Keith Heyer Meldahl

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Keith Heyer Meldahl



Average rating: 4.45 · 512 ratings · 92 reviews · 5 distinct worksSimilar authors
Hard Road West: History and...

4.36 avg rating — 256 ratings — published 2007 — 4 editions
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Rough-Hewn Land: A Geologic...

4.54 avg rating — 221 ratings — published 2011 — 9 editions
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Surf, Sand, and Stone: How ...

4.48 avg rating — 33 ratings — published 2015 — 3 editions
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Hard Road West

it was amazing 5.00 avg rating — 2 ratings
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[Hard Road West: History an...

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“We live and we die, but we are made of sterner stuff. The carbon atoms in our fingernails, the calcium in our bones, the iron atoms in our blood -- all the countless trillions of atoms of which we are made -- are ancient objects. They existed before us, before the Earth itself, in fact. And after each of us dies, they will depart from our bodies and do other things. Forever.”
Keith Heyer Meldahl, Hard Road West: History and Geology along the Gold Rush Trail

“We live and die, but we are made of immortal stuff. The carbon atoms in our fingernails, the calcium atoms in our bones, the iron atoms in our blood—all of the countless trillions of atoms of which we are made—are ancient objects. They existed before us, before the Earth itself, in fact. And after each of us dies, they will depart from our bodies and do other things. Forever.”
Keith Heyer Meldahl, Hard Road West: History and Geology along the Gold Rush Trail

“out of the ground at nearly two times the global average. Throughout the Basin and Range, heat pours out of the crust at rates that average 50 percent higher than typical for the rest of the Earth. This tells us that hot mantle lies close to the surface below the Basin and Range. Since hot rock is inclined to rise buoyantly, it seems likely that the mantle under the Basin and Range is bulging and spreading like a growing mushroom. This hot, rising mantle both stretches the crust and sustains the high elevations. Taking advantage of the thinned and broken crust above, mantle-derived magmas have jetted upward to stain the Basin and Range landscape with innumerable lava flows and volcanic cones. So, an immense—and ongoing—outpouring of mantle heat appears to have made the Basin and Range and kept it standing high. But what made the heat? For that we turn to the Farallon Plate. IN CHAPTER 7 we saw how the subduction of the Farallon Plate”
Keith Heyer Meldahl, Hard Road West: History and Geology along the Gold Rush Trail

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The History Book ...: RECENTLY ACQUIRED BOOKS 665 887 Jun 11, 2020 04:08PM  


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