Sample CRS-272-a

NavDat sample number 7371 · DACITE

Sample

Sample ID	CRS-272-a
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	47.1
Longitude	-121.82
State / province	Washington

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		23	27

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.17		WT%	XRF
TIO2	0.77		WT%	XRF
AL2O3	15.99		WT%	XRF
FEOT	5.89		WT%	XRF
MNO	0.09		WT%	XRF
MGO	2.53		WT%	XRF
CAO	5.02		WT%	XRF
NA2O	3.38		WT%	XRF
K2O	2.01		WT%	XRF
P2O5	0.13		WT%	XRF
TOTAL	101.06		WT%	XRF
LOI	3.2		WT%	XRF

References

Fischer, Joseph Fred (1970) The geology of the White River-Carbon Ridge area, Cedar Lake Quadrangle, Cascade Mountains, Washington.