Rochas
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Transcript of Rochas
![Page 1: Rochas](https://reader038.fdocumentos.tips/reader038/viewer/2022110312/55babf40bb61eb2c528b47db/html5/thumbnails/1.jpg)
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Formam-se quando o magma em fusãoarrefece e solidifica. Se arrefecerapidamente, os minerais não têm tempode se desenvolverem originando rochasVulcânicas (basalto).Se, pelo contrário, o magma arrefecelentamente, permite a cristalização ecrescimento de todos os minerais (granito).
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O granito é muito abundante em Portugal,
existe especialmente na zona norte do
país. Na pré-história era utilizado na
construção de dolméns ou antas .
Actualmente é muito utilizado como
rochas ornamentais, em fachadas de
prédios, bancadas para as cozinhas,
tampos de mesa, podendo também ser
usadas no calcetamente de ruas, muros,
etc.
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São rochas que resultam da alteração de outras rochas devido à pressão ou à temperatura.
Possuem determinadas propriedades para serem utilizadas como material para revestimento em diversas aplicações: pisos, paredes, bancadas, pias, balcões, mesas, estátuas, etc.
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O mármore
![Page 20: Rochas](https://reader038.fdocumentos.tips/reader038/viewer/2022110312/55babf40bb61eb2c528b47db/html5/thumbnails/20.jpg)
a ardósia
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Uma casa de banho forrada a mármore e ardósia
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O quartzito
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F i m
Trabalho realizado pela
profª Fátima Aragão