{"id":3065,"date":"2017-04-27T13:21:31","date_gmt":"2017-04-27T11:21:31","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesm-jmzafra\/?p=3065"},"modified":"2017-04-27T13:21:31","modified_gmt":"2017-04-27T11:21:31","slug":"calcaria","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/inscaterinaalbert\/blogs\/museu-de-geologia\/calcaria\/","title":{"rendered":"CALC\u00c0RIA"},"content":{"rendered":"
<\/h6>\n\n\n\n
\"calcaria_bona_2nc6_v2\"<\/a><\/td>\nca<\/em>: calc\u00e0ria<\/p>\n

es<\/em>: caliza<\/p>\n

en:<\/em>\u00a0limestone<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

DESCRIPCI\u00d3:<\/strong><\/p>\n

La Calc\u00e0ria \u00e9s una roca sediment\u00e0ria, o sigui que es forma per l\u2019acumulaci\u00f3 i compactaci\u00f3 de diverses mat\u00e8ries com restes calcaris d\u2019\u00e9ssers vius o per precipitaci\u00f3 de carbonat c\u00e0lcic dissolt en aigua en un lloc amb alta concentraci\u00f3 de CO2, per aix\u00f2, cont\u00e9 m\u00e9s d\u2019un 50% de carbonat c\u00e0lcic CaCO<\/span>3.<\/span><\/p>\n

El punt feble de la Calc\u00e0ria \u00e9s que no \u00e9s soluble en aigua per\u00f2 si en \u00e0cid.<\/span><\/p>\n

Per comprovar si una pedra \u00e9s una Calc\u00e0ria se li ha de posar a sobre algun element que sigui un \u00e0cid.<\/span><\/p>\n

La majoria de les calc\u00e0ries es formen en aig\u00fces poc profundes, tranquil\u00b7les i c\u00e0lides marines. Aquest tipus d’ambient \u00e9s on els organismes capa\u00e7os de formar petxines de carbonat de calci i esquelets poden extreure f\u00e0cilment els ingredients necessaris a partir d’aigua de mar.
\nQuan aquests animals moren, la closca i restes esquel\u00e8tiques s’acumulen com sediments que podrien ser litificada en pedra calc\u00e0ria.<\/p>\n

Litificar, Diag\u00e8nesi:
\nConjunt de canvis fisicoqu\u00edmics soferts pels sediments, que es dipositen fins que formen una roca.<\/p>\n

OBSERVACI\u00d3 AMB MICROSCOPI:<\/strong><\/h6>\n

Un dia vam anar al laboratori a observar les peces <\/span><\/p>\n

(roques i minerals) amb un microscopi.<\/span><\/p>\n

A la pedra s\u2019hi veien trossos de mat\u00e8ries compactades a la\u00a0<\/span><\/p>\n

pedra. \u00a0\u00a0<\/span><\/p>\n

\"sense-titol\"<\/a><\/span><\/p>\n

\u00c8POCA GEOL\u00d2GICA:<\/strong><\/h6>\n

No en t\u00e9, perqu\u00e8 \u00e9s una pedra i no un mineral.<\/p>\n

\u00daS:<\/strong><\/h6>\n

Ha estat molt utilitzada com a roca per a la construcci\u00f3. <\/span><\/p>\n

Actualment la major part dels edificis no es construeixen amb pedra, per\u00f2 abans s\u00ed, i la calc\u00e0ria era la m\u00e9s triada perqu\u00e8 era una roca dura i resistent al sol, la pluja i els canvis de temperatura. Encara s\u2019utilitza per fer paviments i revestiments.<\/span><\/p>\n

LLOC D’ORIGEN:<\/strong><\/h6>\n

La localitat de la roca Calc\u00e0ria \u00e9s Solnhofen a Baviera, Alemanya. A Solnhofen la roca Calc\u00e0ria es va formar fa 180 milions d\u2019anys.<\/p>\n

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

Solnhofen, Alemanya. \u00c9s la localitat de la roca Calc\u00e0ria.<\/p>\n

\"foto-mapa\"<\/a><\/p>\n

 <\/p>\n

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

La pedra va pert\u00e0nyer a la col\u00b7lecci\u00f3 de l\u2019Escola Superior d\u2019agricultura que les van cedir a l\u2019Escola Dovella, que ara l\u2019han donat al nostre institut.<\/p>\n

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

http:\/\/geology.com\/rocks\/limestone.shtml<\/p>\n

http:\/\/www.xtec.cat\/~imartin6\/1\/quaderns_virtuals\/contaminacio_aire\/pluja_acida_roca_calcaria.htm<\/p>\n

http:\/\/www.enciclopedia.cat\/EC-GEC-0165734.xml<\/p>\n

LLIBRE:<\/strong><\/h6>\n

Autor: Arnoldo Mondadori Editore. Tradu\u00eft a Castell\u00e0 per Merc\u00e9 Serrano i Ferran Vallespin\u00f3s.<\/span><\/p>\n

T\u00edtol: Gu\u00eda de minerales y rocas<\/span><\/p>\n

Editorial: Grijalbo<\/span><\/p>\n

Ciutat d\u2019edici\u00f3: 1a edici\u00f3, Mil\u00e0n. 2a edici\u00f3 en castell\u00e0, Toledo.<\/span><\/p>\n

Any: 1a edici\u00f3, 1977. 2a edici\u00f3, 1980.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

ca: calc\u00e0ria es: caliza en:\u00a0limestone DESCRIPCI\u00d3: La Calc\u00e0ria \u00e9s una roca sediment\u00e0ria, o sigui que es forma per l\u2019acumulaci\u00f3 i compactaci\u00f3 de diverses mat\u00e8ries com restes calcaris d\u2019\u00e9ssers vius o per precipitaci\u00f3 de carbonat c\u00e0lcic dissolt en aigua en un lloc amb alta concentraci\u00f3 de CO2, per aix\u00f2, cont\u00e9 m\u00e9s d\u2019un 50% de carbonat c\u00e0lcic […]<\/p>\n","protected":false},"author":120,"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 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