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magma
(Encyclopedia) magmamagmamăgˈmə [key]: see lava.Kikai Caldera
(Encyclopedia) Kikai Caldera, massive caldera, c.12 mi (19 km) in diameter, Ryukyu Islands, Kagoshima Prefecture, Japan. Located c.30 mi (48 km) from the southern tip of the densely populated major…lava
(Encyclopedia) lavalavaläˈvə [key], molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure. It solidifies into igneous rock that is also…subduction zone
(Encyclopedia) subduction zone, large-scaled narrow region in the earth's crust where, according to plate tectonics, masses of the spreading oceanic lithosphere bend downward into the earth along the…The Nature of Volcanoes
Volcanoes are built by the accumulation of their own eruptive products—lava, bombs (crusted over ash flows), and tephra (airborne ash and dust). A volcano is most commonly a conical hill or mountain…granite
(Encyclopedia) granite, coarse-grained igneous rock of even texture and light color, composed chiefly of quartz and feldspars. It usually contains small quantities of mica or hornblende, and minor…petrology
(Encyclopedia) petrology, branch of geology specifically concerned with the origin, composition, structure, and properties of rocks, primarily igneous and metamorphic, and secondarily sedimentary. It…seafloor spreading
(Encyclopedia) CE5 Schematic model of the oceanic crust, showing seafloor spreading seafloor spreading, theory of lithospheric evolution that holds that the ocean floors are spreading outward…Composite Volcanoes
Composite volcanoes, sometimes called stratovolcanoes, are typically deep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks…Anatomy and
Physiology: The Circulatory System
The Circulatory SystemAnatomy and
PhysiologyThe Circulatory SystemCells, Bells!Blood Types and GeneticsNow I Know My WBCs
You might remember that blood is a form of connective tissue (widely…Trending
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