{"id":12330,"date":"2020-07-11T10:01:52","date_gmt":"2020-07-11T08:01:52","guid":{"rendered":"https:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=12330"},"modified":"2021-09-16T13:13:43","modified_gmt":"2021-09-16T11:13:43","slug":"un-tauro-gegant-prehistoric-a-linstitut","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/general\/un-tauro-gegant-prehistoric-a-linstitut\/","title":{"rendered":"Un taur\u00f3 gegant prehist\u00f2ric a l\u2019institut"},"content":{"rendered":"

\"\"<\/a><\/strong><\/p>\n

Uns\/es professors\/es de ci\u00e8ncies han trobat una espectacular dent de C.megalodon<\/strong><\/p>\n

La troballa l\u2019han fet aquests dies de juliol mentre revisaven la immensa col\u00b7lecci\u00f3 de roques, minerals i f\u00f2ssils provinent de l\u2019Escola Superior d\u2019Agricultura de Catalunya (podeu llegir l’article “Hist\u00f2ria d’alguna de les peces del Museu de Geologia<\/a>“).<\/p>\n

Aquesta pe\u00e7a no estava identificada de cap manera i cal suposar que en algun moment dels 100 anys d\u2019hist\u00f2ria de la col\u00b7lecci\u00f3, alg\u00fa hi va afegir aquest incisiu de Carcharocles megalodon. La dent, d\u2019uns 13 cm d\u2019al\u00e7ada, encara conserva el perfil serrat que devia servir per mossegar i tallar a les seves preses.<\/p>\n

\"\"<\/a>Sembla que aquesta esp\u00e8cie de taur\u00f3 va dominar els oceans fa uns 15 milions d\u2019anys i que es va extingir degut als canvis clim\u00e0tics per refredament de les aig\u00fces durant les diverses glaciacions.<\/p>\n

Com que l\u2019esquelet dels taurons \u00e9s cartilagin\u00f3s, molt dif\u00edcilment deixa f\u00f2ssils, per tant l\u2019\u00fanic rastre que n\u2019ha deixat s\u00f3n aquests magn\u00edfics f\u00f2ssils de dents (dentalium en diuen els arque\u00f2legs).<\/p>\n

\"\"<\/a>A partir d\u2019aquestes dents, diversos autors han dedu\u00eft, amb certa controv\u00e8rsia, la grand\u00e0ria de l\u2019animal que sembla que faria entre 10 i 18 metres de llargada; cal recordar que el fam\u00f3s taur\u00f3 blanc actual fa \u00abnom\u00e9s\u00bb uns 6 metres! En foto adjunta s\u2019aprecia que les dents del taur\u00f3 blanc actual semblen joguines al costat d\u2019una dent de C. megalodon.<\/p>\n

\"\"<\/a>Semblaria una pel\u00b7l\u00edcula de ci\u00e8ncia-ficci\u00f3, per\u00f2 podem pensar en aquest animal com una variant carn\u00edvora i encara m\u00e9s gran, del tamb\u00e9 gegant per\u00f2 inofensiu taur\u00f3-balena actual.<\/p>\n

Us l\u2019imagineu?<\/p>\n","protected":false},"excerpt":{"rendered":"

Uns\/es professors\/es de ci\u00e8ncies han trobat una espectacular dent de C.megalodon La troballa l\u2019han fet aquests dies de juliol mentre revisaven la immensa col\u00b7lecci\u00f3 de roques, minerals i f\u00f2ssils provinent de l\u2019Escola Superior d\u2019Agricultura de Catalunya (podeu llegir l’article “Hist\u00f2ria d’alguna de les peces del Museu de Geologia“).<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","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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