06.14.04	"Katherine Knox, Lang Farmer"	
GeoRef Data	 1991-007562	
TI	" Case study of an extensive silicic lava; the Bracks Rhyolite, Trans-Pecos Texas."	
AU	 Henry-Christopher-D; Price-Jonathan-G; Rubin-Jeffrey-N; Laubach-Stephen-E	
AF	" Univ. Tex. at Austin., Bur. Econ. Geol., Austin, TX, United States"	
SO	" Journal of Volcanology and Geothermal Research. 43; 1-4, Pages 113-132. 1990. ."	
PB	" Elsevier. Amsterdam, Netherlands. 1990."	
CP	 Netherlands	
PY	1990	
LA	 English	
DE	 Bracks-Rhyolite; breccia-; clastic-rocks; composition-; domes-; emplacement-; evolution-; igneous-rocks; lava-; lava-flows; outcrops-; petrology-; rhyolites-; sedimentary-rocks; siliceous-composition; Texas-; Trans-Pecos; United-States; volcanic-rocks	
CC	 05A-Igneous-and-metamorphic-petrology	
DT	 Serial	
BL	 Analytic	
IL	 Refs	" 58; illus. incl. 1 table, sketch map."
RF	" GeoRef, Copyright 2002, American Geological Institute."	
IS	 0377-0273																																								
CO	 JVGRDQ																																								
AN	 1991-007562																																								
UD	1991																																								
Sample Data																																									
Item	Age	Max_age	Min_age	Material	LatDD	LongDD	Loc_prec	SiO2	TiO2	Al2O3	Fe2O3	FeO	MnO	MgO	CaO	Na2O	K2O	P2O5	H2O+	CO2	Total	Y	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	F	LOCATION NAME	Rock_Type	Rock_Class	STATE
Unit	Ma	Ma	Ma		DD	DD	DD	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm				
Method	1	1	1		2	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4				
Sample Name																																									
H87-201	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	67.47	0.54	12.61	1.88	3.65	0.22	0.23	1.5	4.62	5.02		1.99	0.11	99.84	84	77	173	23	75	16	2.4	16	2.5	15	3	10.1	1.3	9.3	1.4		Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
J85-76	36.8	38	26	whole rock	30.5	-104.75	0.01	69.12	0.56	12.86	4.5	1.46	0.22	0.28	0.56	4.34	5.58	0.06	0.56		100.2	80	72	171	20	71	15	2.4	14		15		8.7		8.9	1.3	1000	Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
H87-197	36.8	38	26	whole rock	30.5	-104.75	0.01	68.03	0.52	13.03	5.79	0.13	0.08	0.31	0.56	4.59	5.27		0.69		99.06	82	75	157		69		2.4	15		14		9.4		8.6	1.3		Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
H87-199	36.8	38	26	whole rock	30.5	-104.75	0.01	68.45	0.52	13.05	5.26	0.68	0.16	0.24	0.57	4.46	5.43		0.56		99.48	79	87	173		87		2.6	16		16		8.9		8.9	1.2		Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
H87-203	36.8	38	26	whole rock	30.5	-104.75	0.01	67.09	0.54	12.66	2.15	3.2	0.2	0.26	1.59	4.29	4.8		2.64	0.15	99.57	84	75	168	21	73	16	2.4	16	2.6	15	2.9	10.2	1.3	9.4	1.4		Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
J85-72	36.8	38	26	whole rock	30.5	-104.75	0.01	69.52	0.54	12.58	4.3	1.68	0.16	0.29	1.16	4.56	5.23	0.06	0.48	0.22	100.79	76	71	156	19	70	14	2.2	15		14		9.1		7.7	1.2	700	Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
H87-204	36.8	38	26	whole rock	30.5	-104.75	0.01	68.61	0.53	13.03	4.32	1.4	0.17	0.4	1.15	3.89	6.81		0.61	0.32	99.43	71	68	152		66		2.2	15		14		8.9		7.9	1.2		Bracks Rhyolite	volcanic	Rhyolite Lava	Texas
H87-198	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	68.03	0.52	13.17	5.23	0.71	0.12	0.34	0.56	4.58	5.34		0.72		99.41	80	76	162		74		2.4	16		15		9.8		8.8	1.3		Bracks Rhyolite	volcanic	Trachyte Lava	Texas
H87-196	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	68.24	0.53	13.06	4.85	1.21	0.22	0.19	0.82	4.58	5.19		0.64		99.63	88	88	182		82		2.5	18		16		10.4		8.9	1.3		Bracks Rhyolite	volcanic	Trachyte Lava	Texas
H88-33	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	67	0.53	13.14	1.21	4.37	0.23	0.25	1.55	4.78	4.27		2.24	0.11	99.76	84	74	171		71		2.2	16		15		9.9		9	1.4	800	Bracks Rhyolite	volcanic	Trachyte Lava	Texas
H87-195	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	67.85	0.52	13.04	3.89	1.86	0.19	0.2	0.83	4.72	5.46		0.4		99.04	86	79	166		76		2.4	16		15		10.1		9	1.4	800	Bracks Rhyolite	volcanic	Trachyte Lava	Texas
H87-200	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	67.15	0.54	12.87	2.89	2.75	0.21	0.2	1.4	4.16	5.43		2.08		99.68	82	77	166	24	74	16	2.3	16	2.5	15	2.9	9.8	1.2	8.7	1.3		Bracks Rhyolite	volcanic	Trachyte Lava	Texas
H87-202	36.8	38	26	whole rock	30.5417	-104.6667	0.0001	67.06	0.53	12.6	4.74	0.9	0.13	0.3	0.39	4.23	5.99		0.54		99.29	84	77	177	21	74	16	2.5	15	2.4	15	2.9	8.7	1.2	9.1	1.4	700	Bracks Rhyolite	volcanic	Trachyte Lava	Texas
Method Data																																									
1	PER_COM	480	"D.S. Barker, 2004"																																						
2	PER_COM	480	"D.S. Barker, 2004"	decimal degrees converted from decimal minutes																																					
3	ICPAE	472																																							
4	ICPMS	472