Sample 109

NavDat sample number 17601 · RHYODACITE

Sample

Sample ID	109
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Maximum and minimum ages given are approximations based on average error of previous K-Ar dating.

Location

Latitude	32.772
Longitude	-108.104
Location	Kneeling Nun
State / province	New Mexico

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
33.4		32.4	34.4

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	66.7		WT%	EDXRF
AL2O3	15.1		WT%	EDXRF
FEO	4.3		WT%	EDXRF
MGO	1.6		WT%	EDXRF
CAO	2.2		WT%	EDXRF
NA2O	4.4		WT%	EDXRF
K2O	5.5		WT%	EDXRF
TOTAL	99.8		WT%	EDXRF

References

Bornhorst, Theodore Joseph (1980) Major- and trace-element geochemistry and mineralogy of upper Eocene to Quaternary volcanic rocks of the Mogollon-Datil volcanic field, southwestern New Mexico.