{"id":3656,"date":"2017-04-28T11:34:57","date_gmt":"2017-04-28T09:34:57","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=3656"},"modified":"2018-06-08T13:06:40","modified_gmt":"2018-06-08T11:06:40","slug":"lava-2","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/blogs\/museu-de-geologia\/lava-2\/","title":{"rendered":"LAVA"},"content":{"rendered":"

Nom:<\/strong>
\nCastellano: Lava<\/strong>
\nCatal\u00e0: Renta
\nAngl\u00e8s: Volcanic rock
\nFranc\u00e8s: Lave<\/p>\n

Imatges:<\/strong><\/p>\n

 <\/p>\n

\"Resultat<\/p>\n

 <\/p>\n

Quin tipus i subtipus de roca i\/o mineral \u00e9s?<\/strong>
\nLes laves s\u00f3n un tipus de roques magm\u00e0tiques volc\u00e0niques o \u00edgnea de color marr\u00f3 fosc o negre.<\/p>\n

Formaci\u00f3 de la roca i\/o mineral<\/strong>
\nLes roques volc\u00e0niques s\u00f3n un tipus de roca formada quan la lava o el magma es refreden. Aquest refredament r\u00e0pid provoca que a la roca es formin cristalls petits (els anomenats microcristalls), el que d\u00f3na un aspecte similar al del vidre, com podem observar en l’obsidiana. Aix\u00f2 pot formar roques volc\u00e0niques amb una composici\u00f3 total o parcial de vidre.<\/p>\n

Composici\u00f3 qu\u00edmica<\/strong>
\nQuan el flux de lava, fluid o visc\u00f3s es crea durant una erupci\u00f3, l’aspecte de la lava i la seva composici\u00f3 no sempre s\u00f3n els mateixos.<\/p>\n

Breu descripci\u00f3 (color, textura…)<\/strong>
\nLa lava \u00e9s una roca de tipus magm\u00e0tic volc\u00e0nic de color negre o vermella\/rosa. Es formen per un r\u00e0pid refredament del magma de la superf\u00edcie terrestre o tamb\u00e9 sota del mar, i passen d\u2019una temperatura molt alta (de 700oC fins m\u00e9s de 1500oC) a la temperatura ambient, el que provoca que agafin formes rebuscades. Les laves poden dividir-se entre les que no tenen cristalls visibles a simple vista, \u00e9s a dir tenen textura afan\u00edtica, i les que tenen cristalls visibles a simple vista, \u00e9s a dir de textura faner\u00edtica. De fet, la viscositat de la lava dep\u00e8n del seu contingut en s\u00edlice (\u00f2xid de silici), si la lava cont\u00e9 molta s\u00edlice ser\u00e0 molt viscosa. Aix\u00f2 permet explicar els principals tipus de volcans,
\nels de tipus efusiu i els de tipus explosiu.<\/p>\n

Usos i\/o aplicacions<\/strong>
\nLa lava convertida en pedres volc\u00e0niques t\u00e9 m\u00faltiples usos per a les persones. Per exemple, en la construcci\u00f3 s’utilitza per elaborar un formig\u00f3 especial o com a a\u00efllant t\u00e8rmic, i en la jardineria com a decoraci\u00f3.<\/p>\n

Lloc d’origen (Jaciments m\u00e9s importants)<\/strong>
\nEls volcans
\nRefer\u00e8ncia bibliogr\u00e0fica<\/strong>
\nhttps:\/\/ca.wikipedia.org\/wiki\/Lava
\nhttps:\/\/ingeoexpert.com\/rocas-volcanicas\/<\/p>\n","protected":false},"excerpt":{"rendered":"

Nom: Castellano: Lava Catal\u00e0: Renta Angl\u00e8s: Volcanic rock Franc\u00e8s: Lave Imatges:     Quin tipus i subtipus de roca i\/o mineral \u00e9s? Les laves s\u00f3n un tipus de roques magm\u00e0tiques volc\u00e0niques o \u00edgnea de color marr\u00f3 fosc o negre. Formaci\u00f3 de la roca i\/o mineral Les roques volc\u00e0niques s\u00f3n un tipus de roca formada quan […]<\/p>\n","protected":false},"author":185,"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 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":[361,362],"class_list":["post-3656","post","type-post","status-publish","format-standard","hentry","category-museu-de-geologia","tag-2nc5","tag-magmatica"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3656","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\/185"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/comments?post=3656"}],"version-history":[{"count":4,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3656\/revisions"}],"predecessor-version":[{"id":9962,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/posts\/3656\/revisions\/9962"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/media?parent=3656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/categories?post=3656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/wp-json\/wp\/v2\/tags?post=3656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}