{"id":55,"date":"2011-12-01T14:11:43","date_gmt":"2011-12-01T14:11:43","guid":{"rendered":"http:\/\/cms.impact-structures.com\/?p=55"},"modified":"2011-12-01T14:11:43","modified_gmt":"2011-12-01T14:11:43","slug":"rubielos-de-la-cerida-impact-structure-spain-impact-melt-glass-from-the-central-uplift","status":"publish","type":"post","link":"https:\/\/estructuras-de-impacto.impact-structures.com\/?p=55","title":{"rendered":"Rubielos de la C\u00e9rida impact structure (Spain): impact melt glass from the central uplift"},"content":{"rendered":"<table id=\"AutoNumber1\" width=\"100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"5\">\n<tbody>\n<tr>\n<td valign=\"top\"><span style=\"font-family: 'Trebuchet MS', Helvetica, Geneva, Swiss, SunSans-Regular;\"><a href=\"http:\/\/www.impaktstrukturen.de\/origi\/052.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.impact-structures.com\/images\/a_glass_Rubielos_structurek.jpg\" alt=\"\" width=\"200\" height=\"150\" border=\"0\" \/><\/a>\u00a0A<\/span><\/td>\n<td valign=\"top\"><span style=\"font-family: 'Trebuchet MS', Helvetica, Geneva, Swiss, SunSans-Regular;\"><a href=\"http:\/\/www.impaktstrukturen.de\/origi\/053.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.impact-structures.com\/images\/b_glass_12xk.jpg\" alt=\"\" width=\"200\" height=\"158\" border=\"0\" \/><\/a>\u00a0B<\/span><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" valign=\"top\">The glass shown in A, B (B: the field is 14 mm wide) is coating a sandstone exposed in the central uplift of the Rubielos de la C\u00e9rida impact structure. The glass has a greenish to whitisch color and is transparent to milky. In thin section (C, D (xx nicols) &#8211; the field is 6 mm wide), the sandstone shows heavily damaged, and intense cataclastic flow texture is observed to merge with the glass. Quartz grains are strongly fractured and show multiple sets of planar fractures (PFs) and planar deformation features (PDFs).<\/td>\n<\/tr>\n<tr>\n<td valign=\"top\" width=\"50%\"><span style=\"font-family: 'Trebuchet MS', Helvetica, Geneva, Swiss, SunSans-Regular;\"><a href=\"http:\/\/www.impact-structures.com\/images\/c_thinsection_II.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.impact-structures.com\/images\/c_k.jpg\" alt=\"\" width=\"200\" height=\"143\" border=\"0\" \/><\/a>\u00a0C<\/span><\/td>\n<td valign=\"top\" width=\"50%\"><span style=\"font-family: 'Trebuchet MS', Helvetica, Geneva, Swiss, SunSans-Regular;\"><a href=\"http:\/\/www.impaktstrukturen.de\/origi\/d_thinsection_xx.jpg\" target=\"_blank\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.impact-structures.com\/images\/d_thinsection_xxk.jpg\" alt=\"\" width=\"199\" height=\"141\" border=\"0\" \/><\/a>\u00a0D<\/span><\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\" valign=\"top\">Interpretation: Despite the occurrence of shock features in the sandstone, the glass probably did not form by shock melting. We suggest frictional melting by extreme dynamic metamorphism in the impact event (excavation or &#8211; more probably &#8211; modification stage when the uplift formed) and the glass to be pseudotachylite. Temperatures in excess of 2,000 \u00b0C were probably required for the homogenization of this glass (David Griscom, pers. com.).<br \/>\nThe location of this spectacular exposure of the glass-bearing sandstone remains secret for the moment in order to prevent it from destruction by rock hunters.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0A \u00a0B The glass shown in A, B (B: the field is 14 mm wide) is coating a sandstone exposed in the central uplift of the Rubielos de la C\u00e9rida impact structure. The glass has a greenish to whitisch color and is transparent to milky. In thin section (C, D (xx nicols) &#8211; the field &hellip; <a href=\"https:\/\/estructuras-de-impacto.impact-structures.com\/?p=55\" class=\"more-link\">Continuar leyendo<span class=\"screen-reader-text\"> \u00abRubielos de la C\u00e9rida impact structure (Spain): impact melt glass from the central uplift\u00bb<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-55","post","type-post","status-publish","format-standard","hentry","category-impact-highlights"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Rubielos de la C\u00e9rida impact structure (Spain): impact melt glass from the central uplift - ERNSTSON CLAUDIN ESTRUCTURAS DE IMPACTO - CR\u00c1TERES METEOR\u00cdTICOS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/estructuras-de-impacto.impact-structures.com\/?p=55\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rubielos de la C\u00e9rida impact structure (Spain): impact melt glass from the central uplift - ERNSTSON CLAUDIN ESTRUCTURAS DE IMPACTO - CR\u00c1TERES METEOR\u00cdTICOS\" \/>\n<meta property=\"og:description\" content=\"\u00a0A \u00a0B The glass shown in A, B (B: the field is 14 mm wide) is coating a sandstone exposed in the central uplift of the Rubielos de la C\u00e9rida impact structure. The glass has a greenish to whitisch color and is transparent to milky. 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