Mid-ocean ridge basalts (MORBs), located far from subduction zones, are typically thought to be unaffected by subduction processes. However, some MORBs display arc-like geochemical ...

Mid-ocean ridges mark the sites of divergent plate boundaries where upwelling mantle undergoes decompression melting to form new oceanic crust. Variations in spreading rate—from fast to ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Ken Sims, a professor in UW’s Department of Geology and Geophysics, recently received a $325,841 National Science Foundation grant to look at understanding the processes and timescales of basalt ...

The human-occupied vehicle Alvin, during a dive on the East Pacific Rise, collected samples and recovered instruments placed at the vents during previous expeditions. Woods Hole, Mass (October 13, ...

A new analysis of rocks thought to be at least 2.5 billion years old by researchers at the Smithsonian's National Museum of Natural History helps clarify the chemical history of Earth's mantle—the ...

I just returned from Iceland, a bucket list trip for me and a Mecca for geologists. Iceland, in the northern Atlantic Ocean between Greenland and Norway just south of the Arctic Circle, is unusual in ...