In the second revised edition of this widely used textbook, practical aspects are given particular emphasis. Two new chapters have been added-one on geology in engineering, another summarizing the subject matter of physical geology and explaining its relation to earth history. The chapter on geology in engineering, and those on minerals and mineral deposits, offer especially good material for a...

a State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China b State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China c Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA d Department of Geology and Geophysics, Yale University, New Haven, CT 0652...

Most He in deep-sea sediments is derived from fine-grained extraterrestrial matter known as interplanetary dust particles (IDPs). These particles, typically\50 lm in diameter, are sufficiently small to retain solar windimplanted He with high He/He ratios during atmospheric entry heating. This extraterrestrial He (HeET) is retained in sediments for geologically long durations, having been detect...

Virtually our entire knowledge of the universe comes from two sorts of measurement of the electromagnetic radiation from the stars and galaxies within it; either their flux through relatively wide bandpasses (photometry), or measurements of the shape and wavelength of relatively narrow lines via spectroscopy. These techniques are now being used to discover planets outside our solar system, and ...

A methodology for the mobility evaluation and mission oriented performance assessment of an autonomous mobile robot is developed. The evaluation strategy uses both time and energy based measures resulting in the development of isochronal/isoenergy contours which characterize the expected mobility of the robot over novel terrain using sample trials on patches of land prior to the mission. This w...

I am delighted to announce completion of the second issue of the new journal of “Geopersia”, a product of the new era of replacing the Persian language journals with specific English-language ones. Our purpose is to provide a journal that offers a multi-disciplinary analysis of issues concerning Geology subjects (i.e. sedimentology, stratigraphy, paleontology, Petroleum Geology, Engineering Geo...