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Origins of Clastic Dikes Flowchart

Keying out clastic dikes in the field can be difficult. Click on image for larger PDF.

Last 50 Posts

Sedimentary Facies of Scabland Deposits

Reese Coulee - Walla Walla Valley, WA

Two Terminal Moraines in Mission Valley, MT

I.C. Russell's Reconnaissance in Central Washington, 1892

Dual Sport Riding Gear for Montana

Calcrete: Friends of the Pleistocene PNW Cell 2023 - Photos from Field Trip to Eastern WA

Calcrete Growth in Alluvial Lowlands - New Findings in Eastern Washington State

Sheeted Clastic Dikes in the Megaflood Region

Near- and Far-Field Hydrofracture in the Formation of Sheeted Clastic Dikes

Giant Current Ripples at Omak, WA

Geology at the Colville River Mouth - Lake Roosevelt, WA

Paleoseismic Trenches in Eastern Washington

Ancient Flood Gravel Beneath a Thick Calcrete Ledge - White Bluffs, WA

Fracture Notes - In progress

New Artwork - Winter 2023

Calcrete Field Trip 2023 - Hendricks Road at Eagle Lakes, WA

Calcrete-Capped Megaflood Gravel - George, WA

Clastic Dikes Literature Relevant to Eastern Washington 1820-2020

Dune Fields of the Upper Columbia River Region, WA

Fault Scarp or Ranch Road? Review of USGS paleoseismic trench near Wallula, WA

Great Terrace of the Columbia #1 - The Explorers

Great Terrace of the Columbia #2 - The Geologists

Correlating Measured Sections - White Bluffs, WA

Harder Road - Calcrete Over pre-Wisconsin Flood Gravel

Hydraulic Fractures are Simple & Efficient

Clastic Dikes: The Tops of Clastic Dikes

Clastic Dikes: Sand Dikes Intruding Bedrock

Clastic Dikes in Eastern Washington: Formed by Lateral Spreading?

Clastic Dikes: Dispelling a Periglacial Origin

Clastic Dikes: Whence Upward Intrusion?

Before Bretz

Lind Coulee Fault near O'Sullivan Dam - Potholes Reservoir, WA

Roald Fryxell: My spirit animal

Repeated Soft Sediment Deformation - Lake Rufus Woods, WA

Periglacial Soil Wedges East of Glacier National Park

Clastic Dikes at Metaline Falls, WA

Pleistocene(?) Alluvial Stratigraphy - Lind Coulee, WA

Tetons Drive

Structureless Sandstone Beds - White Bluffs, WA

Diatomite Lake Invaded by Molten Lava - Frenchman Hills, WA

Old Maid Coulee Site Geology - Connell, WA

Baja 2022: Places We Visited

Dry Hollow Site Geology near Clyde, WA

A North Slope Field Geologist c. 1919

Two Lines in Motorcycle Design - Norden 901 & KTM 990

Sanpoil-style Syn-sedimentary Deformation

Linear Surface Anomalies - Bennington, ID

Slide Planes, Mud Squirts & Diamicts in Upper Grand Coulee

Calcrete Field Trip 2021 - Stokrose Gravel Pit

Calcrete Field Trip 2021 - Overview

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