The magma then degasses like a can of shaken beer when the pull tab is removed. When degassing magma adds to the explosive force, the eruption is known as "phreatomagmatic." Not all phreatic and phreatomagmatic eruptions occur from the interaction of hot magma with groundwater. Other water...
Distinguish between discordant and concordant igneous rock bodies. What two factors determine the viscosity of magma and lava? Describe how flood basalts have changed the landscape of many continents. How do fossils aid in oil exploration?
They also do not exhibit the property of cleavage because they lack internal planes of weakness.ADVERTISEMENT Obsidian is a mineraloid. It is a volcanic glass that cools so rapidly that atoms do not have time to arrange themselves into a crystalline solid. Instead, they form an amorphous, ...
Answer to: What accounts for the fact that some minerals such as plagioclase feldspars have a range of compositions rather than one specific...
the Bushveld Complex represents the largest igneous intrusion on the planet. An intrusion is a body of igneous rock that has layers like those seen insedimentary rock formation, the result of magma cooling as it surges to the surface. Intrusions are known for harboring rich mineral deposits, and...
How do you know what grade your ore is? The average grade of each hole is the sum of the productsof each sample length by its assay value divided by the sum of the lengths. This grade, multiplied by the volume of the prism and divided by the volume-per-ton factor, gives the tons-...
One question immediately arises: How do extremophiles actually manage to subsist in these extreme conditions or even combinations of extreme conditions? Clearly, the answer to this question is highly complex and specific to each class of extremophiles. For thermophiles for instance, both RNA and DNA...
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How Do Cinder Cones Form? Cinder cones form when molten rock known as "magma" approaches Earth's surface. The magma that forms cinder cones contains a tremendous amount of dissolved gas - and that gas is what powers a cinder cone eruption. Some gas-charged magmas contain several percent volc...
What's the difference between mafic and felsic magma? How is a mineral hardness defined and compared? The iron ore magnetite consists of What type of chemical compounds make up the rock materials on the ocean flats? What is zinc's hardness (high, medium or low)? Describe a method to ...