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Sample 92A

NavDat sample number 3526 · GABBRO

Sample

Sample ID92A
Rock nameGABBRO
Rock typePLUTONIC
CompositionMAFIC
MaterialIGNEOUS
Commentdike intrusion of alk-gabbro

Location

Latitude47.2258
Longitude-111.772
Locationroadcut on I-15, western edge of section
State / provinceMontana
Volcanic fieldAdel Mountain Volcanics

Age

Age (Ma)ErrorMinMaxGeologic ageDated by
74 73 76

Analyses

Whole rock

ItemValueStd. dev.UnitMethod
SIO251.3WT%SPEC
TIO20.6WT%SPEC
AL2O316WT%SPEC
FE2O3T10.3WT%SPEC
MGO4.3WT%SPEC
CAO7.7WT%SPEC
NA2O3.4WT%SPEC
K2O5.6WT%SPEC
TOTAL99.2WT%SPEC

References