Sample 291

NavDat sample number 88040 · RHYODACITE

Sample

Sample ID	291
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Hildreth and others
Comment	Largest intracaldera dome, multilobate

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.013		1.005	1.021

Item	Value	Unit	Method
SIO2	71.2	WT%	XRF
TIO2	0.4	WT%	XRF
AL2O3	15.22	WT%	XRF
FEOT	2.23	WT%	XRF
MNO	0.04	WT%	XRF
MGO	0.52	WT%	XRF
CAO	1.78	WT%	XRF
NA2O	4.92	WT%	XRF
K2O	3.1	WT%	XRF
P2O5	0.15	WT%	XRF
LOI	1.04	WT%	XRF
TOTAL	98.14	WT%	XRF
RB	67	PPM	XRF
SR	236	PPM	XRF
Y	16	PPM	XRF
ZR	227	PPM	XRF
BA	1030	PPM	XRF
CE	49	PPM	XRF
V	27	PPM	XRF
ZN	50	PPM	XRF