{"id":23245,"date":"2025-05-08T16:03:15","date_gmt":"2025-05-08T14:03:15","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=23245"},"modified":"2025-05-12T10:17:17","modified_gmt":"2025-05-12T08:17:17","slug":"experts-en-sedimentaries","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/experts-en-sedimentaries\/","title":{"rendered":"Experts en sediment\u00e0ries"},"content":{"rendered":"

\"\"Aquest dimecres 7 de maig 2025, l\u2019alumnat de 1r de batxillerat de l\u2019Institut Frederic Mompou <\/a>de Sant Vicen\u00e7 dels Horts ha vingut a Pallej\u00e0 per estudiar tres afloraments diferents de roques sediment\u00e0ries del Tri\u00e0sic.<\/a><\/p>\n

L’objectiu de la sortida \u00e9s reconstruir tant la hist\u00f2ria geol\u00f2gica d\u2019aquests dip\u00f2sits com els seus ambients sedimentaris. L\u2019activitat est\u00e0 plantejada com un itinerari circular amb 3 parades diferenciades. En cadascuna d\u2019elles han pres nota de les coordenades UTM, de l\u2019altitud i, a partir una s\u00e8rie de proves anal\u00edtiques, han aconseguit identificar les diferents roques que han anat trobant, ajudant-se d\u2019una clau dicot\u00f2mica. Han mesurat la pot\u00e8ncia, la granulometria, les estructures sediment\u00e0ries observables en els materials i la seva duresa. Fins i tot han atacat cada mostra amb \u00e0cid clorh\u00eddric (HCl) dilu\u00eft al 10% per detectar-hi la pres\u00e8ncia de carbonat de calci.<\/p>\n

\"\"<\/p>\n

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, a l\u2019aflorament superior han identificat roques calc\u00e0ries amb alguns f\u00f2ssils 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

Han completat una gran feina de camp i han gaudit d\u2019una manera diferent de la geologia.<\/p>\n

Enhorabona i fins aviat!<\/p>\n","protected":false},"excerpt":{"rendered":"

Aquest dimecres 7 de maig 2025, l\u2019alumnat de 1r de batxillerat de l\u2019Institut Frederic Mompou de Sant Vicen\u00e7 dels Horts ha vingut a Pallej\u00e0 per estudiar tres afloraments diferents de roques sediment\u00e0ries del Tri\u00e0sic. L’objectiu de la sortida \u00e9s reconstruir tant la hist\u00f2ria geol\u00f2gica d\u2019aquests dip\u00f2sits com els seus ambients sedimentaris. L\u2019activitat est\u00e0 plantejada com […]<\/p>\n","protected":false},"author":3,"featured_media":23249,"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":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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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