Sheeted Clastic Dikes in the Megaflood Region
The definitive article on clastic dikes in Eastern Washington. Origin, age, character, and distribution are discussed. Data driven research.
Near- and Far-Field Hydrofracture in the Formation of Sheeted Clastic Dikes
Near field (blue) and far field (red) hydrofracture curves shown. During the hydrofracture period, fluid pressure drops as fractures...
Geology at the Colville River Mouth - Lake Roosevelt, WA
Colville River Mouth. The Colville River enters the Columbia River at Rivermile 100 just south of Kettle Falls, WA. Its an easy hike...
Paleoseismic Trenches in Eastern Washington
Locations of paleoseismic trenches and Quaternary faults in Eastern Washington. Trenches excavated across fault scarps, often visible in...
Ancient Flood Gravel Beneath a Thick Calcrete Ledge - White Bluffs, WA
Exotic clasts in gravel. An exotic clast-bearing conglomerate at White Bluffs Overlook was left by an ancient Ice Age flood. The...
Fracture Notes - In progress
What are cracks and fractures? How does hydraulic fracturing work? How does HF relate to sheeted clastic dikes? In this post, I reveal...
Clastic Dikes Literature Relevant to Eastern Washington 1820-2020
Fieldwork in Burlingame Canyon near Walla Walla in July 1995. Several dozen articles, abstracts, consultant reports, and field guides...
Fault Scarp or Ranch Road? Review of USGS paleoseismic trench near Wallula, WA
Trenching at Wallula, WA In 2020, the U.S. Geological Survey excavated a trench across a suspected fault scarp near Wallula, WA in an...
Clastic Dikes: The Tops of Clastic Dikes
The tops of clastic dikes in the megaflood region appear five ways. 1.) Truncated at a bedding contact or an erosional surface 2.)...
Clastic Dikes: Sand Dikes Intruding Bedrock
Clastic Dikes in Basalt Bedrock Sheeted dikes with sandy fills intrude downward into Miocene Columbia River Basalt in the Walla Walla...
