The definitive article on clastic dikes in Eastern Washington. Origin, age, character, and distribution are discussed. Data driven research.

Near field (blue) and far field (red) hydrofracture curves shown. During the hydrofracture period, fluid pressure drops as fractures...

Left and middle: A synthetic hydraulic fracture produced in Jell-O using a stainless steel straw and colored syrup. Right: A natural one...

Clastic Dikes in Miocene Basalt Sheeted dikes with sandy fills intrude downward into Miocene Columbia River Basalt in the Walla Walla...

Shear stress at the base of the overriding flow is transmitted to the substrate, forming these structures. Soupy and clay-rich substrate...

Directions - From Othello, drive north on Hwy 17 and turn R (east) on Hwy 170/Rd 8 SE at the '76 gas station toward Warden. Follow for...

At Indian Creek, WA I discovered 3 breccia-filled sills injected into varved Glacial Lake Columbia sediments, each extending for more...

Coarse Grained Layers Behave as Efficient Pathways - Coarse grained layers appear to behave as efficient pathways during propagation of...

An excellent outcrop located along Touchet River Road North, some 13 miles north of Touchet, WA exposes two sets of clastic dikes. The...

Incremental growth of a sheeted clastic dike occurs over time, megaflood by megaflood. The figure above shows the growth of a composite...