Plate boundaries and volcanoes relationship memes

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Volcano - Volcanoes related to plate boundaries: Topographic maps reveal the locations of large earthquakes and indicate the boundaries of the 12 major. Plate Tectonics World map of volcanoes, earthquakes, impact craters, and plate .. the relationship between earthquakes and volcanoes and the boundaries of Rules for Teachers Classroom Humor, Classroom Quotes, Teacher Quotes. In her words: "the relationship between the topography and the Bouguer / FA / isostatic to the top of the plate (e.g. a volcano) or within the plate (e.g. crustal thinning), Regarding to Plate tectonics theory why plate tectonics theory in the recent phases tectoniques compressives et des plis se forment en même temps.

The rigid lithospheric plates are driven by convection within the mobile asthenosphere. Hot mantle rises beneath mid-oceanic ridgesand cold, denser mantle descends at oceanic trenches. Lateral motion of the lithospheric plates above these circular convection cells is analogous to rigid blocks riding above a rotating conveyor belt.

Images modified from USGS. Volcanic eruptions above these lithospheric plates are driven by the ascent of magma molten rock from deep beneath the surface. The various magma types are described in Physicochemical Controls on Eruption Style.

The second law of thermodynamics as a unifying theme of geosciences

They vary from mafic, intermediate, to felsic as their silica SiO2 content increases. Mafic basaltic magmas are generated directly from the mantle, either within the asthenosphere or within the overlying mantle lithosphere.

Many mafic-to-intermediate basaltic-to-andesitic magmas appear to be derived from the melting of hydrated lithospheric mantle. More differentiated, intermediate-to-felsic magmas, on the other hand, are partly derived from the melting of continental crust by hot, mafic magmas that either pond at the crust-mantle boundary, or intrude into the overlying continents where they reside in magma chambers located at various crustal levels.

Volcanism is typically widespread along plate boundaries. Although volcanism in the interior of plates is less common, these intraplate regions can also generate voluminous eruptive products. The regional volcano-tectonic processes associated with plate-boundary environments and intraplate environments are described in more detail below. Adjacent plates are delineated by three types of boundaries defined by this relative motion: Underpinnings of this idea: Quite a few years ago, atmospheric scientist and educator par excellence Tony Del Genio told me in a casual hallway conversation that the purpose of mid-latitude storms was to transport thermal energy out of the tropics towards the poles so avoid an excess build-up of heat in the latitudes that receive the most insolation.

I was dumbstruck by this notion that storms, which I had considered to be an annoyance and an anomaly, could be viewed as having a "purpose" in the grand scheme of things.

The second law of thermodynamics as a unifying theme of geosciences

We were easily able to transfer the "structure" part of this idea to physical Earth Systems e. But we puzzled over what would be the Earth Science equivalent of the underlying functions. Tony's comment flashed into my mind, and I suggested that the "function" of a volcanic eruption could be to transport heat out of the earth's hot interior to be dissipated in the cooler atmosphere or ocean. Following this, other major Earth processes came to mind that could be viewed as serving the "function" of spreading energy out and away from regions of concentrated energy.

However, there was serious disagreement among our group about the legitimacy of thinking of energy dissipation as a "function" being served by the various Earth processes. The critique was that this view was too "teleological," which was bad bad bad in a scientific discussion.

I had to look up this word, and learned that a "teleological argument" is an "argument for the existence of God or a creator based on perceived evidence of order, purpose, design, or direction — or some combination of these — in nature.

Relation of Volcanism to Plate Tectonics ~ Learning Geology

For the Cutting Edge workshop on "Developing Student Understanding of Complex Systems in the Geosciences," Barb Dutrow submitted an essay entitled "Minerals as recorders of complex systems with coupled processes," in which she wrote: But my knowledge of metamorphic processes is too feeble to make this case. The second law of thermodynamics as a unifying theme of geosciences --Discussion Jun, Hi Kim, Once again you've written a very thought-provoking post.

I am in the process of re-designing my Environmental Geology and Natural Hazards class for the fall, and I might just take up this idea as some kind of unifying theme. Inspired by Tom Hickson's example of teaching a course with no lectures, I am aspiring to that goal. In the same way that natural hazards are processes stemming from the dispersion of energy, management of environmental hazards can be seen as attempts to concentrate or scatter various substances where they do the least harm I am trying to think of ways to communicate to my students that there is no such thing as "throwing something away.