Publications
Filter Total Items: 2344
Large quaternary landslides in the central appalachian valley and ridge province near Petersburg, West Virginia Large quaternary landslides in the central appalachian valley and ridge province near Petersburg, West Virginia
Geological mapping and photointerpretation of side-looking airborne radar images and color-infrared aerial photographs reveal two large Quaternary landslides in the Valley and Ridge province of the central Appalachians near Petersburg, W. Va. The Elkhorn Mountain rock avalanche occurs on the thrust-faulted northwestern flank of the Elkhorn Mountain anticlinorium. A minimum of 7 × 106 m3...
Authors
C. Scott Southworth
The geometric signature: Quantifying landslide-terrain types from digital elevation models The geometric signature: Quantifying landslide-terrain types from digital elevation models
Topography of various types and scales can be fingerprinted by computer analysis of altitude matrices (digital elevation models, or DEMs). The critical analytic tool is the geometric signature, a set of measures that describes topographic form well enough to distinguish among geomorphically disparate landscapes. Different surficial processes create topography with diagnostic forms that...
Authors
R.J. Pike
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, June 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, June 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, September 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, October 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, October 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Evidence for a new geomagnetic reversal from lava flows in Idaho: Discussion of short polarity reversals in the Brunhes and late Matuyama polarity chrons Evidence for a new geomagnetic reversal from lava flows in Idaho: Discussion of short polarity reversals in the Brunhes and late Matuyama polarity chrons
K-Ar ages and paleomagnetic data for basalt samples from a new core hole (site E) at the Idaho National Engineering Laboratory (INEL) indicate that the age of the reversed polarity event recorded in Snake River Plain lavas is older than 465±50 ka (1000 years before present) reported previously by Champion et al. (1981). Nine basalt flows, eight with normal polarity and one with reversed...
Authors
D.E. Champion, M. A. Lanphere, M. A. Kuntz
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, January 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, February 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models
At the IUGG Assembly at Vancouver during August 1987 new definitive geomagnetic reference field (DGRF) models to degree 10 for 1945, 1950, 1955, and 1960 were adopted by IAGA. Before these new DGRF models were accepted, the author developed a trend and trigonometric model (old trig model) based on the models IGRF 1945, IGRF 1950, IGRF 1955, IGRF 1960, DGRF 1965, DGRF 1970, DGRF 1975...
Authors
L.R. Alldredge
Range indices of geomagnetic activity Range indices of geomagnetic activity
The simplest index of geomagnetic activity is the range in nT from maximum to minimum value of the field in a given time interval. The hourly range R was recommended by IAGA for use at observatories at latitudes greater than 65??, but was superceded by AE. The most used geomagnetic index K is based on the range of activity in a 3 h interval corrected for the regular daily variation. In...
Authors
W.F. Stuart, A.W. Green
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, April 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1988 Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, December 1988
No abstract available.
Authors
John B. Townshend, R. V. O’Connell, L.Y. Torrence