Category Archives: Physical geography

Lithosphere, LAB and Other Spheres of Earth

Posted on October 5, 2017 by

The lithosphere is the solid, outer part of the Earth. The lithosphere includes the brittle upper portion of the mantle and the crust, the outermost layers of Earth’s structure. below. The lithosphere is the most rigid of Earth’s layers. Although the rocks of the lithosphere are still considered elastic, they are not viscous. … Continue reading →

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Migmatite : A Mixed Rock

Posted on September 28, 2017 by

  Migmatite is a rock that is a mixture of metamorphic rock and igneous rock. It is created when a metamorphic rock such as gneiss partially melts, and then that melt recrystallizes into an igneous rock, creating a mixture of the unmelted metamorphic part with the recrystallized igneous … Continue reading →

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Parasitic Fold

Posted on September 13, 2017 by

Parasitic fold is a little fold sitting on a major fold. Image Link

Posted in Class Notes, earth, Physical geography, topography | 1 Comment

Asthenosphere

Posted on September 4, 2017 by

Asthenosphere is zone of Earth’s mantle (upper part of the mantle)lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere. The asthenosphere extends from about 100 km to about 700 km  below Earth’s surface. It was first named … Continue reading →

Posted in Class Notes, earth, Physical geography | 1 Comment