Mr.Hong
How rocks are formed.pptx
How
rocks are formed.pptx
November 22, 2011
google docs
author unknown
igneous rock
igneous rock
November 22, 2011
http://www.ethosmarblecare.co.uk/images/petrology/igneous.jpg
author unknown
intrusive rock
intrusive rock
November 22, 2011
http://www.windows2universe.org/earth/geology/images/batholith_sm.gif
author unknown
extrusive rock
extrusive rock
November 22, 2011
http://geology.com/rocks/pictures/basalt.jpg