Sample 1755

NavDat sample number 52783 · ANDESITE

Sample

Sample ID	1755
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	43.4908
Longitude	-112.684
Location	Eastern Snake River Plain volcanic field
State / province	Idaho

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.4		1.26	1.54

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	56.2		WT%	ICPAES
TIO2	2.24		WT%	ICPAES
AL2O3	13.7		WT%	ICPAES
FEOT	10.6		WT%	ICPAES
MNO	0.16		WT%	ICPAES
MGO	4.74		WT%	ICPAES
CAO	6.69		WT%	ICPAES
NA2O	2.89		WT%	ICPAES
K2O	2.33		WT%	ICPAES
P2O5	0.5		WT%	ICPAES
TOTAL	97.9		WT%	ICPAES
SR	206		PPM	ICPAES
BA	300		PPM	ICPAES
ZR	353		PPM	ICPAES

References

McCurry, Michael; Hayden, Karl P; Morse, Lee H; Mertzman, Stan (2008) Genesis of post-hotspot, A-type rhyolite of the Eastern Snake River Plain volcanic field by extreme fractional crystallization of olivine tholeiite.