Date File Created	Name of Creator
10/31/07	Sarah Evans
GeoRef Data	2006-060821
TI	"Petrology of the Crazy Mountains dike swarm and geochronology ofassociated sills, south-central Montana"
AU	"du Bray, Edward A; Harlan, Stephen S; Wilson, Anna B"
AF	"U. S. Geological Survey, USA,  (United States)"
SP	"USGS, Publications of the U. S. Geological Survey"
SO	"U. S. Geological Survey Professional Paper, Report: P 1715, 21 pp.,2006"
IS	1044-9612
RP	P 1715
DE	absolute age; Ar/Ar; Cenozoic; Crazy Mountains; dates; dike swarms;dikes; Eocene; Fort Union Formation; geochemistry; igneous rocks;intrusions; magmatism; mineral composition; Montana; Paleogene;plutonic rocks; sills; south-central Montana; Tertiary; United States;USGS; whole rock
AB	"The Crazy Mountains dike swarm is a radial array associated with theEocene (approximately 49 Ma) Big Timber stock in the Crazy Mountainsof south-central Montana. Dikes are hosted by the stock and byPaleocene Fort Union Formation rocks that host the stock. The spatialcoincidence, field relations, and similarity of petrographic andgeochemical features suggest that the dikes and the stock arecogenetic and coeval. The dikes depict a broad range of compositions,from rhyolite to basalt; dike composition is only weakly related toposition relative to the Big Timber stock. The dikes range from 51 to71 weight percent SiO2, a slightly more restricted range than thatexhibited by the stock. Compositional variation among the dikes isless systematic than is characteristic of the stock; dike compositionsform more broadly diffuse arrays and tend to be slightly morealkaline. Both of these factors could result from late-stagemagmatic-hydrothermal processes that seem to have weakly altered manyof the dikes. Major-oxide and trace-element characteristics of thedikes and the associated stock are consistent with a mantle-dominatedgenesis in a subduction-related volcanic arc setting. In addition topetrologic and geochemical data, new (super 40) Ar/ (super 39) Argeochronologic data for strongly alkaline sills in the northern CrazyMountains are also presented. Dates for the sills, which areperipheral to the Crazy Mountains dike swarm, indicate that alkalinemagmatism was temporally associated with subalkaline magmatismrepresented by the Big Timber stock and related dikes. Characteristicsof the subalkaline magmatism are consistent with renewed volcanic arcmagmatism during the Eocene westward hingeline retreat and subsequentsouthwestward migration of the magmatic front in response tosteepening subduction along the western edge of North America."
LA	English
FE	"References: 38; illus. incl. 3 tables, geol. sketch maps"
PY	2006
PT	Serial; Report; Monographic
CP	United States (USA)																																					
LL	"Latitude:N450000,N463000 Longitude:W1090000,W1110000"																																					
CL	05A Igneous and metamorphic petrology; 03 Geochronology																																					
CY	"GeoRef, Copyright 2007, American Geological Institute."																																					
UD	200617																																					
AN	2006-060821																																					
Sample Data																																						
Item	SiO2	Al2O3	Fe2O3	FeO	MgO	CaO	Na2O	K2O	TiO2	P2O5	MnO	LOI	Rb	Sr	Y	Zr	Nb	Ba	La	Ce	Nd	Max_age	Min_age	Age	Max_age	Min_age	Age	Max_age	Min_age	LatDD	LongDD	Loc_prec	Location_Name	Rock_Type	Rock_Class	Material	Sample_description	State
Units	wt %	wt %	wt %	wt %	wt %	wt %	wt %	wt %	wt %	wt %	wt %	wt %	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	Ma	Ma	Ma	Ma 	Ma 	Ma	Ma 	Ma 	DD	DD							
