Sample R.1

NavDat sample number 33447 · TRACHYBASALT

Sample

Sample ID	R.1
Rock name	TRACHYBASALT
Rock type	PLUTONIC
Composition	MAFIC
Material	IGNEOUS

Location

Latitude	39.83
Longitude	-105.24
Location	Ralston Sill
State / province	COLORADO
Formation	Ralston Sill

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
63.5		58.5	68.5

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	56.2		WT%	UNKNOWN
AL2O3	14.4		WT%	UNKNOWN
TIO2	0.75		WT%	UNKNOWN
FE2O3	4.5		WT%	UNKNOWN
FEO	5		WT%	UNKNOWN
MNO	0.06		WT%	UNKNOWN
CAO	6.6		WT%	UNKNOWN
MGO	7.5		WT%	UNKNOWN
K2O	3.1		WT%	UNKNOWN
NA2O	2.8		WT%	UNKNOWN
P2O5	0.3		WT%	UNKNOWN
TOTAL	101		WT%	UNKNOWN

References

Larson, Edwin E; Drexler, John W Early Laramide mafic to intermediate volcanism, Front Range, Colorado. Colorado School of Mines Quarterly, vol.83, no.2, pp.41-52, 1988