{"id":332,"date":"2011-10-08T15:19:42","date_gmt":"2011-10-08T15:19:42","guid":{"rendered":"http:\/\/all-geo.org\/metageologist\/?page_id=332"},"modified":"2011-12-14T21:33:05","modified_gmt":"2011-12-14T21:33:05","slug":"metamorphism","status":"publish","type":"page","link":"https:\/\/all-geo.org\/metageologist\/metamorphism\/","title":{"rendered":"Metamorphism"},"content":{"rendered":"<p><a href=\"http:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2011\/10\/cropped-Sillimanite.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-357\" title=\"cropped Sillimanite\" src=\"http:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2011\/10\/cropped-Sillimanite-300x255.jpg\" alt=\"\" width=\"300\" height=\"255\" srcset=\"https:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2011\/10\/cropped-Sillimanite-300x255.jpg 300w, https:\/\/all-geo.org\/metageologist\/wp-content\/uploads\/2011\/10\/cropped-Sillimanite-1024x871.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>My posts on metamorphism form a sequence. I start with what anyone ought to know, the core concepts of <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/09\/what-you-ought-to-know-about-metamorphism\/\">metamorphic facies and how we estimate conditions of metamorphism<\/a>. Next I cover the concepts of <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/09\/metamorphism-grade-zones-index-minerals-and-whisky\/\">grade, zones, index minerals and Barrovian metamorphism<\/a>. What useful things can metamorphic rocks tell us? Well <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/10\/metamorphism-pressure-temperature-time-paths\/\">Pressure-Temperature-time paths<\/a> are useful things to know, and can be related to tectonic conditions such as mountain-building or subduction. What about the business of <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/10\/thermobarometry-quantifying-metamorphic-conditions\/\">quantifying the conditions of metamorphism, thermobarometry<\/a>, is it really witchcraft? Looking at complications to thermobarometry, <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/10\/metamorphism-evolving-ideas\/\">how easy is it to achieve chemical equlibrium<\/a> and <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/11\/metamorphism-open-or-closed\/\">is metamorphism really closed<\/a>? Looking at work on the cutting edge, how can we use <a href=\"http:\/\/all-geo.org\/metageologist\/2011\/12\/geospeedometry-how-fast-is-metamorphism\/\">geospeedometry<\/a>\u00a0to put the t in P-T-t?<\/p>\n<p>Originally these posts started out as a short note in a blog post about the <a href=\"http:\/\/all-geo.org\/erratics\/2011\/03\/impacts-and-geology-deep-peace\/\">Vredefort impact structure<\/a>. I was talking about the amazing things metamorphic petrologists had discovered \u00a0and wanted to quickly summarise how they got their results. My quick summary soon turned into a post of its own, and then split off into multiple posts.<\/p>\n<p>I&#8217;ve been encouraged to write these post by an off-the-cuff remark from\u00a0<a href=\"http:\/\/freethoughtblogs.com\/entequilaesverdad\">Dana Hunter<\/a> (and her inspiring post &#8220;<a href=\"http:\/\/freethoughtblogs.com\/entequilaesverdad\/2011\/09\/14\/adorers-of-the-good-science-of-rock-breaking\">Adorers of the Good Science of Rock-breaking<\/a>&#8220;).\u00a0\u00a0\u00a0I learnt my metamorphic petrology 15+ years ago and I wanted to write about what is left in my memory. Not the chemical formula of staurolite, but the <strong>interesting stuff <\/strong>&#8211;\u00a0understanding, not just knowledge. An <a href=\"http:\/\/pascals-puppy.blogspot.com\/2011\/10\/wedge-whaddya-wanna-know.html\">excellent post by MK<\/a> (part of the education themed <a href=\"http:\/\/all-geo.org\/highlyallochthonous\/2011\/10\/wisdom-from-the-geoblogosphere-school-of-learning-doing-accretionary-wedge-38\/\">Accretionary Wedge #38<\/a>) gave me a name for this, <strong>the scaffolding.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>My posts on metamorphism form a sequence. I start with what anyone ought to know, the core concepts of metamorphic facies and how we estimate conditions of metamorphism. Next I cover the concepts of grade, zones, index minerals and Barrovian &hellip; <a href=\"https:\/\/all-geo.org\/metageologist\/metamorphism\/\">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-332","page","type-page","status-publish","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/332","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=332"}],"version-history":[{"count":16,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/332\/revisions"}],"predecessor-version":[{"id":358,"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/pages\/332\/revisions\/358"}],"wp:attachment":[{"href":"https:\/\/all-geo.org\/metageologist\/wp-json\/wp\/v2\/media?parent=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}