Donald W. Hyndman
Auteur de Roadside Geology of Oregon
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Œuvres de Donald W. Hyndman
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Roadside Geology of Montana par Don Hyndman
I don’t normally review guidebooks unless I’ve done the routes suggested, and my travels in Montana have been limited to the area around Yellowstone National Park. However, this one is good enough that I’m inspired to head north and look around. There should be plenty of interest; the Yellowstone hot spot, Glacier National Park, lots of ghost towns, the Hell Creek fossils, and so on. It seems like every small town in eastern Montana has its own dinosaur museum; I’ve always wanted to visit a state and work my way through every county museum, and Montana seems like a good place to start.… (plus d'informations)
½2 
setnahkt | Oct 22, 2020 |
setnahkt | Oct 22, 2020 | 
We recently went on a geology-heavy trip around Oregon, and this book proved to be a fantastic reference for the most part. The main downsides were that it was a little hard to pinpoint specific areas, as it covered fixed routes, and there were some that weren't addressed. It also was quite dated--there were passages in there that referred to Mount St. Helens without making note of the cataclysmic 1980 eruption! Still, I'd recommend the Roadside Geology series to anyone making similar trips.
The authors are very keen on the idea that the Yellowstone hot spot was caused by a meteor impact, over which the North American plate has now moved, and which was also responsible for the Columbia flood basalts and the genesis of the Basin and Range province. Hmm. I can almost buy it, particularly given that seismic tomography has shown the Yellowstone hot spot to be unexpectedly shallow, but still.
Kind of a historical thing. The book was published after the recognition of shocked quartz and iridium in the Cretaceous-Paleogene boundary, but before the Chixulub crater in Yucatan was discovered. The authors speculate that the Deccan Traps mark the impact that ended the Cretaceous. Apparently this theory is not quite dead today, though the impact origin of the Shiva feature off the west coast of India is debated. There does seem to be an indication of a cluster of large impacts at about the right time, so it's faintly possible Chixulub was only part of the story.
Otherwise, a pretty good book, with some nice explanation of accretionary wedges from subduction zones. (There are some very old such features in Idaho from when the West Coast was just west of Boise.) Also a bit on mining, which surprised me by not ranting about the irresponsibility of using the cyanide method.… (plus d'informations)
Kind of a historical thing. The book was published after the recognition of shocked quartz and iridium in the Cretaceous-Paleogene boundary, but before the Chixulub crater in Yucatan was discovered. The authors speculate that the Deccan Traps mark the impact that ended the Cretaceous. Apparently this theory is not quite dead today, though the impact origin of the Shiva feature off the west coast of India is debated. There does seem to be an indication of a cluster of large impacts at about the right time, so it's faintly possible Chixulub was only part of the story.
Otherwise, a pretty good book, with some nice explanation of accretionary wedges from subduction zones. (There are some very old such features in Idaho from when the West Coast was just west of Boise.) Also a bit on mining, which surprised me by not ranting about the irresponsibility of using the cyanide method.… (plus d'informations)
-made travel less boring, a great service
-one example of several like this I've read
-one example of several like this I've read
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Statistiques
- Œuvres
- 18
- Membres
- 1,269
- Popularité
- #20,211
- Évaluation
- 3.7
- Critiques
- 11
- ISBN
- 31