Category Archives: earth

Magmatic processes and igneous intrusions

Posted on April 26, 2008 by Rashid Faridi

  Magma What is magma? Properties of magmas Chemical composition What is magma? Magma is hot molten mobile rock. Igneous rocks form when magma cools and solidifies. Magmas come out of active volcanoes as lavas. The most abundant magma is … Continue reading →

Posted in earth, Earth Magnetism, interior of the Earth, Landforms, Volcanoes | Leave a comment

Sedimentary Processes and Rocks

Posted on April 25, 2008 by Rashid Faridi

Sedimentary rocks form by the breakdown (both physical and chemical) of pre-existing rocks (these may be of igneous, metamorphic or sedimentary origin). The main factors that control this breakdown are: climate topography vegetation properties (physical and chemical) of the rock. … Continue reading →

Posted in earth, interior of the Earth, rocks | 5 Comments

Why Does Earth’s Magnetic Field Flip?

Posted on February 26, 2008 by Rashid Faridi

Earth’s magnetic field has flipped many times over the last billion years, according to the geologic record. But only in the past decade have scientists developed and evolved a computer model to demonstrate how these reversals occur. “We can see … Continue reading →

Posted in earth, Earth Magnetism, Uncategorized | 3 Comments