{"id":2830,"date":"2026-08-10T09:23:16","date_gmt":"2026-08-10T07:23:16","guid":{"rendered":"https:\/\/www.minesparis.psl.eu\/musee\/?page_id=2830"},"modified":"2026-08-10T09:23:16","modified_gmt":"2026-08-10T07:23:16","slug":"rocks","status":"publish","type":"page","link":"https:\/\/www.minesparis.psl.eu\/musee\/en\/the-museum\/collections-eng\/rocks\/","title":{"rendered":"Rocks"},"content":{"rendered":"\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<h2><strong>The rock collection at the museum<\/strong><\/h2>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container bloc-50-50\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-6\">\n\t\t\t<p style=\"text-align: justify\">From a rich collection of more than (number of samples), the rocks are gathered in their dedicated room: Room F. Despite their small size, rocks are very important in industry.<\/p>\n\t\t<\/div>\n\t\t<div class=\"col-md-6\">\n\t\t\t<p style=\"text-align: justify\">Today, although mineralogy courses have been discontinued at the Paris School of Mines, the collections continue to grow. Welcoming the public and sharing knowledge are central to the Museum&rsquo;s mission, as is research. Minerals, a topical subject, are omnipresent in our society (food, clothing, connected devices).<\/p>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container bloc-70-30\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-8\">\n\t\t\t<h3 style=\"text-align: justify\"><strong>What is a rock and how is it defined?<\/strong><\/h3>\n<ul style=\"text-align: justify\">\n<li>Une roche est un agr\u00e9gat de min\u00e9raux<\/li>\n<\/ul>\n<p style=\"text-align: justify\">\n\t\t<\/div>\n\t\t<div class=\"col-md-4\">\n\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<hr \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n<div class=\"container bloc-30-70\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-4\">\n\t\t\t\t\t<\/div>\n\t\t<div class=\"col-md-8\">\n\t\t\t<h3><strong>Rocks are organized in three families:<\/strong><\/h3>\n<ul>\n<li>les roches s\u00e9dimentaires : elles sont form\u00e9es par l&rsquo;accumulation de s\u00e9diments d\u00e9pos\u00e9s ou remu\u00e9s \u00e0 la surface de la terre. On peut notamment citer le gr\u00e8s ou bien le calcaire. \u00a0Les s\u00e9diments sont des particules compos\u00e9es de d\u00e9tritus g\u00e9ologiques ( comme des min\u00e9raux ) et\/ ou de d\u00e9tritus biologiques ( comme de la mati\u00e8re organique ) : tout cela forme ce qu&rsquo;on appelle la s\u00e9dimentation.<\/li>\n<li>les roches magmatiques : aussi appel\u00e9s roches ign\u00e9es , elles sont form\u00e9es par refroidissement puis solidification de magma ou de lave. La solidification se fait soit en profondeur sous formes de roches dites \u00ab\u00a0intrusives\u00a0\u00bb ( comme le granite) , ou bien bien \u00e0 la surface sous formes de roches dites \u00ab\u00a0extrusives\u00a0\u00bb ( comme le basalte).<\/li>\n<li>Enfin , les roches m\u00e9tamorphiques : ces derni\u00e8res sont le r\u00e9sultat de la transformations de roches existantes en un nouveau type de roches par ce que l&rsquo;on appelle le m\u00e9tamorphisme. Lors de cette transformation , la roche reste sous l&rsquo;\u00e9tat solide mais se m\u00e9tamorphose petit \u00e0 petit en une nouvelle texture ainsi qu&rsquo;une nouvelle composition min\u00e9rale. La roche originelle , appel\u00e9e protolithe , peut \u00eatre l&rsquo;un des trois types de roches : suivant la nature du protolithe et des conditions de pression et de temp\u00e9ratures subies , la roche m\u00e9tamorphique r\u00e9sultant de ce processus poss\u00e8de une texture et une composition chimique caract\u00e9ristique.<\/li>\n<\/ul>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<hr \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container bloc-70-30\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-8\">\n\t\t\t<h3><strong>A few rocks at the museum<\/strong><\/h3>\n\t\t<\/div>\n\t\t<div class=\"col-md-4\">\n\t\t\t\t\t<\/div>\n\t<\/div>\n<\/div>\n\n\n<div class=\"container block-full-largeur\">\n\t<div class=\"row mt-4\">\n\t\t<div class=\"col-md-12\">\n\t\t\t<hr \/>\n\t\t<\/div>\n\t<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":4,"featured_media":937,"parent":2724,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-2830","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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