Sample B157

NavDat sample number 10427

Sample

Sample ID	B157
Rock type	VOLCANIC
Material	IGNEOUS

Location

Latitude	40.4492
Longitude	-121.496
State / province	California
Volcanic field	Lassen volcanic center
Location comment	West of Crumbaugh Lake

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.53		0.45	0.6	Quaternary

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.92		WT%	UNKNOWN
AL2O3	17.58		WT%	UNKNOWN
FEO	5.79		WT%	UNKNOWN
MGO	3.31		WT%	UNKNOWN
CAO	6.57		WT%	UNKNOWN
NA2O	3.91		WT%	UNKNOWN
K2O	1.87		WT%	UNKNOWN
TIO2	0.75		WT%	UNKNOWN
P2O5	0.2		WT%	UNKNOWN
MNO	0.1		WT%	UNKNOWN

References

Clynne, Michael A. (1984) Open-File Report - U. S. Geological Survey, Report: OF 84-0224, 178 pp., 1984