Research NewsPlanetary Science

Possible Glimpse of Earth-like Geology In Mars Rock

See allHide authors and affiliations

Science  01 Aug 1997:
Vol. 277, Issue 5326, pp. 638-639
DOI: 10.1126/science.277.5326.638a

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


One small rock on the vast, rusty desert of Mars has riveted the attention of geologists on Earth. Mars Pathfinder's rover, Sojourner, has found that the rock, dubbed Barnacle Bill, contains far more of the ubiquitous substance silica than any known rock in the solar system outside Earth. That's intriguing because high-silica rocks on Earth generally come from volcanic eruptions fueled by the sinking of plates of surface rock into the planet's interior, a process thought to be uniquely terrestrial.