 12th century, has been retold thousands of times, in thousands of different ways, throughout literature. Against the backdrop of this story, to the sound-track of modern hip-hop, and amid the struggle of an immigrant family to instill an old faith under new conditions, Irfan Ali's Accretion hurtles towards an unsustainable, "greater madness." Majnun, one of the foundational literary characters who haunt Accretion, is also an Arabic epithet for "possessed." In this tradition, Ali has written a book from the places where the self is no longer the self; places where, in order not to shut down forever, the debris must be cleared, and the soul must inch towards love and hope, "on memory's dusty beams." Accretion is written in a contemporary lyricism that honours ancient poetic traditions. It is a familiar story, imbued with a particularity and honesty that only Irfan Ali could bring to the table. "Irfan Ali delves fearlessly into the beauty and cruelty of a utilitarian city and the chasms between people. The struggle between head and heart binds these poems. In fact, Accretion might be considered a roadmap for finding love in everything--ourselves, family, soul mates, urban life, and faith." --Emily Pohl-Weary, author of Ghost Sick "In Black Skin, White Masks, Frantz Fanon prays, pleads, 'O my body, make of me always a man who questions!' Irfan Ali undertakes this mission in Accretion. He knows there's no Faith more unquestionably powerful than Faith that empowers constant self-questioning. ...His speaker's neither a zealot nor an infidel, but someone whose obsessions get mistaken by an imam for piety. Every poet's a theologian, but Ali recognizes that Faith 'is the path between lovers' games'..." --George Elliott Clarke, 7th Parliamentary Poet Laureate of Canada (2016 & 2017)