{"version":"1.0","provider_name":"VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue","provider_url":"https:\/\/blogs.futura-sciences.com\/bardintzeff","author_name":"jmbardintzeff","author_url":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/author\/jmbardintzeff\/","title":"Marmites de g\u00e9ants en Afrique du Sud, par Jacques-Marie Bardintzeff","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"9L8X7Uyv6G\"><a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2025\/11\/14\/marmites-de-geants-en-afrique-du-sud\/\">Marmites de g\u00e9ants en Afrique du Sud<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2025\/11\/14\/marmites-de-geants-en-afrique-du-sud\/embed\/#?secret=9L8X7Uyv6G\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Marmites de g\u00e9ants en Afrique du Sud\u00a0\u00bb &#8212; VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue\" data-secret=\"9L8X7Uyv6G\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","description":"En Afrique du Sud, la rivi\u00e8re Blyde River a creus\u00e9 une gorge \u00ab\u00a0Blyde River Canyon\u00a0\u00bb (on parle d\u2019\u00e9rosion). Localement, par ses tourbillons entra\u00eenant sables et graviers, elle a form\u00e9 des cavit\u00e9s cylindriques d\u2019environ 1 m\u00e8tre de diam\u00e8tre, appel\u00e9es \u00ab\u00a0marmites de g\u00e9ants\u00a0\u00bb. Marmites de g\u00e9ants dans Blyde River Canyon en Afrique du Sud, le 25\/11\/2024 (\u00a9 &hellip; Continuer la lecture de  &rarr;","thumbnail_url":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2025\/11\/Bardintzeff.20241125_105347.Blyde_River_Canyon.marmite_geantlow.s.jpg","thumbnail_width":1134,"thumbnail_height":850}