Method	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	3	3	5	5	5	6	6	6	4	4							
Sample Name																																						
202306	63.44	16.12	0.54	4.4	2.58	3.86	4.55	3.14	0.99	0.3	0.08	1.95	58	804	16	185	16	1567	46	70	32	50.5	49.5							46.0219	-110.3085	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202308	59.16	16.1	0.74	5.99	2.91	4.94	4.93	3.24	1.41	0.48	0.09	0.76	57	1003	22	198	20	1897	68	99	22	50.5	49.5							46.0198	-110.2908	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202310	62.51	18.05	0.47	3.79	1.43	3.83	4.83	3.73	0.96	0.33	0.07	1.16	77	788	29	275	29	1806	60	110	62	50.5	49.5							46.0256	-110.2897	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202332	56.57	18.72	0.73	5.95	3.17	7.92	3.37	1.9	1.11	0.43	0.12	2.16	27	1090	28	149	21	1338	47	90	24	50.5	49.5							46.0911	-110.2182	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202337	57.87	14.77	0.93	7.53	5.26	5.42	3.71	2.87	1.1	0.38	0.15	0.45	83	726	24	237	14	1418	72	86	55	50.5	49.5							46.0386	-110.2878	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202401	55.31	17.19	0.94	7.63	4.08	7.48	3.29	2.12	1.26	0.53	0.16	1.77	29	994	34	176	25	1643	63	103	66	50.5	49.5							46.0733	-110.4332	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202402	58.35	17.29	0.81	6.57	2.68	5.74	3.68	2.96	1.34	0.45	0.13	2.41	65	791	35	202	22	1526	55	85	30	50.5	49.5							46.0783	-110.446	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202501	58.05	16.34	0.74	6.02	4.01	5.8	4.15	2.96	1.37	0.44	0.12	0.05	68	1053	23	179	25	1698	53	96	19	50.5	49.5							46.0389	-110.3548	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202502	59.31	18.31	0.6	4.84	2.12	5.35	4.46	3.39	1.09	0.43	0.11		76	1008	27	173	22	1632	62	92	32	50.5	49.5							46.0389	-110.3548	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202503	67.02	16.17	0.37	3.01	1.12	2.41	4.36	4.61	0.64	0.21	0.07	0.33	125	493	14	328	16	1341	49	86	28	50.5	49.5							46.0404	-110.35	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202508	59.26	17.69	0.51	4.15	2.38	6.67	4.14	3.57	1.13	0.43	0.08	0.16	53	885	30	208	22	1611	42	78	59	50.5	49.5							46.0223	-110.3369	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202510	56.28	16.23	0.85	6.9	4.38	6.2	4	3.29	1.32	0.45	0.09	3.38	74	762	22	195	23	1450	28	75	33	50.5	49.5							46.0322	-110.3331	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202513	55.5	16.62	0.91	7.38	4.86	7.21	3.24	2.31	1.39	0.45	0.13	2.74	40	817	20	157	14	1205	48	82	29	50.5	49.5							46.0749	-110.4189	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202514	58.08	17.49	0.74	5.98	3.17	5.25	4.17	3.28	1.27	0.45	0.12	2.2	69	895	30	189	29	1577	55	11	51	50.5	49.5							46.0738	-110.4218	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202515	59.77	17.86	0.7	5.7	2.08	5.12	4.19	3.06	0.89	0.5	0.13	1.79	69	925	31	182	17	1674	53	103	60	50.5	49.5							46.0738	-110.4218	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202516	53.39	16.16	0.98	7.92	5.35	7.84	3.86	2.41	1.12	0.81	0.16	1.89	28	2059	36	147	28	2658	125	230	77	50.5	49.5							46.066	-110.4297	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202517	57.62	16.32	0.8	6.51	4.45	6.63	3.22	2.82	1.09	0.4	0.12	1.89	43	664	13	114	15	1448	45	77	45	50.5	49.5							46.0338	-110.4224	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202601	58.44	17.24	0.79	6.39	2.84	5.39	4.31	2.78	1.23	0.46	0.12	0.44	71	860	16	210	23	1470	44	74	22	50.5	49.5							46.0103	-110.3046	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202602	65.23	17	0.4	3.21	1.15	2.47	5.05	4.35	0.86	0.23	0.05	1.43	87	575	18	306	28	2063	59	118	46	50.5	49.5							