Editing Granite (section)

===Physical properties===
The average [[density]] of granite is between {{convert|2.65|and|2.75|g/cm3|lb/ft3|abbr=on}},<ref>{{cite web |url=http://www.edumine.com/xtoolkit/tables/sgtables.htm |title=Rock Types and Specific Gravities |website=EduMine |access-date=2017-08-27 |archive-url=https://web.archive.org/web/20170831000357/http://www.edumine.com/xtoolkit/tables/sgtables.htm |archive-date=2017-08-31 |url-status=dead }}</ref> its [[compressive strength]] usually lies above 200 MPa (29,000 psi), and its [[viscosity]] near [[Standard temperature and pressure|STP]] is 3–6·10<sup>20</sup> Pa·s.<ref>{{cite journal
  | last = Kumagai
  | first = Naoichi
  | author2 = Sadao Sasajima
  | author3 = Hidebumi Ito
  | title = Long-term Creep of Rocks: Results with Large Specimens Obtained in about 20 Years and Those with Small Specimens in about 3 Years
  | journal = Journal of the Society of Materials Science (Japan)
  | volume = 27
  | issue = 293
  | pages = 157–161
  |doi=10.2472/jsms.27.155
  | date = 1978| doi-access = free
  }}</ref>

The melting temperature of dry granite at ambient pressure is {{convert|1215–1260|°C|comma=off}};<ref>{{cite journal |url=http://www.minsocam.org/msa/collectors_corner/arc/tempmagmas.htm |journal=American Mineralogist |volume=14 |pages=81–94 |year=1929 |title=The temperatures of magmas |author=Larsen, Esper S.}}</ref> it is strongly reduced in the presence of water, down to 650&nbsp;°C at a few hundred megapascals of pressure.<ref>{{cite journal |author=Holland, Tim |author2=Powell, Roger |title=Calculation of phase relations involving haplogranitic melts using an internally consistent thermodynamic dataset |journal= Journal of Petrology |volume=42 |issue=4 |pages=673–683 |year=2001 |doi=10.1093/petrology/42.4.673 |bibcode=2001JPet...42..673H|doi-access=free }}</ref>

Granite has poor primary [[permeability (earth sciences)|permeability]] overall, but strong secondary permeability through cracks and fractures if they are present.