http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (streaming video file) (35 minutes): digital, .flv file, sound
Descend into the Grand Canyon, recording the full sequence of strata from top to bottom—a story that takes you from 270-million-year-old limestone formed in a shallow sea to basement rocks that record a mountain-building saga from 1.7 billion years ago..
Originally produced by The Great Courses in 2015.