Sample 416

NavDat sample number 17878 · RHYODACITE

Sample

Sample ID	416
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	33.2917
Longitude	-108.681
Location	Apache springs
State / province	New Mexico

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
27.3		26.5	28.1

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	69.42		WT%	EDXRF
TIO2	0.5		WT%	EDXRF
AL2O3	14.78		WT%	EDXRF
FEO	0.39		WT%	EDXRF
FE2O3	1.7		WT%	EDXRF
MNO	0.05		WT%	EDXRF
MGO	0.43		WT%	EDXRF
CAO	0.48		WT%	EDXRF
NA2O	4.62		WT%	EDXRF
K2O	5.63		WT%	EDXRF
P2O5	0.03		WT%	EDXRF
H2O_PLUS	1.03		WT%	EDXRF
TOTAL	99.4		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.