Sample 20

NavDat sample number 5467 · BASALT

Sample

Sample ID	20
Rock name	BASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS

Location

Latitude	23.95
Longitude	-104.833
Location	Durango City
State / province	Durango
Formation	Metates Formation

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
12.2		11.3	13.9

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	49.9		WT%	UNKNOWN
TIO2	2.76		WT%	UNKNOWN
AL2O3	16.2		WT%	UNKNOWN
FE2O3	4.05		WT%	UNKNOWN
FEO	6.3		WT%	UNKNOWN
MNO	0.16		WT%	UNKNOWN
MGO	4.46		WT%	UNKNOWN
CAO	6.75		WT%	UNKNOWN
NA2O	4		WT%	UNKNOWN
K2O	2.94		WT%	UNKNOWN
H2O_PLUS	0.68		WT%	UNKNOWN
H2O_MINUS	0.18		WT%	UNKNOWN
P2O5	1.11		WT%	UNKNOWN
CO2	0.03		WT%	UNKNOWN

References

Swanson, E R; Keizer, R P; Lyons, J I; Clabaugh, S E (1978) Tertiary volcanism and caldera development near Durango City, Sierra Madre Occidental, Mexico. Geological Society of America Bulletin, vol.89, no.7, pp.1000-1012, Jul 1978 doi:10.1130/0016-7606(1978)89<1000:TVACDN>2.0.CO;2