The tops of clastic dikes in the megaflood region appear five ways. 1.) Truncated at a bedding contact or an erosional surface 2.)...

Here is a reprint of a short article I published in Northwest Geology v. 49 in August 2020. Northwest Geology is the annual volume of the...

"You can tell the cut of a Geologist's jib by the state of his field book." Above is a page from one of my field books showing what data...

Crosscutting relationships establish the order of events in a sheeted clastic dike exposed near TriCities, WA. 1.) Injection of yellow...

Their study consists of 83 locations in the Pasco Basin. In 1999, a group of senior geoscientists at the Hanford Nuclear Site, lead by...

The Ice Age floods inundated the southern portion of the Priest River Valley in northern Idaho, though this area is rarely mentioned in...

Pleistocene age clastic dikes in the Columbia Basin, WA grew incrementally by repeated injection of sediment into cracks. Injected...

In the summer of 2008, a movie producer with National Geographic called me from England. They needed me right away. To be clear, they...