46.0103	-110.3046	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202603	58.33	16.77	0.78	6.35	3.56	5.49	4.25	2.94	1	0.41	0.11	0.68	47	987	24	161	16	2255	48	83	51	50.5	49.5							46.0103	-110.3046	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202604	57.44	17.71	0.77	6.25	2.27	5.41	4.81	3.27	1.17	0.77	0.13	2.56	59	1312	21	264	30	1924	67	121	66	50.5	49.5							46.0103	-110.3046	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202606	53.95	16.46	1.04	8.39	4.68	5.96	4.85	2.15	1.8	0.57	0.16	1.44	42	897	25	173	30	1301	50	93	49	50.5	49.5							46.0045	-110.3037	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202607	69.62	15.9	0.22	1.77	1.01	2.73	4.53	3.67	0.38	0.15	0.03	4.3	58	772	6	105	8	2680	40	45	26	50.5	49.5							46.0597	-110.2932	0.001	Crazy Mountains	Plutonic	Rhyolite	whole rock		Montana
202611	56.58	18.28	0.72	5.81	2.35	5.34	5.3	3.38	1.55	0.59	0.08	0.04	69	1192	28	206	25	1826	86	108	42	50.5	49.5							46.0595	-110.3055	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202617	55.31	17.22	0.98	7.92	3.62	5.14	3.72	4	1.41	0.54	0.15	2.48	81	700	27	157	19	1812	74	88	36	50.5	49.5							46.1195	-110.2748	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202618	59.66	18.91	0.54	4.36	1.84	4.62	4.93	3.54	1.1	0.43	0.08	2.74	68	925	22	225	21	1960	79	114	40	50.5	49.5							46.1208	-110.2747	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202619	54.14	14.09	0.89	7.21	8.23	8.42	2.85	2.51	1.07	0.44	0.14	3.19	54	764	14	147	17	1270	42	117	36	50.5	49.5							46.1194	-110.2773	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202620	51.27	16.06	1.2	9.73	5.48	8.07	3.04	2.63	1.93	0.44	0.16	4.04	66	842	29	131	20	1097	31	67	34	50.5	49.5							46.1225	-110.2736	0.001	Crazy Mountains	Plutonic	Basalt 	whole rock		Montana
202621	61.17	17.18	0.66	5.38	2.35	4.56	4.46	2.92	0.76	0.45	0.11	1.55	56	1018	26	194	18	2263	64	112	39	50.5	49.5							46.1232	-110.2711	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202622	62.61	17.18	0.56	4.5	1.7	3.66	5.15	3.5	0.59	0.42	0.13	1.37	60	1418	39	230	39	3104	143	189	77	50.5	49.5							46.1243	-110.2691	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202625	57.24	16.68	0.87	7.04	3.54	5.31	3.94	3.66	1	0.59	0.13	1.21	68	1242	28	198	14	2292	85	105	66	50.5	49.5							46.1263	-110.2636	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202704	56.98	17	0.86	6.99	3.02	5.71	4.42	2.78	1.62	0.48	0.14	2.44	45	904	21	147	29	1297	63	111	16	50.5	49.5							46.0437	-110.2951	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202705	69.3	15.39	0.28	2.27	1.4	3.63	3.19	3.91	0.45	0.15	0.05	5.21	55	665	8	113	12	2658	47	51	37	50.5	49.5							46.0525	-110.3275	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202707	60.75	16.09	0.62	5.03	3.3	4.57	4.76	3.2	1.22	0.38	0.08	1.59	67	687	21	180	22	1754	66	85	55	50.5	49.5							46.0478	-110.3317	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202712	70.81	15.18	0.24	1.96	0.59	1.84	4.55	4.25	0.4	0.13	0.05	0.08	97	660	13	204	24	2177	58	85	48	50.5	49.5							46.0401	-110.3263	0.001	Crazy Mountains	Plutonic	Rhyolite	whole rock		Montana
