{"id":16793,"date":"2023-02-27T15:47:40","date_gmt":"2023-02-27T14:47:40","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=16793"},"modified":"2023-02-27T15:47:40","modified_gmt":"2023-02-27T14:47:40","slug":"la-neu-i-les-roques-sedimentaries","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/la-neu-i-les-roques-sedimentaries\/","title":{"rendered":"La neu i les roques sediment\u00e0ries"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-16796 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-10-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-10.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/munt-10-150x150.jpg 150w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>Tot i haver estat, fins ara, la nit m\u00e9s freda d&#8217;aquest hivern, l&#8217;alumnat de 3r A d&#8217;ESO de l\u2019<a href=\"https:\/\/plafarreras.cat\/\">Institut Joaquima Pla i Farreras<\/a> s&#8217;ha atrevit a venir aquest dilluns 27 de febrer des de Sant Cugat del Vall\u00e8s fins a Pallej\u00e0 per realitzar una sortida de geologia i estudiar diferents afloraments de <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/geologia\/itinerari-geologic-roques-sedimentaris-batxillera\/\" target=\"_blank\" rel=\"noopener\">roques sedimentaries del Tri\u00e0sic.<\/a><\/p>\n<p>L\u2019activitat est\u00e0 plantejada com un itinerari que consta de 3 parades en diferents afloraments. En cadascun d\u2019ells han calculat les seg\u00fcents dades topogr\u00e0fiques: les coordenades UTM, l\u2019altitud i la pot\u00e8ncia dels afloraments. Tamb\u00e9 han dut a terme una s\u00e8rie de proves amb l&#8217;objectiu de classificar les diferents roques sediment\u00e0ries que anaven trobant ajudant-se d&#8217;una clau dicot\u00f2mica. Han mesurat la granulometria dels materials, la comprovaci\u00f3 de la duresa del mineral predominant en la roca i la prova de reacci\u00f3 amb HCl per confirmar o no la pres\u00e8ncia de carbonat de calci.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-16794\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/02\/1-12.jpg\" alt=\"\" width=\"168\" height=\"300\" \/>Com a resultat, han confirmat que el primer aflorament correspon a un conglomerat amb quarsita i el segon a un gres ric en quars. Aquestes dues roques rogenques d\u2019origen continental corresponen a ambients sedimentaris al\u00b7luvials del Tri\u00e0sic inferior. En l\u2019aflorament superior han identificat calc\u00e0ries i dolomies corresponents al segon estatge del Tri\u00e0sic, que indiquen unes condicions de sedimentaci\u00f3 marines. D\u2019aquesta manera han pogut confirmar la transgressi\u00f3 marina que va tenir lloc en aquella \u00e8poca.<\/p>\n<p>Han completat una gran feina de camp i han gaudit d&#8217;una manera diferent de la geologia.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tot i haver estat, fins ara, la nit m\u00e9s freda d&#8217;aquest hivern, l&#8217;alumnat de 3r A d&#8217;ESO de l\u2019Institut Joaquima Pla i Farreras s&#8217;ha atrevit a venir aquest dilluns 27 de febrer des de Sant Cugat del Vall\u00e8s fins a Pallej\u00e0 per realitzar una sortida de geologia i estudiar diferents afloraments de roques sedimentaries del [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16797,"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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