{"id":3077,"date":"2024-02-08T08:30:00","date_gmt":"2024-02-08T11:30:00","guid":{"rendered":"https:\/\/museuweg.net\/blog\/?p=3077"},"modified":"2026-02-09T15:48:36","modified_gmt":"2026-02-09T18:48:36","slug":"cratons","status":"publish","type":"post","link":"https:\/\/museuweg.net\/blog\/cratons\/","title":{"rendered":"Cr\u00e1tons: a biblioteca f\u00f3ssil da Terra\u00a0"},"content":{"rendered":"\n<p>Descubra o fascinante mundo dos <strong>cr\u00e1tons<\/strong>, verdadeiras bibliotecas f\u00f3sseis que guardam os segredos da hist\u00f3ria da Terra ao longo de centenas de milhares de anos.&nbsp;&nbsp;<\/p>\n\n\n\n<p>Essas estruturas geol\u00f3gicas antigas, formadas nos per\u00edodos Pr\u00e9-Cambriano, Proterozoico e Arqueozoico, revelam um panorama \u00fanico da evolu\u00e7\u00e3o do nosso planeta.&nbsp;<\/p>\n\n\n\n<p>A seguir, vamos explorar n\u00e3o apenas o que s\u00e3o os cr\u00e1tons, mas tamb\u00e9m como se formam e o que essas estruturas terrestres est\u00e1veis s\u00e3o capazes de revelar sobre o passado e o presente.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Leia tamb\u00e9m:<\/strong> <a href=\"https:\/\/museuweg.net\/blog\/dia-do-paleontologo-conheca-a-profissao\/#content\" target=\"_blank\" rel=\"noreferrer noopener\">Dia do paleont\u00f3logo: conhe\u00e7a a profiss\u00e3o!<\/a>&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O que s\u00e3o os cr\u00e1tons?<\/strong><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/O-que-sao-os-cratons_.png\" alt=\"O que s\u00e3o os cr\u00e1tons\" class=\"wp-image-3080\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/O-que-sao-os-cratons_.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/O-que-sao-os-cratons_-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/O-que-sao-os-cratons_-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Os cr\u00e1tons s\u00e3o formados por duas estruturas geol\u00f3gicas distintas: os escudos cristalinos, tamb\u00e9m conhecidos como maci\u00e7os antigos, e as bacias sedimentares, conhecidas tamb\u00e9m como plataformas continentais.&nbsp;<\/p>\n\n\n\n<p>Essas \u00e1reas apresentam uma riqueza geol\u00f3gica not\u00e1vel, abrigando materiais met\u00e1licos como ferro, cobre, estanho, prata, alum\u00ednio, entre outros.&nbsp;<\/p>\n\n\n\n<p>Os escudos cristalinos que comp\u00f5em uma parte dos cr\u00e1tons se formam, predominantemente, pela eros\u00e3o de rochas \u00edgneas ou magm\u00e1ticas. Originam-se, em grande parte, da solidifica\u00e7\u00e3o do magma terrestre resultante das atividades vulc\u00e2nicas.&nbsp;<\/p>\n\n\n\n<p>Por outro lado, as bacias sedimentares s\u00e3o estruturas que se configuram pelo ac\u00famulo e pela deposi\u00e7\u00e3o de sedimentos, que t\u00eam como origem \u00e1reas montanhosas antigas que foram erodidas, desgastadas pelo tempo e depositadas nas regi\u00f5es dos cr\u00e1tons.&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Leia tamb\u00e9m: <\/strong><a href=\"https:\/\/museuweg.net\/blog\/a-ciencia-explica-por-que-terremotos-acontecem\/#content\" target=\"_blank\" rel=\"noreferrer noopener\">A Ci\u00eancia Explica: por que terremotos acontecem?<\/a>&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>O que podemos encontrar dentro dos cr\u00e1tons?<\/strong><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>No interior dos cr\u00e1tons, encontramos uma diversidade de rochas, destacando-se as \u00edgneas, as sedimentares, as metam\u00f3rficas e, por vezes, verdadeiros tesouros f\u00f3sseis.&nbsp;<\/p>\n\n\n\n<p>Essa variabilidade proporciona uma leitura detalhada dos eventos que moldaram a Terra ao longo da sua hist\u00f3ria. Descubra a seguir, as diferen\u00e7as entre os tipos de rocha.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Rochas \u00edgneas<\/strong><\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-igneas.png\" alt=\"Rochas \u00edgneas\" class=\"wp-image-3083\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-igneas.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-igneas-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-igneas-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>S\u00e3o formadas principalmente pela solidifica\u00e7\u00e3o do magma terrestre, exemplificadas por rochas como granito, que desempenham papel crucial na estrutura\u00e7\u00e3o dos cr\u00e1tons.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Rochas sedimentares<\/strong>\u00a0<\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-sedimentares.png\" alt=\"Rochas sedimentares\" class=\"wp-image-3085\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-sedimentares.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-sedimentares-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-sedimentares-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>S\u00e3o resultantes da deposi\u00e7\u00e3o de sedimentos, como o arenito, e essenciais para entendermos a din\u00e2mica das antigas bacias sedimentares associadas aos cr\u00e1tons.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Rochas metam\u00f3rficas<\/strong><\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-metamorficas.png\" alt=\"Rochas metam\u00f3rficas\" class=\"wp-image-3084\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-metamorficas.