{"id":16850,"date":"2023-03-07T22:23:14","date_gmt":"2023-03-07T21:23:14","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=16850"},"modified":"2023-03-07T22:23:14","modified_gmt":"2023-03-07T21:23:14","slug":"viatjant-en-el-temps-a-traves-de-les-roques","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/viatjant-en-el-temps-a-traves-de-les-roques\/","title":{"rendered":"Viatjant en el temps a trav\u00e9s de les roques"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-16854 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/03\/munt-3-300x300.jpg\" alt=\"\" width=\"223\" height=\"223\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/03\/munt-3.jpg 300w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/03\/munt-3-150x150.jpg 150w\" sizes=\"auto, (max-width: 223px) 100vw, 223px\" \/><span style=\"font-family: inherit; font-size: 1em;\">L&#8217;alumnat de 3r B d&#8217;ESO de l\u2019<\/span><a style=\"font-family: inherit; font-size: 1em;\" href=\"https:\/\/plafarreras.cat\/\">Institut Joaquima Pla i Farreras<\/a><span style=\"font-family: inherit; font-size: 1em;\"> de Sant Cugat han vingut aquest dimarts 7 de mar\u00e7 fins a Pallej\u00e0 per estudiar, a partir de tres afloraments diferents, <a href=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/ambits\/geologia\/itinerari-geologic-roques-ambient-sedimentaris-eso\/\">les roques sediment\u00e0ries<\/a> i reconstruir tant la hist\u00f2ria geol\u00f2gica d&#8217;aquests dip\u00f2sits com els seus ambients.<\/span><\/p>\n<p>L\u2019activitat est\u00e0 plantejada com un itinerari i consta de 3 parades. En cadascuna d&#8217;elles han pres nota de les coordenades UTM, l\u2019altitud i, a partir una s\u00e8rie de proves anal\u00edtiques, han aconseguit identificar les diferents roques sediment\u00e0ries que han anat trobat, ajudant-se d&#8217;una clau dicot\u00f2mica. Han mesurat la pot\u00e8ncia, la granulometria, les estructures sediment\u00e0ries observables en els materials, la seva duresa i fins i tot han atacat cada mostra amb HCl dilu\u00eft, per detectar-hi la pres\u00e8ncia de carbonat de calci.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright  wp-image-16853\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2023\/03\/3.jpg\" alt=\"\" width=\"346\" height=\"194\" \/>Amb totes aquestes dades, han concl\u00f2s que el primer aflorament corresponia a un conglomerat i el segon a un gres. Aquestes dues roques rogenques d\u2019origen continental corresponen a ambients sedimentaris al\u00b7luvials del Tri\u00e0sic inferior. En canvi, en l\u2019aflorament superior han identificat calc\u00e0ries i dolomies, que indicaven unes condicions de sedimentaci\u00f3 marines. D\u2019aquesta manera han pogut confirmar la transgressi\u00f3 marina que hi va tenir lloc en aquella \u00e8poca i reconstruir la hist\u00f2ria geol\u00f2gica a partir del principi de superposici\u00f3 dels estrats.<\/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>L&#8217;alumnat de 3r B d&#8217;ESO de l\u2019Institut Joaquima Pla i Farreras de Sant Cugat han vingut aquest dimarts 7 de mar\u00e7 fins a Pallej\u00e0 per estudiar, a partir de tres afloraments diferents, les roques sediment\u00e0ries i reconstruir tant la hist\u00f2ria geol\u00f2gica d&#8217;aquests dip\u00f2sits com els seus ambients. L\u2019activitat est\u00e0 plantejada com un itinerari i consta [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":16852,"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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