Sample R-30

NavDat sample number 19279

Sample

Sample ID	R-30
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	38.7775
Longitude	-105.509
Location	Guffey Volcanic Center
State / province	Colorado
Volcanic field	39-Mile Volcanic Field

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
35		33.9	36.1

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	57.88		WT%	XRF
TIO2	0.46		WT%	XRF
AL2O3	18.61		WT%	XRF
FE2O3	4.32		WT%	XRF
FEO	0.3		WT%	XRF
MNO	0.12		WT%	XRF
MGO	1.51		WT%	XRF
CAO	3.96		WT%	XRF
NA2O	3.88		WT%	XRF
K2O	3.72		WT%	XRF
P2O5	0.25		WT%	XRF
LOI	5.04		WT%	XRF
RB	43		PPM	XRF
SR	1176		PPM	XRF
BA	2249		PPM	XRF
Y	15		PPM	XRF
ZR	278		PPM	XRF
V	42		PPM	XRF
NI	5		PPM	XRF
CR	5		PPM	XRF

References

Wobus, Reinhard A; Mochel, David W; Mertzman, Stanley A; Eide, Elizabeth A; Rothwarf, Miriam T; Loeffler, Bruce M; Johnson, David A; Keating, Gordon N; Sultze, Kimberly; Benjamin, Anne E; Venzke, Edward A; Filson, Tammy (1990) Geochemistry of high-potassium rocks from the mid-Tertiary Guffey volcanic center, Thirtynine Mile volcanic field, central Colorado; with Suppl. Data 90-15. Geology Boulder. 18; 7, Pages 642-645. 1990. .