TWIN SISTERS MOUNTAIN
Whatcom County, Washington, USA
LOCALITY IMAGES


GEOLOGY
(Under Construction)

MINERALS
CHROMIO-PARGASITE (confirmed by SEM/EDS analysis)-
{Na}{Ca2}{Mg4Cr3+}(Al2Si6O22)(OH)2 - Occurs as flat prismatic green crystals to about 3 cm, asssoicated with dunite.
CHROMITE-
FeCr2O4 - Occurs as black cumulate grains, often forming bands, within dunite.
CLINOCHLORE (Var: Chromian Clinochlore)-
Mg5(Al,Cr)2Si3O10(OH)8 - Occurs as lilac-colored micaceous and schistose grains, often associated with chromite and uvarovite.
UVAROVITE-
Ca3Cr2(SiO4)3 - Occurs as vibrant emerald-green mm-scale crystals, often associated with chromite and clionochlore.
 
CHROMITE in dunite

 
CLINOCHLORE
(Var: Chromian Clinochlore)
with UVAROVITE and CHROMITE,
 
CHROMIO-PARGASITE in dunite

 
CLINOCHLORE
(Var: Chromian Clinochlore)
with UVAROVITE and CHROMITE,

 
CLINOCHLORE
(Var: Chromian Clinochlore)
John Lindell Collection


REFERENCES
(Under Construction)