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Geo 891: Lost Lake Basin and Hogg Rock The basin the the foreground fills with water during late winter into spring, then slowly drains into the ground over the summer- there is no surface outlet. I've thought for years that Hogg Rock, in the back, looked like a tuya- a subglacial volcanic landform- in terms of its shape, and a couple months ago, I was informed by Adam Kent, a volcanologist at Oregon State, that it is.

Over the past year, there have been a number of stories in Oregon news sources about Lost Lake's "drain hole," starting with one in the Bend Bulletin. Even though I had never stopped here before, I was able to get a general sense of its location from the shape of the landscape in photos accompanying the articles. However Hollie and Gary had visited the site previously, so we didn't have to search it out. Nevertheless, my "general sense" turned out to be quite accurate. We're looking pretty much right at it, but from this angle, it's hidden in the grass and willows.

The countless dead trees on and around Hogg Rock were killed in a nasty fire a few years ago.

Posted by Lockwood at 1:50 PM Labels: Geo Series, Geology, Oregon, OSU, Volcanoes