202714	64.53	16.49	0.47	3.83	1.69	3.53	4.85	3.42	0.76	0.34	0.08	0.06	70	949	18	216	30	2077	84	112	52	50.5	49.5							46.0378	-110.3158	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202717	60.11	17.94	0.61	4.94	2.23	4.83	4.27	3.43	1.11	0.42	0.1	1.59	81	834	28	189	23	1693	70	78	72	50.5	49.5							46.0727	-110.3206	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202718	61.66	15.73	0.59	4.75	3.96	4.74	4.24	2.89	0.99	0.36	0.09	2.79	50	823	16	185	23	1988	55	84	28	50.5	49.5							46.0482	-110.3384	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202724	58.68	16.48	0.78	6.34	3.51	5.37	4.12	2.81	1.45	0.38	0.08	0.5	56	867	17	161	23	1687	46	63	37	50.5	49.5							46.0654	-110.3206	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202725	51.06	14.56	1.37	11.12	6.61	6.83	3.3	2.15	2.08	0.74	0.19	1.536	70	798	30	152	20	868	56	91	50	50.5	49.5							46.0697	-110.3185	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202726	68.33	15.59	0.35	2.83	1.83	2.43	3.8	4.15	0.49	0.16	0.04	2.53	66	876	12	113	13	2723	47	60	34	50.5	49.5							46.0697	-110.3185	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202734	63.34	17.04	0.54	4.35	1.57	4.01	4.66	3.38	0.56	0.42	0.12	0.72	72	1249	31	210	24	2619	73	129	29	50.5	49.5							46.1098	-110.3867	0.001	Crazy Mountains	Plutonic	Dacite	whole rock	Trachyte	Montana
202735	55.2	17.29	0.88	7.11	4.45	7.4	3.39	2.48	1.24	0.42	0.13	1.84	51	1011	23	167	17	1536	51	86	35	50.5	49.5							46.1098	-110.3867	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202736	55.89	16.58	0.85	6.91	5.17	6.93	3.19	2.67	1.25	0.43	0.13	2.55	58	868	21	160	18	1449	52	86	43	50.5	49.5							46.1054	-110.3934	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202737	53.03	14.37	1.09	8.81	8.13	8.22	2.5	1.77	1.54	0.38	0.15	3.79	34	695	18	131	19	1024	48	63	27	50.5	49.5							46.1115	-110.3928	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202738	55.74	16.03	0.92	7.45	4.51	5.67	5.05	2.76	1.12	0.62	0.15	2.14	50	991	22	164	19	2019	59	120	47	50.5	49.5							46.1129	-110.3916	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202739	54.33	18.63	0.87	7.08	3.43	7.43	3.77	2.5	1.3	0.52	0.14	1.8	42	1117	26	176	20	1638	46	102	49	50.5	49.5							46.1291	-110.4061	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202740	54.57	16.04	0.98	7.94	5.22	6.76	4.45	1.84	1.14	0.89	0.16	5.98	29	1175	33	294	62	2685	95	172	87	50.5	49.5							46.1291	-110.4061	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
202741	58.51	16.97	0.76	6.17	3.51	5.24	4.23	3.03	1.02	0.45	0.11	1.56	53	903	22	205	14	1838	67	79	49	50.5	49.5							45.9942	-110.352	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202742	57.01	17.51	0.83	6.76	3.04	5.18	4.77	3.06	1.25	0.44	0.14	1.94	61	1085	19	172	21	1810	30	93	10	50.5	49.5							45.9856	-110.3523	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202743	57.2	16.67	0.86	7	3.59	5.45	4.13	3.47	0.95	0.52	0.16	2.43	84	1009	23	161	16	1816	36	105	51	50.5	49.5							45.9856	-110.3523	0.001	Crazy Mountains	Plutonic	Andesite	whole rock	Trachyandesite	Montana
202744	56.68	17.44	0.89	7.24	3.66	6.46	4.56	0.8	1.63	0.51	0.13	6.07	12	1739	31	154	27	810	32	97	29	50.5	49.5							45.9652	-110.3527	0.001	Crazy Mountains	Plutonic	Basaltic Andesite	whole rock		Montana
82VP-2																								50.61	50.75	50.47				46.2023	-110.4592	0.0001	Crazy Mountains	Plutonic	Trachyte	mineral	Sill	Montana
202338																											50.1	50.22	49.98	46.9943	-110.4479	0.0001	Crazy Mountains	Plutonic	syenite	mineral	Mafic Nepheline Syenite Sill	Montana
83VP-75																											50.1	50.29	49.91	46.1873	-110.4918	0.0001	Crazy Mountains	Plutonic	syenite	mineral	Mafic Nepheline Syenite Sill	Montana
83VP-65																											50.03	50.14	49.92	46.1875	-110.4637	0.0001	Crazy Mountains	Plutonic	syenite	mineral	Mafic Nepheline Syenite Sill	Montana
83VPCC-1																											50.06	50.23	49.89	46.2984	-110.4453	0.0001	Crazy Mountains	Plutonic	syenite	mineral	Mafic Nepheline Syenite Dike	Montana
83VPCC-12																											50.22	50.37	50.07	46.307	-110.499	0.0001	Crazy Mountains	Plutonic	syenite	mineral	Mafic Nepheline Syenite Stock	Montana
