Technical Papers Some Applications of the Rapid Uptake of Vitamin B12 by Resting Lactobacillus leschmannii Organisms: Robert L. Davis and Bacon F. Chow 351 On the Interaction of Mesons and Plural vs. Multiple Meson Production: Alexander W. Stern ~ _ _ 352 A Rapid Titrimetric Method for Determining the Water Content of Animal Tissues: Sherburne F. Cook, Carl F. Cramer, and Keith Kenyon__._ 353 4...

—The mid-Tertiary-age volcanoes, dikes, and sills of the Navajo volcanic field are classic and geologically-distinctive landforms of the Colorado Plateau. They are the products of structurally-controlled magma ascent, explosive eruptions, and deep post-eruptive exhumation. Igneous rock types include potassic lamprophyres, serpentinized tuffs, and exotic mafic and ultramafic intrusives. These ro...

During the last century, the Earth Sciences underwent two major revolutions in understanding. The first was the recognition of the great antiquity of the Earth and the second was the development of plate tectonic theory. These leaps in knowledge moved geology from its largely descriptive origins and established the modern, quantitative, Earth sciences. For any science, and particularly for the ...

The concept whereby heat is recovered from a geothermal reservoir by replacing the native aqueous phase with essentially pure high-pressure carbon dioxide as the working fluid is referred to as an Enhanced Geothermal System with CO2 (EGSCO2). The concept has yet to be tested in the field, and the chemical consequences, both within the reservoir itself, and at its periphery, are not fully unders...

Solutions of water and a salt or sugar make excellent experimental analog magmas for teaching concepts of igneous petrology because of the comparatively low temperatures involved, the simplicity of the apparatus needed, and the responsiveness of familiar chemical systems. Boiling of these aqueous solutions on a hot plate can be used to increase the concentration of a dissolved salt or sugar to ...

Abstract Knowledge of the timing closure Meso-Tethys Ocean as represented by Bangong–Nujiang Suture Zone, i.e., Lhasa-Qiangtang collision, is critical for understanding Mesozoic tectonics Tibetan Plateau. But this hotly debated; existing suggestions vary from Middle Jurassic (ca. 166 Ma) to Late Cretaceous 100 Ma). In study, we describe petrology Zhonggang igneous–sedimentary rocks in middle se...

High-energy synchrotrons are valuable sources of highly collimated, intense X-ray radiation for use in X-ray microprobe analysis including trace element quantification (X-ray fluorescence), chemical speciation determinations (X-ray absorption fine structure spectroscopy) and phase identification (X-ray diffraction). Kirkpatrick-Baez mirrors are being increasingly utilized for production of X-ra...