Paleoseismic Trenches in Eastern Washington
Locations of paleoseismic trenches and Quaternary faults in Eastern Washington. Trenches excavated across fault scarps, often visible in...
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.
Ancient Flood Beds & Calcrete - 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...
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...
Clastic Dikes in Eastern Washington: Formed by Lateral Spreading?
Lateral spreads. A network of lateral spread fractures in pavement formed by an earthquake. Peru 1970. USGS photo archive. Lateral...
Clastic Dikes: Whence Upward Intrusion?
Upward tapering clastic dikes are very rare in the Touchet Beds and other Pleistocene-age deposits in the Channeled Scabland. Nearly all...
Clastic Dikes at Metalline Falls, WA
Olaf P. Jenkins took these photos in 1924 near Metalline Falls, WA. They show Pleistocene-age clastic dikes intruding rippled...
