Publications
Filter Total Items: 3143
Caldera collapse in the Galápagos Islands, 1968 Caldera collapse in the Galápagos Islands, 1968
The summit caldera of Isla Fernandina, a large, uninhabited basaltic shield volcano, was further enlarged by 1 to 2 km3 in June 1968. A small quake and large vapor cloud on 11 June were followed 4 hours later by a remarkable volcanic ash cloud and, after another hour, by a major explosion recorded at infrasonic stations throughout the hemisphere. Seismic activity increased to a peak on...
Authors
T. Simkin, K. A. Howard
Kilauea Volcano: The 1967-68 summit eruption Kilauea Volcano: The 1967-68 summit eruption
On 5 November 1967 Kilauea volcano began erupting lava from vents on the floor of its summit pit crater. Halemaumau, 170 meters deep. This eruption ended nearly 2 years of the quiescence that followed a short lived eruption on the east rift zone of Kilauea in December 1965 (1). The 1967-68 eruption was the first activity in Halemaumau since July 1961 (2). The eruption ceased on 13 July...
Authors
Willie Tomoni Kinoshita, R. Y. Koyanagi, Thomas L. Wright, Richard S. Fiske
Inflation of Kilauea Volcano prior to its 1967-1968 eruption: Vertical and horizontal deformation give clues regarding the structure of an active Hawaiian volcano Inflation of Kilauea Volcano prior to its 1967-1968 eruption: Vertical and horizontal deformation give clues regarding the structure of an active Hawaiian volcano
No abstract available.
Authors
Richard S. Fiske, Willie Tomoni Kinoshita
Distribution of scandium between coexisting biotite and hornblende in igneous rocks Distribution of scandium between coexisting biotite and hornblende in igneous rocks
Scandium analyses of more than 90 pairs of coexisting biotite and hornblende from igneous rocks of various provinces (including Southern California, Boulder, Sierra Nevada, Boulder Creek batholiths and the Jemez Mountains volcanic rocks) indicate that the distribution ratio (Kd = Schornblende/Scbiotite) for most samples closely approached that of an equilibrium distribution. Median Kd...
Authors
Robert I. Tilling, L. Paul Greenland, D. Gottfried