{"id":2248,"date":"2012-10-30T22:23:41","date_gmt":"2012-10-30T22:23:41","guid":{"rendered":"http:\/\/all-geo.org\/metageologist\/?page_id=2248"},"modified":"2013-12-27T17:24:09","modified_gmt":"2013-12-27T17:24:09","slug":"eclogites","status":"publish","type":"page","link":"https:\/\/all-geo.org\/metageologist\/eclogites\/","title":{"rendered":"Eclogites"},"content":{"rendered":"<p>Eclogites are my favourite sort of rocks. They are beautiful, interesting and exotic. Sometimes they even contain (very very small) diamonds. What more could you want from a rock? Most relevantly, they tell us a lot about conditions deep inside the earth, for example <a href=\"http:\/\/all-geo.org\/metageologist\/2012\/08\/eclogite-mysterious-visitor-from-the-deep\">providing insights into deep earthquakes<\/a>.<\/p>\n<p><a href=\"http:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2012\/10\/Val-tourmanche-eclogite2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-2234\" title=\"Val-tourmanche-eclogite2\" alt=\"\" src=\"http:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2012\/10\/Val-tourmanche-eclogite2-300x234.jpg\" width=\"300\" height=\"234\" srcset=\"https:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2012\/10\/Val-tourmanche-eclogite2-300x234.jpg 300w, https:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2012\/10\/Val-tourmanche-eclogite2.jpg 925w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Eclogites are rocks of mafic composition that have been buried deeply but not heated too much &#8211; they have <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/09\/what-you-ought-to-know-about-metamorphism\/\">been metamorphosed to eclogite facies<\/a>.<\/p>\n<p>Rocks reach these conditions within subduction zones, places where oceanic crust dives back into the mantle from which it was born. I describe the incredible journey oceanic crust goes on in a pair of posts. The first <a href=\"http:\/\/all-geo.org\/metageologist\/2012\/09\/oceanic-crust-that-sinking-feeling\">traces crust from its creation in a mid-ocean ridge down to 250km depth<\/a>. Often oceanic crust doesn&#8217;t stop there but <a href=\"http:\/\/all-geo.org\/metageologist\/2012\/09\/oceanic-crust-down-to-the-core\/\">sinks all the way to the core-mantle boundary<\/a>, undergoing manymany changes on the way.<\/p>\n<p>Some eclogite does return to the surface, thank goodness. <a href=\"http:\/\/all-geo.org\/metageologist\/2012\/10\/eclogites-back-to-the-surface\/\">How does it do this?<\/a> One reason for oceanic crust to come back up may be that it contains more water than normal.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eclogites are my favourite sort of rocks. They are beautiful, interesting and exotic. Sometimes they even contain (very very small) diamonds. What more could you want from a rock? Most relevantly, they tell us a lot about conditions deep inside &hellip; <a href=\"https:\/\/all-geo.org\/metageologist\/eclogites\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-2248","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/2248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/comments?post=2248"}],"version-history":[{"count":8,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/2248\/revisions"}],"predecessor-version":[{"id":3419,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/2248\/revisions\/3419"}],"wp:attachment":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/media?parent=2248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}