{"id":3633,"date":"2010-06-25T12:45:00","date_gmt":"2010-06-25T12:45:00","guid":{"rendered":"http:\/\/all-geo.org\/highlyallochthonous\/2010\/06\/yellowstone-it-was\/"},"modified":"2010-06-25T12:45:00","modified_gmt":"2010-06-25T12:45:00","slug":"yellowstone-it-was","status":"publish","type":"post","link":"https:\/\/all-geo.org\/highlyallochthonous\/2010\/06\/yellowstone-it-was\/","title":{"rendered":"Yellowstone it was"},"content":{"rendered":"

\"A<\/span>Give yourselves a pat on the back: virtually everyone guessed<\/a> correctly that my fortnight away was chiefly spent exploring Yellowstone National Park<\/a>, bookended by some time in Grand Teton National Park<\/a> just next door. The first photo I showed you was of a dead tree standing in a growing expanse of silica deposited by a nearby hot spring*. The spring in question is the Grand Prismatic Spring, which is the third largest hot spring in the world, and even looks pretty from space<\/a>.<\/p>\n

\"P6080019.JPG\"\/<\/p>\n

\"grand<\/p>\n

\"grand
The Grand Prismatic Spring<\/b><\/p>\n

The second photo is of a rhyolite lava flow in the Firehole Canyon. Rhyolite lavas are extremely viscous, as illustrated nicely by the intensely deformed flow banding in this outcrop – it hasn’t so much flowed, as oozed. This flow occured within the Yellowstone caldera some time after it was excavated by the last big explosive eruption 640,000 years ago.<\/p>\n

\"Firehole<\/p>\n

\"Firehole<\/p>\n

Perhaps it was pretty obvious in hindsight – but I didn’t expect you all to be all so North America-centric that you wouldn’t guess one of the world’s other geothermal areas. Maybe the pine trees were too much of a giveaway. Regardless, I saw plenty of awesome geology whilst I was away – and I’m planning to share the highlights with you all over the next few weeks.
\n*incidentally, I may just have a big hole in my mineralogical knowledge (which is entirely possible), but I swear I’ve never heard hydrothermally deposited silica referred to as ‘geyserite’ before. Is this usage limited to North America, perhaps?<\/p>\n","protected":false},"excerpt":{"rendered":"

Give yourselves a pat on the back: virtually everyone guessed correctly that my fortnight away was chiefly spent exploring Yellowstone National Park, bookended by some time in Grand Teton National Park just next door. The first photo I showed you … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,25,26,12],"tags":[208],"class_list":["post-3633","post","type-post","status-publish","format-standard","hentry","category-geology","category-outcrops","category-photos","category-volcanoes","tag-yellowstone-hydrothermal-hot-spring-rhyolite-lava-flow"],"_links":{"self":[{"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/posts\/3633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/comments?post=3633"}],"version-history":[{"count":0,"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/posts\/3633\/revisions"}],"wp:attachment":[{"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/media?parent=3633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/categories?post=3633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/all-geo.org\/highlyallochthonous\/wp-json\/wp\/v2\/tags?post=3633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}