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The Geology Post! Grand Coulee Edition
Jun. 21st, 2013 10:12 amSince one person liked the idea of a geology post, I made this long and rambly post laden with photos and links.
Okay, geology. I love geology, and took a bunch of classes in college. That said, I am terrible at identifying rocks, but I love them anyway. Geology is as close as we're going to get to a time machine to the far past. It's one age influencing another. The past shapes the present and the present changes the past. A humble stream bed, dry for eons, is all that's needed to divert a river and carve a canyon.
I'm particularly interested in the Channeled Scablands, aka most of Eastern Washington. They were carved by massive floods into layer after layer of flood basalt, and are pretty much as close as we'll get to certain Martian terrains here on earth. (1)
My favorite part is Glacial Lake Missoula, which was created when an ice age glacier dammed the Clark Fork River and flooded much of Western Montana's steep valleys. I like it because I like imagining myself underneath this huge, cold lake filled with icebergs whenever I visit my grandparents. I like imagining the whole system breathing as the water rises, breaks the ice dam, and pours out, rushing through the plains, pauses to pond behind the Wallula Gap, then rush through the gap and the Columbia Gorge, pause again in the Willamette Valley, and then rush on to the sea. Then the glacier kept moving forward, and the cycle started again.
( Read more... )
Okay, geology. I love geology, and took a bunch of classes in college. That said, I am terrible at identifying rocks, but I love them anyway. Geology is as close as we're going to get to a time machine to the far past. It's one age influencing another. The past shapes the present and the present changes the past. A humble stream bed, dry for eons, is all that's needed to divert a river and carve a canyon.
I'm particularly interested in the Channeled Scablands, aka most of Eastern Washington. They were carved by massive floods into layer after layer of flood basalt, and are pretty much as close as we'll get to certain Martian terrains here on earth. (1)
My favorite part is Glacial Lake Missoula, which was created when an ice age glacier dammed the Clark Fork River and flooded much of Western Montana's steep valleys. I like it because I like imagining myself underneath this huge, cold lake filled with icebergs whenever I visit my grandparents. I like imagining the whole system breathing as the water rises, breaks the ice dam, and pours out, rushing through the plains, pauses to pond behind the Wallula Gap, then rush through the gap and the Columbia Gorge, pause again in the Willamette Valley, and then rush on to the sea. Then the glacier kept moving forward, and the cycle started again.
( Read more... )
