{"id":24196,"date":"2025-11-10T13:08:37","date_gmt":"2025-11-10T12:08:37","guid":{"rendered":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/?p=24196"},"modified":"2025-11-10T13:13:12","modified_gmt":"2025-11-10T12:13:12","slug":"repte-superat-les-escletxes","status":"publish","type":"post","link":"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/general\/repte-superat-les-escletxes\/","title":{"rendered":"REPTE superat: Les Escletxes"},"content":{"rendered":"<p>Divendres 7 de novembre l&#8217;alumnat de la mat\u00e8ria\u00a0 &#8220;Reptes en Biologia i Geologia&#8221; de primer de batxillerat de l&#8217;<a href=\"https:\/\/insernestlluch.cat\/\">Institut Ernest Lluch<\/a> de Barcelona ha superat el Repte! Han sobreviscut a <a href=\"http:\/\/www.xtec.cat\/cda-cansantoi\/Escletxes_bat.PDF\">Les escletxes del Papiol<\/a> i han realitzat una tasca de caracteritzaci\u00f3 dels riscos geol\u00f2gics de la zona.<\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-24208\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/muntatge-267x300.jpg\" alt=\"\" width=\"267\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/muntatge-267x300.jpg 267w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/muntatge.jpg 518w\" sizes=\"auto, (max-width: 267px) 100vw, 267px\" \/>En primer lloc han reflexionat i formulat diverses hip\u00f2tesis al voltant d&#8217;aquesta formaci\u00f3 geol\u00f2gica integrada dins la Serra de Collserola catalogada com a<a href=\"https:\/\/mediambient.gencat.cat\/web\/.content\/home\/ambits_dactuacio\/patrimoni_natural\/sistemes_dinformacio\/inventari_despais_dinteres_geologic\/consulta_de_les_fitxes_descriptives_dels_eig\/documentos\/338_descrip.pdf\" target=\"_blank\" rel=\"noopener\"> ge\u00f3top d&#8217;inter\u00e8s<\/a>. A continuaci\u00f3 l&#8217;han situat geogr\u00e0ficament amb el GPS, han copsat el relleu de la zona i han diferenciat els materials superiors dels inferiors que es veien a simple vista. Agrupats en 2 equips de treball i amb el material que els hem proporcionat (martell de ge\u00f2leg, ulleres de protecci\u00f3, \u00e0cid clorh\u00eddric i aigua)\u00a0 <span style=\"font-family: inherit; font-size: 1em;\">han treballat de valent per analitzar la consist\u00e8ncia, la resist\u00e8ncia, la impermeabilitat, la ductilitat i la pres\u00e8ncia de carbonats en ambd\u00f3s materials<\/span><span style=\"font-family: inherit; font-size: 1em;\">. Ni els ha calgut la clau dicot\u00f2mica per identificar els materials superiors com a calc\u00e0ries fossil\u00edferes (amb coralls i conquilles) i els inferiors com a lutites (argiles). Tamb\u00e9 han vist com representar aquest informaci\u00f3 en una columna estratigr\u00e0fica.<\/span><\/p>\n<p style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-24209 alignleft\" src=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/IMG_7997bis-225x300.jpg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/IMG_7997bis-225x300.jpg 225w, https:\/\/serveiseducatius.xtec.cat\/cda-cansantoi\/wp-content\/uploads\/usu1385\/2025\/11\/IMG_7997bis.jpg 300w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/>Despr\u00e9s d&#8217;una pausa per esmorzar s&#8217;han posat el casc de protecci\u00f3 i s&#8217;han endinsat en 6 escletxes principals per prendre diferents mesures: direcci\u00f3, inclinaci\u00f3 de les parets, profunditat i despla\u00e7aments (horitzontal i vertical). Amb totes les dades recollides\u00a0 han pogut elaborar un model te\u00f2ric de com s\u2019havien pogut formar aquestes cingleres tan peculiars. Entre tots han arribat a la seg\u00fcent conclusi\u00f3: com que les roques calc\u00e0ries es degraden a causa de l&#8217;aigua de la pluja (lleugerament \u00e0cida), al llarg de milions d\u2019anys s&#8217;han anat esquerdant completament fins a les argiles inferiors. Quan plou, l&#8217;aigua s&#8217;infiltra fins a les argiles, es tornen fangoses i es comporten de manera pl\u00e0stica. Aix\u00f2, juntament amb el pendent del vessant, hauria provocat que les calc\u00e0ries llisquessin vessant avall fins a formar el fenomen geol\u00f2gic que veiem avui dia.<\/p>\n<p style=\"text-align: justify;\">Tenint en compte l&#8217;impacte que t\u00e9 aquest fenomen natural a les infraestructures del poble del Papiol, han valorat el risc que suposa aquest proc\u00e9s de vessant per les fa\u00e7anes de les cases i altres construccions, tenint en compte el cost dels b\u00e9ns exposats, la vulnerabilitat i la probabilitat dels danys o per\u00edode de retorn (perillositat).<\/p>\n<p style=\"text-align: justify;\">Han gaudit molt passant d&#8217;una esquerda a una altra mentre aprenien sobre geologia.<\/p>\n<p style=\"text-align: justify;\">Han sigut uns\u00a0 investigadors\/es formidables! L&#8217;enhorabona per la feina feta! Fins ben aviat futurs cient\u00edfics!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Divendres 7 de novembre l&#8217;alumnat de la mat\u00e8ria\u00a0 &#8220;Reptes en Biologia i Geologia&#8221; de primer de batxillerat de l&#8217;Institut Ernest Lluch de Barcelona ha superat el Repte! Han sobreviscut a Les escletxes del Papiol i han realitzat una tasca de caracteritzaci\u00f3 dels riscos geol\u00f2gics de la zona. En primer lloc han reflexionat i formulat diverses [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":24210,"comment_status":"open","ping_status":"open","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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