{"id":2949,"date":"2017-04-27T13:21:32","date_gmt":"2017-04-27T11:21:32","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=2949"},"modified":"2017-04-27T13:21:32","modified_gmt":"2017-04-27T11:21:32","slug":"bomba-volcanica","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/blogs\/museu-de-geologia\/bomba-volcanica\/","title":{"rendered":"BOMBA VOLC\u00c0NICA"},"content":{"rendered":"

 <\/p>\n\n\n\n
\"bombavolcanica_2c2_fotobona\"<\/a><\/td>\nca:<\/em> \u00a0Bomba Magm\u00e0tica
\nes:<\/em> \u00a0Bomba Magm\u00e1tica
\nen:<\/em> \u00a0Pump Magma<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
<\/h6>\n
DESCRIPCI\u00d3<\/strong><\/h6>\n

Una Bomba Magm\u00e0tica ( piroclasts ) \u00e9s un gl\u00f2bul de roca fosa que es forma quan un volc\u00e0 entra en erupci\u00f3 i ho expulsa fragments viscosos. Aquestes pedres poden ser expulsades a una dist\u00e0ncia de varius kil\u00f2metres des d’on van ser expulsades. Durant el vol, les m\u00e9s fluides solen adquirir formes aerodin\u00e0miques. Si l’exterior de la pedra es solidifica durant el vol, es pot esquerdar i fa que l’esquerda s’expandeixi per dins i es trenqui
\nNo se sap des de quan fa que existeix, per\u00f2 deu ser des de fa ja molt\u00edssims anys ja que aquesta pedra ni existiria si no hagu\u00e9s existit algun volc\u00e0. Els volcans son necessaris ja que com havia dit, son l’origen de la seva exist\u00e8ncia.<\/p>\n

OBSERVACI\u00d3 AMB LUPA<\/strong><\/h6>\n
\"foto-con-lupa\"<\/a>\u00daS<\/strong><\/h6>\n

Normalment, s\u2019utilitza per a l\u2019obtenci\u00f3 de clor per a la fabricaci\u00f3 de lleixiu i pl\u00e0stics. Tamb\u00e9 s\u2019utilitza per a la conservaci\u00f3 de certs aliments. Es fan servir grans quantitats per afavorir el desgla\u00e7 de les carreteres i carrers a l\u2019hivern.<\/p>\n

MAPA<\/strong><\/h6>\n

Aquesta pedra ve d\u2019Olot. Olot, \u00e9s la capital de la comarca de la Garrotxa. T\u00e9 bastants parcs naturals, i t\u00e9 un museu dels volcans on, segurament, hauran trobat all\u00e0 la Bomba Volc\u00e0nica que tenim a classe ara. Parcialment, Olot \u00e9s conegut pel seu inter\u00e9s natural. Tenen una gran majoria de volcans, tots ells extingits, per\u00f2 hi han dos molt famosos. Un d\u2019ells, fam\u00f3s perqu\u00e8 la carretera est\u00e0 tallada i s\u2019aprec\u00eda els seus estrats geol\u00f2gics. M\u00e9s abaix, hi ha un Jard\u00ed Bot\u00e0nic de Vegetaci\u00f3.\"mapa-de-la-pedra\"<\/a><\/p>\n

 <\/p>\n

LLOC D’ORIGEN<\/strong><\/h6>\n

No te exactament cap lloc d\u2019origen ja que aquesta pedra est\u00e0 all\u00e0 on hi hagi un volc\u00e0, encara que nom\u00e9s la veur\u00edem despr\u00e9s d\u2019una explosi\u00f3 volc\u00e0nica. M\u00e9s o menys, aquestes pedres estarien tamb\u00e9 formant part del volc\u00e0 encara que no es pugui veure tal i com es fins al moment de l\u2019erupci\u00f3.<\/p>\n

PROCED\u00c8NCIA<\/strong><\/h6>\n

Aquesta pedra l\u2019han portat els professors d\u2019una botiga de records del Museu de Volcans d\u2019Olot. La vam trobar junt a altres m\u00e9s en una capsa de pl\u00e0stic amb un petit tro\u00e7 de paper on posava el seu nom i que va ser trobada i declarada per Espanya.<\/p>\n

REFER\u00c8NCIES BIBLIOGR\u00c0FIQUES<\/strong><\/h6>\n

No he fet servir especialment ninguna web exepte el Xtec, el Yahoo per algun petit dubte que tenia i no trovaba a altres llocs, i una altre web que no recordo. En els llibres no vaig trobar gaire informaci\u00f3 aix\u00ed que em vaig fiar de altres webs diferents. Tamb\u00e9 vaig fer servir el GEOflaix, de la Universitat de Barcelona.<\/p>\n

DOCUMENT GENERAL<\/strong><\/h6>\n

Bomba Volc\u00e1nica.<\/p>\n

FITXA REALITZADA PER<\/strong><\/h6>\n

\u00c0gata Padull\u00e9s, Carla Fons, Kristina Uliyanova, Fabian Perez. Febrer 2017 2nC ESO<\/p>\n","protected":false},"excerpt":{"rendered":"

  ca: \u00a0Bomba Magm\u00e0tica es: \u00a0Bomba Magm\u00e1tica en: \u00a0Pump Magma DESCRIPCI\u00d3 Una Bomba Magm\u00e0tica ( piroclasts ) \u00e9s un gl\u00f2bul de roca fosa que es forma quan un volc\u00e0 entra en erupci\u00f3 i ho expulsa fragments viscosos. Aquestes pedres poden ser expulsades a una dist\u00e0ncia de varius kil\u00f2metres des d’on van ser expulsades. Durant el […]<\/p>\n","protected":false},"author":111,"featured_media":0,"comment_status":"closed","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":"","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[321],"tags":[339,362],"class_list":["post-2949","post","type-post","status-publish","format-standard","hentry","category-museu-de-geologia","tag-2c2","tag-magmatica"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/2949","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/users\/111"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/comments?post=2949"}],"version-history":[{"count":4,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/2949\/revisions"}],"predecessor-version":[{"id":4288,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/2949\/revisions\/4288"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/media?parent=2949"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/categories?post=2949"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/tags?post=2949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}