This Question has already been solved. Stay tuned for more questions and win a Garmin GPS unit.

This puzzle has been successfully completed by member bigrex!

The firstirst person to report the answer (quartz-dolomite sulfide vein) as well as this url (example: http://www.goldplacer.com/1564865.htm ) on the contest thread wins one point towards the Garmin GPS and research package.

Good Luck!