USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Earth material > Volcanic rock > Felsic volcanic rock
Help
Dacite
A volcanic rock defined in the QAPF diagram as having Q/(Q+A+P) between 20 and 60% and P/(P+A) > 65%...
Subtopics:
(none)

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/catalog/term-simple.php?thcode=4&term=3.4.4
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 18:36 on 25-Apr-2013