Wedged between the temperate rain forests of western Washington and the evergreen forests of northern Idaho lies a mostly barren region of scab-shaped rock formations, massive cliffs of columnar basalt, and trough-like valleys known as coulees. The region is hot in summer, bitter in winter, and windy much of the year. For many, it is an area to be driven across quickly en route to somewhere else. But if you stop and investigate – read road signs, visit small museums — you’ll uncover a most fantastic tale of a cataclysm that transformed a region and, within that tale, of a geologist who stuck to his theories in spite of the scorn of his peers.

Palouse River
Once upon a time:
Geological research provides evidence of enthralling sagas that have taken place on our planet, and none is more enthralling than that of the Ice Age Floods of the Inland Northwest. The story began during the last ice age, some 10,000 to 20,000 years ago. The climate was much colder then, and a vast ice sheet extended south from today’s Canada. A portion of the ice dammed the Clark Fork River in northern Idaho, forming Glacial Lake Missoula, some 2,000 feet deep and roughly the size of lakes Ontario and Erie combined. Eventually, rising water broke the ice dam. A wall of water hundreds of feet high surged over the region, sounding like thunder and resounding like mini-earthquakes. The water carried along ice, rocks, soil, and anything else that got in its path, scouring land from today’s northern Idaho, eastern and central Washington, and northern Oregon in its journey to the sea.

[Wikipedia Commons]
I told you so:
In the 1920s, Bretz hiked among the strange formations of the Columbia River Plateau in central and eastern Washington. Born and raised in Michigan, he had received a Ph.D. in geology from the University of Chicago and was in eastern Washington doing field research. In 1923, he published a paper arguing that the channels snaking through the region’s barren landscape could be the result of catastrophic flooding in a not-all-that-distant past. The paper was the opening salvo of more than four decades of debate that pitted Bretz and one or two others against the geology establishment of the time, the Ivy League elite. Not only did those august men reject the hypothesis that the landforms were the result of a deluge of Biblical proportions, they also rejected the Midwestern outsider himself. However, by the 1970s growing evidence and a greater understanding of ice age forces gave credence to Bretz’s theories, and his hand-drawn maps of the region proved uncannily similar to later satellite imagery. The establishment nay-sayers had to eat crow. In 1979, at the ripe old age of 96, Bretz received the Geology Society of America’s highest award. By then, he told his son, “All my enemies are dead, so I have no one to gloat over.”

Columnar basalt
The wondrous formations:
Evidence of the flooding can be seen throughout eastern Washington. Drive on the highways and byways east and southeast of Spokane and you’ll see gargantuan bluffs and troughs and plunge pools that seem more fitting on the moon or Mars than Earth. In the next post we’ll look at the most monumental of these formations.
To learn more, type in ‘channeled scablands’ or ‘J. Harlen Bretz’ online, and you’ll find a wealth of information. If you prefer an in-depth look, I recommend Glacial Lake Missoula and Its Humongous Floods by David Alt, published by Mountain Press; and Bretz’s Flood: The Remarkable Story of a Rebel Geologist and the World’s Greatest Flood by John Soennichsen, published by Sasquatch Books.



























However, if you get off the interstate and look more closely, you see something else. Low evergreen mountains in the distance encircle much of the city. As in Valdivia, Chile, a river runs through it, the Spokane River, somersaulting in a wild series of waterfalls past downtown. The yesteryear brick buildings have their own classic charm, and many now house breweries, wineries, boutique stores, and upscale restaurants.


