{"id":4327,"date":"2022-06-10T16:00:00","date_gmt":"2022-06-10T16:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/djibouti\/politique\/dou-vient-le-sable-des-plages"},"modified":"2022-06-10T16:50:28","modified_gmt":"2022-06-10T16:50:28","slug":"dou-vient-le-sable-des-plages","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages","title":{"rendered":"D&rsquo;o\u00f9 vient le sable des plages ?"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Djibouti. <\/strong><\/span>Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu&rsquo;il y en a de moins en mois sur Terre et sur nos plages ?<\/p>\n<p>Le sable des plages est ce que l&rsquo;on appelle une roche s\u00e9dimentaire d\u00e9tritique. En effet, les plages sont form\u00e9es par l&rsquo;accumulation de grains (quartz, oxydes de fer, fragments carbonat\u00e9s&#8230;) issus principalement de l&rsquo;\u00e9rosion des roches continentales et de la remobilisation des stocks anciens.<\/p>\n<p><b>Les diverses origines des sables<\/b><\/p>\n<p>Le sable commun, constitu\u00e9 de grains de quartz, est form\u00e9 par l&rsquo;\u00e9rosion des roches sous l&rsquo;effet de l&rsquo;eau, de la temp\u00e9rature et du vent puis est transport\u00e9 par les fleuves ou les vents.<\/p>\n<p>Parfois, il s&rsquo;est accumul\u00e9 il y a tr\u00e8s longtemps dans des dunes ou des plages fossiles, lorsque le niveau de la mer \u00e9tait plus bas, durant la glaciation du Quaternaire par exemple. Le sable a ensuite \u00e9t\u00e9 remobilis\u00e9 lors des temp\u00eates pour venir s&rsquo;\u00e9chouer sur les plages.<\/p>\n<p>Certains sables, enfin, sont d&rsquo;origine organique. C&rsquo;est le cas du sable blanc des atolls, compos\u00e9 de fragments de coraux, de coquillages et de squelettes d&rsquo;organismes.<\/p>\n<p><b>De moins en moins de sable sur nos plages<\/b><\/p>\n<p>Le probl\u00e8me est que de plus en plus de sable est extrait, pour la construction notamment, et que de moins en moins de sable arrive dans les mers \u00e0 cause des barrages et de la lutte contre l&rsquo;\u00e9rosion des berges et des dunes. Cette carence en sable fait r\u00e9gresser les plages et participe \u00e0 leur recul et \u00e0 leur disparition.<\/p>\n<p>Une plage illumin\u00e9e aux Maldives Sur une \u00eele des Maldives se trouve une plage hors du commun. Le jour, rien d\u2019exceptionnel, si on oublie un instant son sable fin et ses eaux turquoises\u2026 Mais la nuit, ce sont des millions d\u2019organismes microscopiques qui peuvent venir s\u2019accumuler le long de la rive. De minuscules crustac\u00e9s baptis\u00e9s ostracodes, semble-t-il. Ceux-ci poss\u00e8dent un organe bioluminescent qui fait scintiller l\u2019eau de mer au gr\u00e9 du mouvement des vagues. Un spectacle aux allures surnaturelles mais 100 % naturel ! \u00a9 veert12, Shutterstock<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/djibouti\">Djibouti<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Djibouti. Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu&rsquo;il y en a de moins en mois sur Terre et sur nos plages ? Le sable des plages est ce que l&rsquo;on appelle une roche s\u00e9dimentaire d\u00e9tritique. En effet, les plages sont form\u00e9es par l&rsquo;accumulation de grains [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":4326,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[36,49,50],"class_list":["post-4327","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-djibouti","tag-djibouti"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>D&#039;o\u00f9 vient le sable des plages ? - Djibouti<\/title>\n<meta name=\"description\" content=\"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu&#039;il y en a de moins en mois sur T ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D&#039;o\u00f9 vient le sable des plages ?\" \/>\n<meta property=\"og:description\" content=\"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu&#039;il y en a de moins en mois sur T ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\" \/>\n<meta property=\"og:site_name\" content=\"Djibouti\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-10T16:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-06-10T16:50:28+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1685\" \/>\n\t<meta property=\"og:image:height\" content=\"1053\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"D&rsquo;o\u00f9 vient le sable des plages ?\",\"datePublished\":\"2022-06-10T16:00:00+00:00\",\"dateModified\":\"2022-06-10T16:50:28+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\"},\"wordCount\":382,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Djibouti\",\"Djibouti\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\",\"url\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\",\"name\":\"D'o\u00f9 vient le sable des plages ? - Djibouti\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg\",\"datePublished\":\"2022-06-10T16:00:00+00:00\",\"dateModified\":\"2022-06-10T16:50:28+00:00\",\"author\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"description\":\"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu'il y en a de moins en mois sur T ...