Sample SO 28

NavDat sample number 37710 · ANDESITE

Sample

Sample ID	SO 28
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	28.4169
Longitude	-109.826
Location	Suaqui Grande area
State / province	Sonora

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
23.5		22.7	24.3

Analyses

Wr

Item	Value	Std. dev.	Unit	Method
SIO2	57.41		WT%	UNKNOWN
TIO2	0.74		WT%	UNKNOWN
AL2O3	17.08		WT%	UNKNOWN
FE2O3	5.69		WT%	UNKNOWN
FEO	0.4		WT%	UNKNOWN
MNO	0.09		WT%	UNKNOWN
MGO	2.99		WT%	UNKNOWN
CAO	6.44		WT%	UNKNOWN
NA2O	3.8		WT%	UNKNOWN
K2O	2.04		WT%	UNKNOWN
P2O5	0.26		WT%	UNKNOWN
H2O_MINUS	0.75		WT%	UNKNOWN
H2O_PLUS	0.91		WT%	UNKNOWN
CO2	0.02		WT%	UNKNOWN

References

McDowell, Fred W; Roldan Quintana, Jaime; Amaya Martinez, Ricardo (1997) Interrelationship of sedimentary and volcanic deposits associated with Tertiary extension in Sonora, Mexico. Geological Society of America Bulletin, vol.109, no.10, pp.1349-1360, Oct 1997 doi:10.1130/0016-7606(1997)109<1349:IOSAVD>2.3.CO;2