23 August 1974
Vol 185, Issue 4152

About The Cover

Panicoid phytoliths (about 20 microns long) in deep sea sediments of the eastern Atlantic Ocean, transported by the trade winds from equatorial Africa during a cool, arid period about 140,000 years ago. See page 695. [V. Peters, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, and J. Comeau, U.S. Geological Survey, Woods Hole]