Publications
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Argon-40: Excess in submarine pillow basalts from Kilauea Volcano, Hawaii
Submarine pillow basalts from Kilauea Volcano contain excess radiogenic argon-40 and give anomalously high potassium-argon ages. Glassy rims of pillows show a systematic increase in radiogenic argon-40 with depth, and a pillow from a depth of 2590 meters shows a decrease in radiogenic argon-40 inward from the pillow rim. The data indicate that the amount of excess radiogenic argon-40 is a direct f
Authors
G. Brent Dalrymple, James G. Moore
The role of olivine in the crystallization of the prehistoric Makaopuhi tholeiitic lava lake, Hawaii
On eruption, the tholeiitic basalt lava of the prehistoric Makaopuhi lake contained nearly seven percent euhedral olivine phenocrysts of approximately Fa14 composition. In the center of the 225 foot vertical section of the lake, the lava became more than 90 percent solid at 1000° C after about 30 years. At the surface the lava was quenched to air temperature, whereas, at the bottom, quenching to 8
Authors
James G. Moore, B.W. Evans
Volcanic hazards at Mount Rainier, Washington
Mount Rainier is a large stratovolcano of andesitic rock in the Cascade Range of western Washington. Although the volcano as it now stands was almost completely formed before the last major glaciation, geologic formations record a variety of events that have occurred at the volcano in postglacial time. Repetition of some of these events today without warning would result in property damage and los
Authors
Dwight Raymond Crandell, Donal Ray Mullineaux
The September 28–30, 1965 eruption of Taal Volcano, Philippines
A moderately violent phreatomagmatic explosive eruption of Taal Volcano, Philippines, occurred from 28 to 30 September, 1965. The main phreatic explosions, which were preceded by ejection of basaltic spatter, opened a new crater 1.5 km long and 0.3 km wide on the southwest side of Volcano Island in Lake Taal. The eruption covered an area of about 60 square kilometers with a blanket of ash more tha
Authors
James G. Moore, K. Nakamura, A. Alcaraz
Gravity slide origin of rift zones of some Hawaiian volcanoes
The east-trending east rift zone of Kilauea volcano on the island of Hawaii is 50 km long and up to 3 km wide. It consists of three elements arranged roughly in three belts from north to south: 1) eruptive fissures, cracks, faults, and narrow grabens, 2) cinder cones (produced by eruptions more localised than the fissure eruptions), and 3) pit craters. Eruptive vents, either fissure or cone, do no
Authors
James G. Moore
Structure, metamorphism, and plutonism in the south-central Klamath Mountains, California
In the south-central Klamath Mountains 50 miles of the the north-trending central metamorphic belt and adjacent parts of the eastern Paleozoic and western Paleozoic and Triassic belts have been mapped and studied in detail. Within the central metamorphic belt a sequence of three lithologically distinctive metamorphic units has been recognized (from bottom to top): (1) siliceous metasedimentary roc
Authors
Gregory A. Davis, M. J. Holdaway, Peter W. Lipman, W. D. Romey
Geologic map of the Topopah Spring SW quadrangle, Nevada
No abstract available.
Authors
Peter W. Lipman, E. J. McKay
Geologic map of the Topopah Spring NW quadrangle, Nye County, Nevada
No abstract available.
Authors
Robert L. Christiansen, Peter W. Lipman
Lava tree molds of the September 1961 eruption, Kilauea Volcano, Hawaii
Well-developed lava tree molds were formed during the September 1961 eruption along the east rift zone of Kilauea Volcano. The upright molds were produced where fluid lava, flowing through dense tropical forest, became chilled against the larger trees and tree ferns and later drained away. Where the lava ponded temporarily in a structural valley, tree molds more than 14 feet high mark the high lev
Authors
James G. Moore, D.H. Richter
Fifth special report of the Hawaiian Volcano Observatory of the Hawaiian Volcano Research Association and the U.S. Geological Survey: Abrasion hardness
After reviewing the work of sclerometry, this paper shows that yielding and relative softness are the mechanical basis of what should be called malacometry. The experiments have been made with diamond drills, ring cuts, end millers and grinding wheels.Auerbach's "limited scope of the Mohs list" is quantitatively confirmed. The wear of diamonds is examined.A program is carried out, for rotary or an
Authors
T. A. Jaggar
Fourth special report of the Hawaiian Volcano Observatory of the U.S. Geological Survey and the Hawaiian Volcano Research Association: Steam blast volcanic eruptions: A study of Mount Pelée in Martinique as type volcano
The investigation is concerned with the author's expedition to Martinique and St. Vincent in 1902 and comparison of the experience of investigators and sufferers with that of others in so-called "explosive" eruptions. The Hawaiian mechanism is reviewed with special reference to rifts, underground water, intrusion furnace, wedge rupture, and lowering of magma. These features of structure are applie
Authors
T. A. Jaggar
Third special report of the Hawaiian Volcano Observatory of Hawaii National Park and the Hawaiian Volcano Research Association: Ash formations of the island Hawaii
The purpose of the study was to determine the areal extent of the various volcanic ash formations, to describe them petrographically and to develop means of discriminating them. The ash formations, long known in a general way, had been only casually observed by geologists. Their interpretation and separation from other surficial materials has been much retarded by great differences in the degree o
Authors
Chester K. Wentworth