United States Plymouth Rock is a
glacial erratic boulder of granodiorite. The
Sierra Nevada mountains contain large sections of granodiorite.
Egypt Granodiorite was quarried at
Mons Claudianus in the
Red Sea Governorate in eastern
Egypt from the 1st century AD to the mid-3rd century AD. Much of the quarried stone was transported to
Rome for use in major projects such as
the Pantheon and
Hadrian's Villa. Additionally, granodiorite was used for the
Rosetta Stone. The extent of Egyptian granodiorite masonry is unclear. Egypt's 6000-year history makes determining the period of usage difficult as well. Perhaps like
porphyry, it was ignored by the successive dynasties of Egypt and only heavily mined during Ptolemaic or Roman times. This is evidenced by the fact that most examples of granodiorite sculpture seem to have come from later dates. However, its presence in the Rosetta Stone implies that they had considerable experience with it and the fact that only newer artifacts are found may simply be because earlier pieces were lost.
Ireland Granodiorite is quarried in the
Newry area of
County Armagh with the common name of 'Newry granite'. ==Uses==