{"id":16398,"date":"2023-01-17T21:05:32","date_gmt":"2023-01-17T20:05:32","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=16398"},"modified":"2023-01-17T21:05:32","modified_gmt":"2023-01-17T20:05:32","slug":"les-roques-sedimentaries-ens-transporten-al-triasic","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/les-roques-sedimentaries-ens-transporten-al-triasic\/","title":{"rendered":"Les roques sediment\u00e0ries ens transporten al Tri\u00e0sic"},"content":{"rendered":"<p>Dimarts 17 de gener els alumnes de batxillerat de l\u2019optativa de CTMA de l&#8217; <a href=\"https:\/\/plafarreras.cat\/\" target=\"_blank\" rel=\"noopener\"><strong>Institut Joaquima Pla i Farreras <\/strong><\/a>de Sant Cugat del Valll\u00e9s han realitzat\u00a0 una sortida de geologia a Pallej\u00e0 per estudiar diferents afloraments de <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/geologia\/itinerari-geologic-roques-sedimentaris-batxillera\/\" target=\"_blank\" rel=\"noopener noreferrer\">roques sedimentaries del Tri\u00e0sic<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16403 alignright\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/01\/IMG_0187.jpg\" alt=\"\" width=\"300\" height=\"245\" \/>Despr\u00e9s d&#8217;esperar a que escamp\u00e9s la pluja que ens ha sorpr\u00e9s s\u2019han dividit en petits grups i amb el material de camp necessari han comen\u00e7at l\u2019itinerari que consta de 3 parades en\u00a0 diferents afloraments. Han obtingut dades topogr\u00e0fiques com coordenades UTM i altitud i tamb\u00e9 han calculat el cabussament dels estrats i la pot\u00e8ncia dels afloraments fent servir diverses t\u00e8cniques matem\u00e0tiques. A m\u00e9s, en cada parada han realitzat una s\u00e8rie de proves com observaci\u00f3 d\u2019estructures sediment\u00e0ries, examen de la granulometria dels materials, comprovaci\u00f3 de la duresa del mineral que trobem en la roca per identificar-la i tamb\u00e9\u00a0 prova de la reacci\u00f3 amb\u00a0 HCl per confirmar si cont\u00e9 carbonat de calci.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16404 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/01\/IMG_0185.jpg\" alt=\"\" width=\"300\" height=\"268\" \/>Han confirmat que el primer aflorament correspon a conglomerat amb quarsita i el segon correspon a gres ric en quars. Aquestes dos litologies pertanyen al\u00a0 primer estatge del Tri\u00e0sic (Buntsandstein). <span style=\"font-family: inherit; font-size: 1em;\">S\u00f3n roques rogenques d&#8217;origen continental corresponents a ambients sedimentaris fluvials de graves i sorres que reposen sobre un s\u00f2col Paleozoic de pissarres. En l\u2019aflorament superior han identificat calc\u00e0ries corresponents al segon estatge del Tri\u00e0sic (<\/span>Muschelkalk) <span style=\"font-family: inherit; font-size: 1em;\">que indica unes condicions de sedimentaci\u00f3 marines.<br \/>\n<\/span><\/p>\n<p>Amb totes les dades recollides han pogut interpretar l\u2019origen de la seq\u00fc\u00e8ncia, que correspon a una transgressi\u00f3 marina sobre una plana al\u00b7luvial i podran elaborar la columna estratigr\u00e0fica corresponent.<\/p>\n<p>Han completat una feina magn\u00edfica aplicant \u00a0t\u00e8cniques de camp relacionades amb la geologia.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dimarts 17 de gener els alumnes de batxillerat de l\u2019optativa de CTMA de l&#8217; Institut Joaquima Pla i Farreras de Sant Cugat del Valll\u00e9s han realitzat\u00a0 una sortida de geologia a Pallej\u00e0 per estudiar diferents afloraments de roques sedimentaries del Tri\u00e0sic. Despr\u00e9s d&#8217;esperar a que escamp\u00e9s la pluja que ens ha sorpr\u00e9s s\u2019han dividit en [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16401,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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