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Author: Billy P. Glass Publisher: Springer Science & Business Media ISBN: 3540882626 Category : Science Languages : en Pages : 723
Book Description
Impact cratering is an important geological process on all solid planetary bodies, and, in the case of Earth, may have had major climatic and biological effects. Most terrestrial impact craters have been erased or modified beyond recognition. However, major impacts throw ejecta over large areas of the Earth's surface. Recognition of these impact ejecta layers can help fill in the gaps in the terrestrial cratering record and at the same time provide direct correlation between major impacts and other geological events, such as climatic changes and mass extinctions. This book provides the first summary of known distal impact ejecta layers
Author: Billy P. Glass Publisher: Springer Science & Business Media ISBN: 3540882626 Category : Science Languages : en Pages : 723
Book Description
Impact cratering is an important geological process on all solid planetary bodies, and, in the case of Earth, may have had major climatic and biological effects. Most terrestrial impact craters have been erased or modified beyond recognition. However, major impacts throw ejecta over large areas of the Earth's surface. Recognition of these impact ejecta layers can help fill in the gaps in the terrestrial cratering record and at the same time provide direct correlation between major impacts and other geological events, such as climatic changes and mass extinctions. This book provides the first summary of known distal impact ejecta layers
Author: W. A. Roberts Publisher: ISBN: Category : Nuclear excavation Languages : en Pages : 68
Book Description
This project included 146 ejecta measurement stations encircling ground zero at eight radial distances ranging from 373 to 1,707 meters. The twenty-four sampling lines were spaced at fifteen-degree intervals. Data presented were recovered from stations located at radial dis tances of 640, 853, 1,067, 1,280, and 1,707 meters. An attempt will be made to recover data at stations located closer to ground zero at a later time. Preliminary analysis of ejecta data indicates that a real density varies inversely as distance raised to the 3.64 power. Circumfer ential variation of areal density is about a factor of 30 at the 1,707 meter radial distance, a factor of 10 at the 1,280 meter radial dis tance, and a factor of 7 at the 853 meter radial distance. (Author).
Author: M. V. Anthony Publisher: ISBN: Category : Blasting Languages : en Pages : 210
Book Description
A study was made of the distribution of ejecta from the crater formed by exploding 20 tons of TNT at the surface of a limestone outcrop. The distributions of both in situ material and material artificially introduced into the medium before the explosion are described. Variations with distance from burst point in ejecta areal density and the size distribution of ejecta are analyzed. Relationships between ejecta distribution and site topography and geology are discussed. Suggestions are made as to further work directed toward improving methods of predicting ejecta distribution from large explosions on rock. (Author).
Author: Landon K. Davis Publisher: ISBN: Category : Blast effect Languages : en Pages : 56
Book Description
The results of various previously reported investigations of the Danny Boy event are utilized to compute and compare the volumes of ejected material and volumes attributable to other crater-formation mechanisms. Imbalance of the volumetric contributions is attributed primarily to the uncertainty of the ejecta density in the lip region. Approximately 65 percent of the rock material dissociated by the explosion was permanently ejected from the crater; less than 2 percent of the ejected material was deposited beyond 3 crater radii from ground zero. Comparisons are made with high-explosive and nuclear detonations in desert alluvium. (Author).
Author: Thomas Kenkmann Publisher: Geological Society of America ISBN: 0813723841 Category : Science Languages : en Pages : 486
Book Description
"The third volume of the series “Large Meteorite Impacts” provides an updated and comprehensive overview of modern impact crater research. In 26 chapters, more than 90 authors from Europe, the United States, Russia, Canada, and South Africa give a balanced, firsthand account of the multidisciplinary field of cratering science, with reports on field studies, geophysical analyses, and experimental and numerical simulations. Nine chapters focus on structure, geophysics, and cratering motions of terrestrial craters. Recent advances in impact ejecta studies and shock metamorphism are assembled, each with seven chapters, and three chapters extend the scope from a terrestrial to a planetary perspective."--pub. desc.
Author: Gillian R. Foulger Publisher: Geological Society of America ISBN: 0813725534 Category : Science Languages : en Pages : 448
Book Description
"This unusual book, published to honor Warren Bell Hamilton, comprises a diverse, cross-disciplinary collection of bold new ideas in Earth and planetary science. This volume is a rich resource for researchers at all levels looking for interesting, unusual, and off-beat ideas to investigate or set as student projects"--
Author: Billy P. Glass
Author: Billy P. Glass
Author: W. A. Roberts
Author: Mark Settle
Author: M. V. Anthony
Author: Eugene E. Addor
Author: Luke J. Vortman
Author: Landon K. Davis
Author: Thomas Kenkmann
Author: Robert Warren Henny
Author: Gillian R. Foulger