Alden, Andrew. if(ignore != '' && all_links.href.search(ignore) != -1) { The lower mantle extends from 660 kilometers down to about 2,700 kilometers. The upper mantle is attached to the layer above it called the crust. In the mantle, heat and pressure generally increase with depth. The upper mantle is a small portion of the Earth's mantle: While the upper mantle ranges from about 200 to 250 miles thick, the entire mantle is about 1802 miles thick and makes up about 84 . The Mesosphere's atmosphere has low density and made up of carbon dioxide, oxygen, and nitrogen. It is a rocky shell similar to Mercury, Venus and Mars. This is marked by S-waves coming to an abrupt stop, presumably because the outer core is liquid, and a sudden large reduction in the speed of P-waves . The mesosphere is located as the third layer of the five layers in which the atmosphere is composed of. Contents. This layer is hard to study. Earth has the same recipe of elements as the Sun and the other planets (ignoring hydrogen and helium, which have escaped Earth's gravity). Text on this page is printable and can be used according to our Terms of Service. Due to high atmospheric drag in the mesosphere it is not possible for research equipment such as satellites to stay in orbit. Or they may not. Ezgo Rxv Motor Replacement, Share us! (a.addEventListener("DOMContentLoaded",n,!1),e.addEventListener("load",n,!1)):(e.attachEvent("onload",n),a.attachEvent("onreadystatechange",function(){"complete"===a.readyState&&t.readyCallback()})),(n=t.source||{}).concatemoji?c(n.concatemoji):n.wpemoji&&n.twemoji&&(c(n.twemoji),c(n.wpemoji)))}(window,document,window._wpemojiSettings); // alert('Changed '+all_links.href); } The Earths mantle lies between the crust and the outer core of our planet. Any interactives on this page can only be played while you are visiting our website. Lithospheric crust is characterized by gneiss (continental crust) and gabbro (oceanic crust). for (var t=0; t