Publications
Filter Total Items: 3149
A history of paleoflood hydrology in the United States A history of paleoflood hydrology in the United States
The origins of paleoflood hydrology in the United States can be traced back to the beginning of the 19th century, when windgaps and watergaps in the Applachians were believed to have been eroded by extraordinary floods as large lakes that were ponded behind the ridges rapidly drained. Sediment evidence for extraordinary floods was evoked several decades later when glacial sediments in...
Authors
John E. Costa
Earthquakes September-October 1985 Earthquakes September-October 1985
No abstract available.
Authors
Waverly J. Person
Groundwater flow and mass-movement dynamics, [abs.] Groundwater flow and mass-movement dynamics, [abs.]
No abstract available.
Authors
R.M. Iverson
Pliocene volcanic rocks of the Coso Range, Inyo County, California Pliocene volcanic rocks of the Coso Range, Inyo County, California
No abstract available.
Authors
Steven W. Novak, Charles R. Bacon
Lithic breccia and ignimbrite erupted during the collapse of Crater Lake Caldera, Oregon Lithic breccia and ignimbrite erupted during the collapse of Crater Lake Caldera, Oregon
The climactic eruption of Mount Mazama (6845 y.B.P.) vented a total of ∼50 km3 of compositionally zoned rhyodacitic to basaltic magma from: (a) a single vent as a Plinian pumice fall deposit and the overlying Wineglass Welded Tuff, and (b) ring vents as ignimbrite and coignimbrite lithic breccia accompanying the collapse of Crater Lake caldera. New field and grain-size data for the ring...
Authors
T. H. Druitt, C. R. Bacon
Long Valley is quiet but still bulging Long Valley is quiet but still bulging
No abstract available.
Authors
R. A. Kerr
Signs of a northeastern earthquake? Signs of a northeastern earthquake?
No abstract available.
Authors
R.L. Kerr
Magmatic inclusions in silicic and intermediate volcanic rocks Magmatic inclusions in silicic and intermediate volcanic rocks
Fine‐grained ellipsoidal inclusions from a few millimeters to over l m in size are present in many intermediate to silicic lava flows and domes. Only recently has it become widely accepted that such inclusions are chilled blobs of magma. Their magmatic origin is manifested by vesicularity and high groundmass porosity, by ellipsoidal shapes, by mingling at contacts with the host, and by...
Authors
Charles R. Bacon