Publications
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Tectonostratigraphic terranes of northern California
No abstract available.
Authors
M. Clark Blake, A. S. Jayko, R. J. McLaughlin
Tectonostratigraphic terranes in southwest Oregon
No abstract available.
Authors
M. C. Blake, Jr., D.E. Engebretson, A. S. Jayko, J. L. Jones
Stratigraphy and tectonic significance of the Mesozoic tectonostratigraphic terranes of the Vizcaino Peninsula, Baja California Sur, Mexico
No abstract available.
Authors
Thomas E. Moore
Petroleum industry drilling in industrialized and developing areas
International drilling statistics show significant differences in target depths as well as the mix between onshore and offshore wells. Unlike the USA, where most of the drilling has been concentrated in depths to 5000 f (shallow depths), the preponderance of wildcat wells drilled in South America and Africa reach much deeper horizons. Offshore wildcat drilling represents less than 4% of total US w
Authors
Emil D. Attanasi
Fluorine in Colorado oil shale
Oil shale from the lower part of the Eocene Green River Formation in the Piceance Creek Basin, Colorado, averages 0.13 weight percent fluorine, which is about twice that found in common shales, but is the same as the average amount found in some oil shales from other parts of the world. Some fluorine may reside in fluorapatite; however, limited data suggest that cryolite may be quantitatively more
Authors
John R. Dyni
Reconnaissance landslide map of the Healdsburg 15-minute Quadrangle, Sonoma County, California
No abstract available.
Authors
Carl M. Wentworth
Book review: Methods of rock magnetism and palaeomagnetism
Book information: Methods of rock magnetism and palaeomagnetism — Techniques and instrumentation: D.W. Collinson. Chapman and Hall, London, 1983, xiv + 503 pp.
Authors
Ray E. Wells
Paleomagnetism and geology of Eocene volcanic rocks of southwest Washington, implications for mechanisms of tectonic rotation
Paleomagnetic and geologic investigations in Eocene volcanic rocks of the southwest Washington Coast Range demonstrate a close relationship between tectonic rotations and the local structural geology. The allochthonous middle Eocene submarine basalt basement of the Crescent Formation consists of several fault‐bounded structural domains up to 30 km across that are characterized by different amounts
Authors
Ray E. Wells, Robert S. Coe
The Steens Mountain (Oregon) geomagnetic polarity transition: 1. Directional history, duration of episodes, and rock magnetism
The thick sequence of Miocene lava flows exposed on Steens Mountain in southeastern Oregon is well known for containing a detailed record of a reversed‐to‐normal geomagnetic polarity transition. Paleomagnetic samples were obtained from the sequence for a combined study of the directional and intensity variations recorded; the paleointensity study is reported in a companion paper. This effort has r
Authors
Edward A. Mankinen, M. Prevot, C. Sherman Grommé, Robert S. Coe
The Steens Mountain (Oregon) geomagnetic polarity transition, 2. Field intensity variations and discussion of reversal models
We carried out an extensive paleointensity study of the 15.5±0.3 m.y. Miocene reversed‐to‐normal polarity transition recorded in lava flows from Steens Mountain (south central Oregon). One hundred eighty‐five samples from the collection whose paleodirectional study is reported by Mankinen et al. (this issue) were chosen for paleointensity investigations because of their low viscosity index, high C
Authors
M. Prevot, Edward A. Mankinen, Robert S. Coe, C. Sherman Grommé