UK Grid Reference: SH609723
Latitude: 53°13'45"N
Longitude: 4°5'2"W
Brinrobertsite was found in a metabentonite of the Ordovician Nant Ffrancon formation outcropping on the coast at Aber-Ogwen near Bangor.
Ref: Brinrobertsite: a new R1 interstratified pyrophyllite/smectite-like clay mineral: characterization and geological origin. Mineralogical Magazine: 1 August 2002, vol. 66, no. 4, pp. 605-617(13). Dong H.; Peacor D.R.; Merriman R.J.; Kemp S.J.
The Nant Ffrancon formation occurs widely across parts of Gwynedd and elsewhere hosts a number of small and largely unsuccessful iron mines that exploited sedimentary deposits precipitated within the mudstone.
Mineral List
3 entries listed. 2 valid minerals. 1 type locality (valid mineral).
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please
register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
Mineral and Locality Search
