Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Site Tools

  • AAAS
  • Subscribe
  • Feedback

Site Search

Search Advanced

Science 2 November 2007:
Vol. 318. no. 5851, p. 746
DOI: 10.1126/science.1144931
Prev | Table of Contents | Next

Technical Comments

Comment on "A Vestige of Earth's Oldest Ophiolite"

Warren B. Hamilton

The claim by Furnes et al. (Reports, 23 March 2007, p. 1704) that Greenland metavolcanic rocks require Paleoarchean sea-floor spreading is incompatible with their own data. The purported sheeted dikes have the composition of pyroxenitic komatiite and could not have fed the adjacent ferroandesitic pillow lavas. Neither type has ophiolitic analogs, and both are likely ensialic.

Department of Geophysics, Colorado School of Mines, Golden, CO 80401, USA. E-mail: whamilto{at}mines.edu

Read the Full Text

ADVERTISEMENT
Click Me!

ADVERTISEMENT

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)