Sample Z-22-4

NavDat sample number 1312 · ANDESITE

Sample

Sample ID	Z-22-4
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	34.1373
Longitude	-118.763
Location	Malibu Lake area of the western Santa Monica Mountains, Los Angeles County
State / province	California
Volcanic field	Conejo Volcanics

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
16.7		16.3	17.1	Miocene

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	58.11		WT%	UNKNOWN
AL2O3	16.06		WT%	UNKNOWN
FE2O3	1.5		WT%	UNKNOWN
FEO	4.46		WT%	UNKNOWN
MGO	6.3		WT%	UNKNOWN
CAO	5.71		WT%	UNKNOWN
NA2O	3.68		WT%	UNKNOWN
K2O	0.8		WT%	UNKNOWN
H2O_PLUS	1.13		WT%	UNKNOWN
H2O_MINUS	1.07		WT%	UNKNOWN
TIO2	0.95		WT%	UNKNOWN
P2O5	0.31		WT%	UNKNOWN
MNO	0.08		WT%	UNKNOWN
CO2	0.08		WT%	UNKNOWN

References

Blackerby, Bruce Alfred (1965) The Conejo Volcanics Miocene in the Malibu Lake area of the western Santa Monica Mountains, Los Angeles County, California.