Sample 93L-9A

NavDat sample number 36764 · RHYOLITE

Sample

Sample ID	93L-9A
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	37.626
Longitude	-106.682
Location	US Hwy 160, Hway Springs CG
State / province	COLORADO

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28.41		28.31	28.51

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	63.3		WT%	XRF
TIO2	0.57		WT%	XRF
AL2O3	16.3		WT%	XRF
FE2O3	4.06		WT%	XRF
MGO	1.32		WT%	XRF
CAO	3.22		WT%	XRF
NA2O	3.83		WT%	XRF
K2O	4.23		WT%	XRF
P2O5	0.26		WT%	XRF
MNO	0.07		WT%	XRF
LOI	1.88		WT%	XRF
TOTAL	97.16		WT%	XRF
RB	85		PPM	XRF
SR	660		PPM	XRF
Y	21		PPM	XRF
ZR	210		PPM	XRF
NB	10		PPM	XRF
BA	1050		PPM	XRF
LA	40		PPM	XRF
CE	70		PPM	XRF

References

Lipman, Peter W; Dungan, Michael A; Brown, Laurie L; Deino, Alan L (1996) Recurrent eruption and subsidence at the Platoro Caldera complex, southeastern San Juan volcanic field, Colorado; new tales from old tuffs. Geological Society of America Bulletin. 108; 8, Pages 1039-1055. 1996. .