IGNEOUS PETROLOGY: HOTSPOTS A QUICK INSIGHT! Hotspots are regions of unusually high heat flow in the mantle that generate magma and form volcanoes away from plate boundaries. Unlike mid-ocean ridges or subduction zones, they occur within plates and remain relatively stationary while plates move over them. They are thought to originate from mantle plumes-columns of hot rock rising from deep within the Earth. As the lithosphere moves, a chain of volcanoes or islands forms, recording plate motion o
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IGNEOUS PETROLOGY: HOTSPOTS A QUICK INSIGHT! Hotspots are r…
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Rocks and Minerals - Geology (U.S. National Park Service)
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Rocks and Minerals - Geology (U.S. National Park Service)
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Ramya_geologist on Instagram: "Namaste everyone 😊🙏 Sonorous rocks are rocks that produce a clear, ringing, metallic sound when struck. This acoustic property usually comes from their high density, tight mineral packing, and strong internal bonding, allowing vibrations to travel efficiently through the rock. Igneous rocks like basalt and certain well-indurated quartzites often show this effect, especially when fresh and unweathered. In the field, the “ringing test’’ helps geologists identify ro
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Ramya_geologist on Instagram: "Namaste everyone 😊🙏 Sonorous roc…
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Instagramaspire_geologist
GEOLOGY HUB on Instagram: "A sill is a concordant igneous intrusion, meaning it forms a sheet that intrudes parallel to the existing layers (bedding planes) of the host rock, rather than cutting across them like a discordant dyke. Magma squeezes between rock layers, creating a tabular body that follows the rock's structure. #geology #igneous #petrology #geologyfield #geologytrip"
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GEOLOGY HUB on Instagram: "A sill is a concordant igneous intrus…
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These crystals may look similar to aqua or topaz but are actually a feldspar. Meet the crystal clear blue sanidine crystals from the Itrongay area in Madagascar. These are a form of potassium feldspars that crystallize in quartz and feldspar rich igneous rocks at extremely high temperatures. They get their name from the Greek
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These crystals may look similar to aqua or topaz but are actually a fel…
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TikTokvirgogemco
During equilibrium crystallization, as the magma cools, the crystals are a solid solution, meaning that the ions can move around. This makes for crystals that are homogenous in their chemistry. Mineralogists and geologists look at the chemistry of minerals so understand the conditions under which magma cooled to create the rocks/minerals they study. - #geology #geologymajor #petrology #igneous #magma #crystallize
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During equilibrium crystallization, as the magma cools, the crystals …
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