US Mines listed rhyolite flows

Rhyolitic flows can have high concentrations of fluorine gas dissolved in the lava which allows the rhyolite to become more fluid. Fluorine gas is a key component in the formation of topaz. These mines listed have the potential to have topaz. I collected topaz crystals from a couple rhyolite locations in Colorado and Nevada. Almandine garnets are often found with topaz in rhyolite deposits.

Name	State	County	Lat	Long	Township	Range	Section
94 Rows	Data exported from DRC 3.04 (c) 2012 Gary Kindel
N/A	COLORADO	CUSTER	N/A	N/A	N/A	N/A	N/A
N/A	COLORADO	CUSTER	N/A	N/A	N/A	N/A	N/A
ALASKA GROUP	NEW MEXICO	SIERRA	33.43	-107.747778	010 S	009 W	22
ALLIED MINE GROUP E.	ALASKA	PA	56.906944	-134.291667	057 S	071 E	19
ANDIES MINE	NEVADA	LINCOLN	37.560833	-115.745833	005 S	056 E	04
ARIZONA STANDARD MINING AND MILL CO	ARIZONA	YAVAPAI	34.083056	-112.491944	009 N	002 W	32
BIG BUCK PROSPECT	NEVADA	LINCOLN	38.404167	-114.320833	006 N	068 E	02
BLACK BIRD PROSPECT (1930)	NEW MEXICO	SOCORRO	33.9286	-107.3531	N/A	N/A	N/A
BOLTON MINE	NEW MEXICO	GRANT	32.6525	-108.443333	019 S	016 W	24
BOSS-BIXBY DEPOSIT	MISSOURI	DENT, IRON	37.6425	-91.178889	034 N	002 W	17
BROWN MINE	NORTH CAROLINA	MOORE	35.423056	-79.622222	N/A	N/A	N/A
BUCKHORN PROPERTY	ARIZONA	YAVAPAI	34.012222	-112.470556	008 N	002 W	28
BYERTS TUNNEL	NEW MEXICO	SOCORRO	34.063889	-106.948056	003 S	001 W	09
CACTUS GROUP NOS. 1-12	NEVADA	HUMBOLDT	41.1444	-119.0958	N/A	N/A	N/A
CAMP GREGORY MINE	NEVADA	CHURCHILL	39.378333	-118.926111	018 N	027 E	33
CANARY	UTAH	BEAVER	38.381944	-112.54	028 S	006 W	09
CHAMPIE COPPER	ARIZONA	YAVAPAI	34.0775	-112.475833	009 N	002 W	33
CHARLOTTE GAY PLACER	IDAHO	CUSTER	44.323333	-114.718889	012 N	015 E	32
COPPEROPOLIS 23	ARIZONA	YAVAPAI	34.036389	-112.466667	008 N	002 W	16
CORNWALLIS PENINSULA	ALASKA	PA	56.925	-134.2	057 S	071 E	15
CORNWALLIS PENINSULA	ALASKA	PA	56.908333	-134.191667	057 S	071 E	23
CURLY WRIGHT	NEVADA	NYE	36.963889	-116.651389	011 S	048 E	30
DENVER MINE	CALIFORNIA	SAN BERNARDINO	35.041944	-115.192778	011 N	017 E	18
DIATOMITE DEPOSIT	NEVADA	PERSHING	40.238611	-118.7875	027 N	028 E	01
DML 6S CLAIM	UTAH	JUAB	39.733056	-112.583611	012 S	007 W	36
DONALDSON PROSPECT	OREGON	JACKSON	42.651389	-122.779722	033 S	001 W	35
EAGLE MOUNTAINS FLUORSPAR DISTRICT	TEXAS	HUDSPETH	30.9333	-105.0583	N/A	N/A	N/A
EARTH SCIENCE ALUNITE DEPOSIT	UTAH	BEAVER	38.275556	-113.524167	029 S	015 W	22
EASTERN MINE	NEVADA	LINCOLN	37.437778	-114.741111	006 S	065 E	08
ELKO PRINCE	NEVADA	ELKO	41.243889	-116.8	039 N	046 E	20
EUREKA PROSPECT	NEVADA	NYE	38.703889	-117.020556	010 N	044 E	22
F AND L MINE	NEVADA	ESMERALDA	37.9	-118.242778	001 N	033 E	36
FAIRVIEW	COLORADO	SAN JUAN	37.788889	-107.670833	041 N	007 W	20
FRISCO	ARIZONA	MOHAVE	35.211667	-114.415833	021 N	020 W	16
GAMBLE PLACER TIN PROSPECT	NEVADA	LANDER	40.945	-116.880833	035 N	045 E	02
GAMBLE TIN LODE PROSPECT	NEVADA	LANDER	40.964444	-116.882778	036 N	045 E	27
GOLDBANKS QUICKSILVER MINE	NEVADA	PERSHING	40.474444	-117.678611	030 N	038 E	14
GOLDEN ASTER	ARIZONA	YAVAPAI	34.094722	-112.454722	009 N	001 W	27
GRAVEL PIT	IDAHO	TETON	43.816111	-111.1475	006 N	045 E	28
GRAY PROSPECT	OREGON	LAKE	42.533889	-119.981389	035 S	023 E	14
GREAT LAKES CARBON CORP. SOCORRO DEPOSIT	NEW MEXICO	SOCORRO	34.0225	-106.9003	N/A	N/A	N/A
HALIFAX	NEVADA	NYE	38.071944	-117.206111	003 N	042 E	36
HANSON RANCH URANIUM	OREGON	JACKSON	42.641944	-122.905278	034 S	002 W	02
