Sample 1212

NavDat sample number 13109 · DACITE

Sample

Sample ID	1212
Alternate ID	491
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	19.2639
Longitude	-101.844
Location	Cerro Tipitarillo, Mich.
State / province	Michoacan

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
2		1	3	Quaternary

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	63		WT%	UNKNOWN
TIO2	0.7		WT%	UNKNOWN
AL2O3	16.38		WT%	UNKNOWN
FE2O3	1.01		WT%	UNKNOWN
FEO	2.56		WT%	UNKNOWN
MNO	0.02		WT%	UNKNOWN
MGO	3.55		WT%	UNKNOWN
CAO	5.3		WT%	UNKNOWN
NA2O	4.11		WT%	UNKNOWN
K2O	1.82		WT%	UNKNOWN
P2O5	0.17		WT%	UNKNOWN
H2O_PLUS	0.42		WT%	UNKNOWN
H2O_MINUS	0.18		WT%	UNKNOWN
TOTAL	99.22		WT%	UNKNOWN

References

Demant, Alain (1981) L'axe neo-volcanique transmexicain; etude volcanologique et petrographique; signification geodynamique: The Transmexican neo-volcanic axis; volcanologic and petrographic study; geodynamic significance.