hard-rock geology links

Below are links to some of the better sites lurking on the World Wide Web that have hard-rock geology content. If you wish to submit your own useful links please use the contact form here.
Website Name
URL
Hard Rock Zone Facebook Page
British Geological Survey
Volcanic and Magmatic Studies Group (VMSG)
VMSG Facebook Group
The Mineralogical Society
The Geological Society
British Antarctic Survey
MantlePlumes.org
Geokem
Georoc
The Volcanism Blog
US Geological Survey
Global Volcanism Project
DougalEARTH
Metamorphic Studies Group
Tools for Petrologists
VOLCANOFILES
Volcano World