Method Data																																						
1	XRF	106																																				
2	XRF-EDS	106																																				
3	REG_COR:UNK	106																																				
4	SCAN	2006-060821																																				
5	AR-AR:HB	118	2006-058742	"""Weighted mean age."""																																		
6	AR-AR:Plateau Age:Bio 	118	2006-058742																																			
Reference Data																																						
Georef#	2006-058742																																					
TI	"(super 40) Ar/ (super 39) Ar dates from alkaline intrusions in thenorthern Crazy Mountains, Montana; implications for the timing andduration of alkaline magmatism in the central Montana alkalicprovince"																																					
AU	"Harlan, Stephen S"																																					
AF	"George Mason University, Department of Environmental Sciences andPolicy, Fairfax, VA, United States (USA)"
SO	"Rocky Mountain Geology, vol.41, no.1, pp.45-55, Jun 2006"
DE	Absaroka-Gallatin volcanic field; absolute age; alkalic composition;amphibole group; Ar/Ar; basement tectonics; biotite; Cenozoic; centralMontana; chain silicates; clinoamphibole; Cordilleran Orogeny; CrazyMountains; dates; decollement; dike swarms; Disturbed Belt;emplacement; faults; folds; geometry; hornblende; igneous rocks;intrusions; laccoliths; magmas; magmatism; mica group; Montana; NorthAmerica; Paleogene; partitioning; Rocky Mountains; sheet silicates;silicates; sills; tectonics; Tertiary; thin-skinned tectonics; thrustfaults; trachytes; United States; volcanic rocks; west-centralMontana
AB	"Intrusive rocks in the Crazy Mountains, Montana, consist of numerousstocks, dike swarms, laccoliths and/or sills of strongly alkaline tosubalkaline affinity that have intruded and metamorphosed Tertiarysedimentary strata of the Crazy Mountains Basin. The subalkaline rocksform stocks, sills, and radiating dikes and are located primarily inthe southern Crazy Mountains (e.g., Big Timber stock, Loco Mountainstock). With the exception of the Ibex Mountain sill (?), the alkalinerocks are restricted to the northern Crazy Mountains. New (super 40)Ar/ (super 39) Ar dates are reported for alkaline rocks of thenorthern Crazy Mountains, with results ranging between 50.61 Ma and50.03 Ma. Five dates from the strongly alkaline nepheline and maficnepheline syenites of the Ibex Mountain sill (?), Robinson anticlineintrusive complex, and Comb Creek stock (?) and dike swarm givetightly clustered dates suggesting that they were emplaced during arestricted time interval at approximately 50.1 Ma. The dates from thealkaline rocks of the northern Crazy Mountains are slightly older thanthose previously reported from the subalkaline Big Timber stock in thesouthern Crazy Mountains (i.e., 49.3-49.2 Ma, biotite (super 40) Ar/(super 39) Ar) (du Bray and Harlan, 1996). However, the limited spanof dates (i.e., 50.6-49.2 Ma) and the geographic proximity between thealkaline and subalkaline rocks indicate that the magmas represented bythese different geochemical groups were closely associated in bothtime and space. Furthermore, all the igneous rocks in the CrazyMountains were emplaced in a narrow time interval of 1-2 m.y. On aregional scale, the 51-49-Ma age span from the Crazy Mountains issimilar to that of most of the igneous centers of the central Montanaalkalic province and is coeval with the peak of widespread volcanismin the Absaroka-Gallatin volcanic field immediately to the south ofthe Crazy Mountains Basin."
LA	English
FE	"References: 38; illus. incl. 2 tables, sketch maps"
PY	2006
PT	Serial; Analytic
CP	United States (USA)
CL	05A Igneous and metamorphic petrology; 03 Geochronology
CY	"GeoRef, Copyright 2007, American Geological Institute. Abstract,copyright, University of Wyoming | Reference includes data fromGeoScienceWorld, Alexandria, VA, United States"
UD	200616
AN	2006-058742