This resource is no longer officially part of our collection This resource has been removed from our collection, likely because the original resource is no longer available.
If you have further information about the link (e.g. a new location where the information can be found) please let us know.
You may be able to find previous versions at the Internet Archive.
This image shows how circulation in the asthenosphere produces upwellings of magma at spreading centers which become oceanic lithosphere. At plate margins, the oceanic lithosphere is subducted beneath continental lithosphere until it reaches sufficient depth for melting to occur. Rising magma from the melting asthenosphere produces volcanism and igneous rocks in the continental lithosphere adjacent to the plate margin. Stresses and heating produced by subduction at the plate margin cause metamorphism of existing rocks in that region. At or near the surface, weathering, transport, and deposition produce sedimentary rocks which blanket the lithosphere.
This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you
have information we can use to flesh out or correct this record let us know.
