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Sample T152

NavDat sample number 6900 · LATITE

Sample

Sample IDT152
Rock nameLATITE
Rock typeVOLCANIC
CompositionINTERMEDIATE
MaterialIGNEOUS
Commentaphanitic holocrystalline groundmass with phenocrysts of plagioclase, hornblende, biotite, and rare aegirine-augite; groundmass composed of lath-shaped orthoclase arranged in trachytic texture, interstitial quartz; glomerophyric

Location

Latitude44.3897
Longitude-104.039
LocationBlack Hills
State / provinceSouth Dakota
Volcanic fieldTinton District

Age

Age (Ma)ErrorMinMaxGeologic ageDated by
48 38 59

Analyses

Whole rock

ItemValueStd. dev.UnitMethod
SIO263.24WT%EPMA
AL2O318.88WT%EPMA
FE2O32.2WT%EPMA
FEO1.81WT%EPMA
MGO1.13WT%EPMA
CAO2.19WT%EPMA
NA2O5.85WT%EPMA
K2O3.63WT%EPMA
TIO20.69WT%EPMA
P2O50.18WT%EPMA
MNO0.2WT%EPMA
SO30WT%EPMA

References