\",\"breadcrumb\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage\",\"url\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg\",\"contentUrl\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg\",\"width\":1685,\"height\":1053,\"caption\":\"D'o\u00f9 vient le sable des plages ?\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/www.africa-press.net\/djibouti\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"D&#8217;o\u00f9 vient le sable des plages ?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#website\",\"url\":\"https:\/\/www.africa-press.net\/djibouti\/\",\"name\":\"Djibouti\",\"description\":\"Just another Africa News Agency Sites site\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.africa-press.net\/djibouti\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\",\"name\":\"cfeditorfr\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"D'o\u00f9 vient le sable des plages ? - Djibouti","description":"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu'il y en a de moins en mois sur T ...","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages","og_locale":"fr_FR","og_type":"article","og_title":"D'o\u00f9 vient le sable des plages ?","og_description":"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu'il y en a de moins en mois sur T ...","og_url":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages","og_site_name":"Djibouti","article_published_time":"2022-06-10T16:00:00+00:00","article_modified_time":"2022-06-10T16:50:28+00:00","og_image":[{"width":1685,"height":1053,"url":"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg","type":"image\/jpeg"}],"author":"cfeditorfr","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"cfeditorfr","Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#article","isPartOf":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages"},"author":{"name":"cfeditorfr","@id":"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"headline":"D&rsquo;o\u00f9 vient le sable des plages ?","datePublished":"2022-06-10T16:00:00+00:00","dateModified":"2022-06-10T16:50:28+00:00","mainEntityOfPage":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages"},"wordCount":382,"commentCount":0,"image":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg","keywords":["Africa Press","Africa Press-Djibouti","Djibouti"],"articleSection":["Divers","homepage-french","Toutes les actualit\u00e9s"],"inLanguage":"fr-FR","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages","url":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages","name":"D'o\u00f9 vient le sable des plages ? - Djibouti","isPartOf":{"@id":"https:\/\/www.africa-press.net\/djibouti\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage"},"image":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage"},"thumbnailUrl":"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg","datePublished":"2022-06-10T16:00:00+00:00","dateModified":"2022-06-10T16:50:28+00:00","author":{"@id":"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1"},"description":"Le sable sur nos plages, en France et ailleurs, a des origines diverses. Saviez-vous qu'il y en a de moins en mois sur T ...","breadcrumb":{"@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#primaryimage","url":"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg","contentUrl":"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/06\/postQueueImg_1-62a376346bf88.jpg","width":1685,"height":1053,"caption":"D'o\u00f9 vient le sable des plages ?"},{"@type":"BreadcrumbList","@id":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/dou-vient-le-sable-des-plages#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.africa-press.net\/djibouti\/"},{"@type":"ListItem","position":2,"name":"D&#8217;o\u00f9 vient le sable des plages ?"}]},{"@type":"WebSite","@id":"https:\/\/www.africa-press.net\/djibouti\/#website","url":"https:\/\/www.africa-press.net\/djibouti\/","name":"Djibouti","description":"Just another Africa News Agency Sites site","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.africa-press.net\/djibouti\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1","name":"cfeditorfr"}]}},"_links":{"self":[{"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/posts\/4327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/users\/82"}],"replies":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/comments?post=4327"}],"version-history":[{"count":0,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/posts\/4327\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/media\/4326"}],"wp:attachment":[{"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/media?parent=4327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/categories?post=4327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.africa-press.net\/djibouti\/wp-json\/wp\/v2\/tags?post=4327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}