{"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":"2026-10-19T10:52:57","modified_gmt":"2026-10-19T08:52:57","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>A rock is an aggregate of minerals<\/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>Sedimentary rocks: they are formed by the accumulation of sediments deposited or stirred on the surface of the earth. We can notably mention sandstone or limestone. \u00a0 Sediments are particles composed of geological detritus (like minerals) and\/or biological detritus (like organic matter): all this forms what is called sedimentation.\nthe igneous rocks: also called igneous rocks, they are formed by cooling and then solidification of magma or lava. Solidification occurs either at depth in the form of so-called \u00ab\u00a0intrusive rocks\u00a0\u00bb (such as granite), or on the surface in the form of so-called \u00ab\u00a0extrusive rocks\u00a0\u00bb (such as basalt).<\/li>\n<li>The igneous rocks: also called igneous rocks, they are formed by cooling and then solidification of magma or lava. Solidification occurs either deep underground in the form of so-called \u201cintrusive\u201d rocks (such as granite), or on the surface in the form of \u201cextrusive\u201d rocks (such as basalt).<\/li>\n<li>Finally, metamorphic rocks: these are the result of the transformation of existing rocks into a new type of rock by what is called metamorphism. During this transformation, the rock remains in a solid state but gradually metamorphoses into a new texture and a new mineral composition. The original rock, called protolith, can be one of three types of rock: depending on the nature of the protolith and the pressure and temperature conditions experienced, the resulting metamorphic rock has a characteristic texture and chemical composition.<\/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 v28.8 - 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