The Upper Penninic Antrona and Zermatt–Saas zones are composed of Piemont oceanic crust of Middle to Late Jurass Helvetic, Penninic, Austro的多数单位高山和SouthAlpine领域由二叠纪,中生和新生代的沉积躺在上面由多不的Caledonian和Variscan地下室的组成岩土体。 上部Penninic Antrona和Zermatt-Saas区域由...
You're getting a chain of volcanic islands where the hot plume melts through the crust under the Pacific Ocean at one point after another with active volcanoes on the younger islands that are now just above the plume, and the other islands, well, the farther away from the plume they are ...
not at the edges, but in the middle of a continental or oceanic plate. The Hawaiian Islands for example, are thousands of kilometers away from any plate boundary. And yet, you have vast amounts of magma—molten rock or lava—flowing up through the Earth's crust … which means, of ...
crust under the Pacific Ocean at one point after another—with active volcanoes on the younger islands that're now just above the plume, and the other islands …well, the farther away from the plume they are now, the older they are and the longer ago their volcanoes went dormant or ...
not at the edges, but in the middle of a continental or oceanic plate. The Hawaiian Islands for example, are thousands of kilometers away from any plate boundary. And yet, you have vast amounts of magma—molten rock or lava—flowing up through the Earth's crust… which means, of ...