HOYT MINE	NEVADA	CHURCHILL	39.771944	-117.763889	022 N	037 E	13
H-Y	IDAHO	VALLEY	44.948333	-115.140278	019 N	011 E	29
JELINEK	NEVADA	CHURCHILL	39.202222	-118.184722	016 N	034 E	32
JOKER M S 1247	ARIZONA	YAVAPAI	34.078889	-112.459444	009 N	002 W	34
JUMBO GROUP	IDAHO	VALLEY	44.961389	-115.128889	019 N	011 E	29
KATHERINE RAND	ARIZONA	MOHAVE	35.228889	-114.546944	021 N	021 W	05
KEKU STRAIT LIMESTONE	ALASKA	PA	56.922222	-134.195833	057 S	071 E	14
LANDMARK-LIFE PRESERVER GROUP	NEVADA	NYE	37.288056	-116.785	007 S	046 E	36
LANGLEY	ARIZONA	SANTA CRUZ	31.380833	-110.692778	023 S	016 E	35
MAYFLOWER	NEVADA	LANDER	40.9656	-116.8603	N/A	N/A	N/A
MCDERMITT MINE	NEVADA	HUMBOLDT	41.920278	-117.810278	047 N	037 E	27
MODOC MINE	NEVADA	LANDER	40.531111	-117.181389	031 N	042 E	24
NAME UNKNOWN PERLITE DEPOSIT	NEW MEXICO	SIERRA	32.6814	-107.5183	N/A	N/A	N/A
NATIONAL MINE	NEVADA	HUMBOLDT	41.835556	-117.573333	046 N	039 E	27
NBMG SAMPLE SITE 1491	NEVADA	PERSHING	40.503333	-118.740278	031 N	029 E	32
NIVLOC MINE	NEVADA	ESMERALDA	37.716111	-117.757222	002 S	038 E	33
NORTH VEIN	IDAHO	LEMHI	44.856111	-114.498889	018 N	017 E	30
ORIGINAL GILBERT	NEVADA	ESMERALDA	38.11	-117.713056	003 N	038 E	16
PEAK CLAIMS (NOS.1-12)	NEVADA	LINCOLN	37.958611	-114.05	001 N	071 E	08
PITTSBURG SILVER	NEVADA	ELKO	41.818889	-115.690278	045 N	056 E	05
PORPHYRY DIKE	MONTANA	LEWIS AND CLARK	46.428056	-112.286389	008 N	006 W	24
POUGHKEEPSIE	COLORADO	SAN JUAN	37.940278	-107.625	042 N	007 W	03
PUMICE DEPOSIT	IDAHO	TETON	43.8111	-111.1442	N/A	N/A	N/A
RAMSEY MINE	ARIZONA	LA PAZ	33.628889	-113.978333	003 N	017 W	02
REED MINE	NORTH CAROLINA	CABARRUS	35.284444	-80.464444	N/A	N/A	N/A
ROCHESTER	NEVADA	PERSHING	40.289722	-118.2	028 N	034 E	16
ROCKLAND MINE	NEVADA	LYON	38.646667	-119.093611	009 N	026 E	17
ROGERS-BURNISON PROPERTY	NEVADA	HUMBOLDT	41.383333	-118.363889	041 N	032 E	35
ROWLEY	ARIZONA	MARICOPA	33.048889	-113.032778	004 S	008 W	25
SEVEN TROUGHS ROYAL GROUP	NEVADA	PERSHING	40.539167	-118.73	031 N	029 E	21
SHEPARD PROPERTY	NEVADA	NYE	36.948333	-116.638333	011 S	048 E	29
SILVER PROSPECT	NEVADA	PERSHING	40.332222	-118.2325	029 N	033 E	35
SILVER QUEEN	NEVADA	ESMERALDA	37.7625	-117.795278	002 S	038 E	18
STANDARD	IDAHO	VALLEY	44.951389	-115.136111	019 N	011 E	29
STONEWALL	NEW MEXICO	SOCORRO	34.093611	-107.190556	002 S	003 W	31
SWALLOW	ARIZONA	YAVAPAI	34.057778	-112.511389	008 N	002 W	06
T AND M PROSPECT	OREGON	DOUGLAS	42.798611	-122.787222	032 S	001 W	11
THUNDER MOUNTAIN	IDAHO	VALLEY	44.955556	-115.133611	019 N	011 E	29
TRINITY SILVER PROSPECT	NEVADA	PERSHING	40.396667	-118.610278	029 N	030 E	09
UNKNOWN PROSPECT	UTAH	MILLARD	39.444167	-112.851667	016 S	009 W	10
UNKNOWN PROSPECT	UTAH	MILLARD	39.431667	-112.846111	016 S	009 W	15
UNKNOWN PROSPECT	UTAH	MILLARD	39.494722	-112.965556	015 S	010 W	22
UNKNOWN PROSPECT	NEVADA	ELKO	40.7483	-114.2728	N/A	N/A	N/A
UNNAMED BASE METAL OCCURRENCE	NORTH CAROLINA	DAVIDSON	35.7022	-80.125	N/A	N/A	N/A
UTAH DEPT OF HIGHWAYS PIT NO 16001	UTAH	PIUTE	38.488611	-112.243333	027 S	003 W	06
VERMILLION	NEVADA	HUMBOLDT	41.3722	-118.2219	N/A	N/A	N/A
VERMILLION PROSPECT	NEVADA	HUMBOLDT	41.3722	-118.2219	N/A	N/A	N/A
WHIPSAW	ARIZONA	YAVAPAI	34.046944	-112.480278	008 N	002 W	08
WHITE CLAY PIT	UTAH	BOX ELDER	41.520278	-113.840278	009 N	017 W	07
WILD ROSE MINE	NEVADA	ESMERALDA	37.933333	-118.305278	001 N	033 E	21
ZALLA M MINE	WASHINGTON	FERRY	48.761944	-118.829167	038 N	032 E	30