The Future Cascades
<p>There will no doubt come a time when I have the good fortune of picking up where I left off in the Cascade Volcanic Arc, doubling back to revisit missed mountains, pushing further North to answer the beckoning call of British Columbia. That may be soon. Or it may not be for many years. But, what I can say is that the concept of many years on a human time scale is piddling in terms of deep, geologic time whence processes play out over the course of hundreds of thousands, if not millions of years.</p>
<p>The volcanoes of the Cascade Volcanic Arc have formed over seven million years. Many have been deformed by explosions, both ancient — as in the case of Mount Tehama & Mazama — and modern — as in the case of Lassen Peak and Mt. St. Helens. But all are still active, which is due to the ongoing subduction of the Juan de Fuca and Explorer plate under the North American Plate.</p>
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