Sample 93L-11B

NavDat sample number 36762 · RHYOLITE

Sample

Sample ID	93L-11B
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	37.613
Longitude	-106.679
Location	Beaver Cr Youth Camp
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	61.4		WT%	XRF
TIO2	0.56		WT%	XRF
AL2O3	15.9		WT%	XRF
FE2O3	4.15		WT%	XRF
MGO	1.32		WT%	XRF
CAO	3.87		WT%	XRF
NA2O	3.52		WT%	XRF
K2O	4.32		WT%	XRF
P2O5	0.25		WT%	XRF
MNO	0.11		WT%	XRF
LOI	3.43		WT%	XRF
TOTAL	95.4		WT%	XRF
RB	93		PPM	XRF
SR	570		PPM	XRF
Y	24		PPM	XRF
ZR	215		PPM	XRF
NB	12		PPM	XRF
BA	1000		PPM	XRF
LA	42		PPM	XRF
CE	65		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. .