This was cool becuase we looked at how upper crust interaction ie mountain building events are affected by the underlaying interaction of the crust and upper mantle - he actually mentioned the word asthenosphere which I haven't heard since like A'level geology I swear!.    From Wordnik.com.  [Snell-Pym » East Asian Monsoon] Reference

Near the top of the mantle is a region of partially melted rock called the asthenosphere.    From Wordnik.com.  [AP Environmental Science Chapter 3- The Solid Earth] Reference

Convection currents within the mantle cause these plates to move slowly across the asthenosphere.    From Wordnik.com.  [Structure of the Earth] Reference

The top layer of the upper mantle, 100 to 200 kilometers below surface, is called the asthenosphere.    From Wordnik.com.  [Structure of the Earth] Reference

These plates have the ability to move horizontally by gliding over the plastic asthenosphere (see Figure 8).    From Wordnik.com.  [Plate tectonics] Reference

The lithosphere is a layer that includes the crust and the upper most portion of the asthenosphere (Figure 2).    From Wordnik.com.  [Structure of the Earth] Reference

The layer of the mantle above the asthenosphere plus the entire crust make up a region called the lithosphere.    From Wordnik.com.  [AP Environmental Science Chapter 3- The Solid Earth] Reference

It is believed that hot spots are caused by plumes of rising magma that have their origin within the asthenosphere.    From Wordnik.com.  [Volcano] Reference

In geology, just underneath the lithosphere, there is another layer -- a more fluid, plastic-like surface, called the asthenosphere.    From Wordnik.com.  [David McWilliams: Market Pressure] Reference

They travel at a speed of about 5 to 7 kilometers per second through the lithosphere and about 8 kilometers per second in the asthenosphere.    From Wordnik.com.  [Earthquake] Reference

Plumes of magma from the Earth's asthenosphere are generated from the friction produced at the contact zone where oceanic crust slides past continental crust.    From Wordnik.com.  [Formation of the Earth's crust] Reference

Subsequent research discovered that the Earth's surface was composed of a number of oceanic and continental plates that float on top of the asthenosphere (see Figure 3).    From Wordnik.com.  [Plate tectonics] Reference

The lithosphere, and therefore, the earth's crust, is not a continuous shell, but is broken into a series of plates that independently "float" upon the asthenosphere, much like a raft on the ocean.    From Wordnik.com.  [AP Environmental Science Chapter 3- The Solid Earth] Reference

In this convergence, the ocean plate area between the arc and the continent is subducted into the asthenosphere and the volcanic rocks and sediments associated with the island arc become accreted to the margin of the continent over time.    From Wordnik.com.  [Mountain] Reference

Below the rigid lithosphere is the softer asthenosphere, on which the continental and oceanic plates ride.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

In classifying Earth's lithosphere, asthenosphere, crust, mantle and core, which one of the 5 is based solely?.    From Wordnik.com.  [Yahoo! Answers: Latest Questions] Reference

End of Time 7 slippage in this case refers to the movement of tectonic plates that lie in the Earth's asthenosphere.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

These puzzle pieces move a little bit each year as they slide on top of a somewhat fluid part of the mantle called the asthenosphere.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Surprisingly, they found a sharp boundary 150 kilometers below the surface, far too shallow to be the lithosphere-asthenosphere boundary.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

The volcanoes that do not occur along plate boundaries are the result of localized asthenosphere hot spots that melt through the Earth's crust.    From Wordnik.com.  [Featured Articles - Encyclopedia of Earth] Reference

"As the lithosphere moves over the asthenosphere, the material gets stretched and acquires texture, which indicates the direction in which the plates are moving," she said.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Romanowicz and UC Berkeley postdoctoral fellow Huaiyu Yuan are testing a new technique, seismic azimuthal anisotropy, to look for the boundary between the lithosphere and asthenosphere.    From Wordnik.com.  [EurekAlert! - Breaking News] Reference

Cosmogeological PLATE TECTONICS supports rapid CATASTROPHIC PLATE TECTONICS after asteroid impacts and rapid EB geo-transfers (rapid movement of outer nucleus masses into asthenosphere).    From Wordnik.com.  [California Literary Review] Reference

2005, Models of lithosphere and asthenosphere anisotropic structure of the Yellowstone hot spot from shear wave splitting: Journal of Geophysical Research, v. 110, B11304, doi: 10.1029/2004JB003501.    From Wordnik.com.  [Scientific Articles on Yellowstone] Reference

A. hydrosphere, atmosphere, lithosphere and asthenosphere B. troposphere, biosphere, magnetosphere and exosphere C. tonosphere, mesosphere, atmosphere and hydrosphere D. atmosphere, biosphere, hydrosphere and geosphere Correct Answer: D DOK: 2 2. 4c Why has the government restricted the use of aerosol sprays and foam packaging that contain chlorofluorocarbons (CFC's)?.    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

Topics in Sedimentary Geology That I Write About Theoretical Stratigraphy #2: Barrell and the Rhythms of Geologic Time Degassing conditions for permeable silicic magmas: Implications from decompression experiments with constant rates Well-wetted olivine grain boundaries in partially molten peridotite in the asthenosphere Correction to "Frictional and transport properties of the Chelungpu fault from shallow borehole data and their correlation with seismic behavior during the 1999 Chi‐Chi earthquake".    From Wordnik.com.  [Clastic Detritus] Reference

Posted Jul 16, 2006 at 4:46 PM | Permalink | Reply re 184: Bruce, then your proposition is that an alternative theory to plate tectonics can explain why the continents are seen to wander over the planets surface (continental drift), with major tectonic activity at the boundaries (mid ocean ridges, subduction zones, transform faults), why magnetic stripes occur on the ocean floor and symmetric with mid ocean ridges, why lithospheric thickness varyies depending on whether you are in oceanic or continental crust, a seismic low velocity zone (asthenosphere) beneath the lithosphere, geological evidence of crustal structure in uplifted oceanic crust as on Cyprus (Troodos Massif) and much more!.    From Wordnik.com.  [WSJ: House Energy report on the "mutual admiration society" « Climate Audit] Reference

The lithosphere—that’s the outer layer above the earth’s asthenosphere—is a patchwork of slow, constantly moving plates that push and rub against each other.    From Wordnik.com.  [Black Magic] Reference

Beneath the lithosphere is the asthenosphere.    From Wordnik.com.  [Structure of the Earth] Reference

The top layer, the ancient craton, is chemically distinct from younger lithosphere below (the thermal root), which is separated from the asthenosphere by a boundary layer (LAB). (.    From Wordnik.com.  [PhysOrg.com - latest science and technology news stories] Reference