Sample 93L-10B

NavDat sample number 36760 · RHYOLITE

Sample

Sample ID	93L-10B
Rock name	RHYOLITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	37.457
Longitude	-106.797
Location	Wolf Cr Ski Area, ridgecrest
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	61.7		WT%	XRF
TIO2	0.61		WT%	XRF
AL2O3	16.8		WT%	XRF
FE2O3	4.47		WT%	XRF
MGO	1.24		WT%	XRF
CAO	3.64		WT%	XRF
NA2O	4.04		WT%	XRF
K2O	3.91		WT%	XRF
P2O5	0.26		WT%	XRF
MNO	0.1		WT%	XRF
LOI	2.16		WT%	XRF
TOTAL	96.77		WT%	XRF
RB	87		PPM	XRF
SR	650		PPM	XRF
Y	27		PPM	XRF
ZR	215		PPM	XRF
NB	11		PPM	XRF
BA	1250		PPM	XRF
LA	42		PPM	XRF
CE	75		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. .