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-metamorficas-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-metamorficas-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Essas rochas surgem da transforma\u00e7\u00e3o de outras rochas sob press\u00e3o e temperatura intensas, sendo o m\u00e1rmore um exemplo not\u00e1vel dentro da rica geologia dos cr\u00e1tons.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Rochas f\u00f3sseis<\/strong><\/h3>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-fosseis.png\" alt=\"Rochas f\u00f3sseis\" class=\"wp-image-3082\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-fosseis.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-fosseis-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Rochas-fosseis-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Por sua vez, as rochas f\u00f3sseis s\u00e3o como c\u00e1psulas do tempo, pois preservam vest\u00edgios de formatos de vida antigas e adicionam uma dimens\u00e3o biol\u00f3gica \u00e0s narrativas geol\u00f3gicas dos cr\u00e1tons.\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Qual \u00e9 a relev\u00e2ncia do estudo dos cr\u00e1tons para a geologia?<\/strong><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"600\" src=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Qual-a-relevancia-do-estudo-dos-cratons-para-a-geologia.png\" alt=\"Qual a relev\u00e2ncia do estudo dos cr\u00e1tons para a geologia\" class=\"wp-image-3081\" srcset=\"https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Qual-a-relevancia-do-estudo-dos-cratons-para-a-geologia.png 1024w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Qual-a-relevancia-do-estudo-dos-cratons-para-a-geologia-300x176.png 300w, https:\/\/museuweg.net\/blog\/wp-content\/uploads\/2024\/02\/Qual-a-relevancia-do-estudo-dos-cratons-para-a-geologia-768x450.png 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>A geologia \u00e9 a ci\u00eancia que investiga a composi\u00e7\u00e3o, a estrutura, os processos e a hist\u00f3ria da Terra. Para essa ci\u00eancia, os cr\u00e1tons desempenham um papel fundamental porque servem n\u00e3o apenas como registros geol\u00f3gicos \u2013 s\u00e3o aut\u00eanticos documentos que proporcionam uma vis\u00e3o sobre a evolu\u00e7\u00e3o do planeta.&nbsp;<\/p>\n\n\n\n<p>O estudo dos cr\u00e1tons \u00e9 essencial para a geologia, pois permite a determina\u00e7\u00e3o da idade do planeta, a reconstru\u00e7\u00e3o da hist\u00f3ria dos continentes, a an\u00e1lise das mudan\u00e7as clim\u00e1ticas ao longo do tempo e a investiga\u00e7\u00e3o das origens da vida na Terra.&nbsp;<\/p>\n\n\n\n<p>Assim, al\u00e9m de contarem a hist\u00f3ria da Terra, oferecem perspectivas valiosas para que possamos compreender o presente e antecipar o nosso futuro geol\u00f3gico.&nbsp;<br>&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Leia tamb\u00e9m: <\/strong><a href=\"https:\/\/museuweg.net\/blog\/qual-e-a-composicao-da-lua-por-que-ela-muda-de-forma-e-tamanho-conheca-algumas-curiosidades\/#content\" target=\"_blank\" rel=\"noreferrer noopener\">Qual \u00e9 a composi\u00e7\u00e3o da lua? Por que ela muda de forma e tamanho? Conhe\u00e7a algumas curiosidades<\/a>&nbsp;<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Acompanhe o Museu WEG e fique atualizado!<\/strong><\/h2>\n\n\n\n<p><\/p>\n\n\n\n<p>Ao desbravarmos os cr\u00e1tons, mergulhamos em uma narrativa geol\u00f3gica que transcende o tempo. O O seu estudo revela mais do que os segredos da Terra \u2013 abre portas para in\u00fameras descobertas.&nbsp;<\/p>\n\n\n\n<p>Perspectivas futuras prometem desvendar ainda mais mist\u00e9rios, e convidamos voc\u00ea a <a href=\"https:\/\/www.instagram.com\/museuweg\/\" target=\"_blank\" rel=\"noreferrer noopener\">seguir o Instagram do Museu WEG<\/a> para se manter atualizado sobre assuntos relevantes nas \u00e1reas da ci\u00eancia e da tecnologia, al\u00e9m de outras fascinantes hist\u00f3rias sobre o universo.\u00a0\u00a0<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>Fontes:<\/strong>&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/super.abril.com.br\/coluna\/deriva-continental\/cratons-a-caixa-preta-da-nave-terra\/\" target=\"_blank\" rel=\"noreferrer noopener\">Cr\u00e1tons: a caixa-preta da nave Terra &#8211; Superinteressante<\/a>&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/brasilescola.uol.com.br\/geografia\/cratons.htm\" target=\"_blank\" rel=\"noreferrer noopener\">Cr\u00e1tons: o que s\u00e3o, forma\u00e7\u00e3o e classifica\u00e7\u00e3o &#8211; Brasil Escola<\/a>&nbsp;<\/p>\n\n\n\n<p><a href=\"https:\/\/www.researchgate.net\/publication\/223618157_Dynamics_of_cratons_in_an_evolving_mantle\" target=\"_blank\" rel=\"noreferrer noopener\">Din\u00e2mica de cratons em um manto em evolu\u00e7\u00e3o \u2013 Research Gate<\/a>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Descubra os segredos dos cr\u00e1tons, a sua forma\u00e7\u00e3o, os tipos de rochas e a import\u00e2ncia dessas bibliotecas f\u00f3sseis para a geologia.<\/p>\n","protected":false},"author":4,"featured_media":3079,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,603],"tags":[12,907],"class_list":["post-3077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia-2","category-curiosidades","tag-ciencia","tag-geografia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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