intrusion_name in_nam_src age age_src best_age modal_composition comp_src Agnes Tertiary-Jurassic 119 Granodiorite-monzogranite 119 Aiken Creek 80 58 125 58 Granodiorite-monzogranite 80 Andorno 194 Tertiary-Cretaceous 9 Granodiorite 9 Antelope Canyon Tertiary-Cretaceous 70 Intrusive rock 70 Antelope Range 94 184 94 Granodiorite 184 Arabia 118 Cretaceous 115 Granodiorite 118 Austin 110 106-161 "125, 129, 140, 149, 175" 159 Monzogranite-granodiorite 110 Austin Creek Tertiary-Cretaceous 9 Granodiorite 9 Bald Mountain 18 139-169 "143, 169, 175" 159 Granodiorite-monzogranite 169 Barrel Spring Tertiary-Cretaceous 9 Granodiorite 9 Barth 43 Tertiary-Jurassic 46 Quartz monzonite 43 Baxter Spring 75 Cretaceous-Jurassic 75 Granodiorite 75 Bearpaw Mountain 20 75 127 75 Granite 16 Bell Canyon 19 96 19 Dacite 96 Belmont 78 73-84 "129, 141, 181" 84 Monzogranite 73 Big Chief Mine 75 Cretaceous-Jurassic 75 Granodiorite 75 Big Den Creek Tertiary 92 Dacite 92 Big Spring 75 Cretaceous-Jurassic 75 Diorite 75 Bilk Creek 184 93-97 184 95 Granite-quartz monzonite 2 Birch 110 75 110 75 Granite 110 Black Hills 86 Cretaceous-Jurassic 86 Quartz monzodiorite 86 Black Ridge Triassic-Permian 119 Leucogranite 119 Black Rock Canyon Cretaceous 115 Granodiorite 115 Bloody Run 194 Tertiary-Cretaceous 9 Granodiorite 184 Blue Mountain Cretaceous-Jurassic 9 Gabbroic rocks 9 Bluff Area 8 39 163 39 Monzogranite 8 Boulder Valley 42 38 173 38 Dacite 42 Box Canyon Antelope Cretaceous 115 Granodiorite 115 Box Canyon Ruby Jurassic 20 Granite 20 Box Canyon Stillwater Miocene 99 Rhyolite 99 Boyd Canyon Tertiary-Cretaceous 70 Intrusive rock 70 Buckingham 62-88 163 88 Leucogranite 102 Buckskin Mountain 18 147 18 Rhyolite 3 Buffalo Hump Tertiary 92 Dacite 92 Buffalo Mountain 131 146-161 "125, 131, 181" 155 Monzogranite 121 Buffalo Valley 88 193 88 Monzogranite-granodiorite 193 Burnt Cabin Summit Tertiary 92 Dacite 92 Butte Valley Egan Tertiary 58 Monzogranite-quartz monzonite 58 Butte Valley north Tertiary 20 Granite 20 Butte Valley south Tertiary 20 Granite 20 Buttermilk Creek Tertiary-Cretaceous 9 Granodiorite 9 Cain Creek 181 159 181 159 Granodiorite 181 Campbell Creek Miocene 109 Rhyolite 81 Canyon Creek 3 18 147 18 Rhyolite 3 Carseley Creek 80 Cretaceous 70 Monzogranite-granodiorite 80 Cavanaugh Wash Cretaceous 115 Granodiorite 115 Cave Canyon 150 44 150 Granite 44 Cedar Pass 83 24 171 24 Monzogranite 83 Central Canyon 68-93 "149, 188" 91 Granodiorite 132 Chalk Mountain 95 Cretaceous 95 Quartz monzonite-monzogranite 95 Chalk Wells Tertiary 92 Andesite 92 Chase Spring Tertiary-Cretaceous 32 Diorite 32 Cherry Creek 57 32 57 32 Monzogranite 57 Cherry Spring Cretaceous 20 Granite 20 Clear Creek 115 Jurassic 115 Granodiorite 115 Clearwater Canyon Tertiary-Cretaceous 9 Granodiorite 9 Clipper Gap 69 154 181 154 Granodiorite 69 Clover Creek Cretaceous 1 Dacite 1 Cocomongo 33-35 "138, 151" 34 Monzogranite-quartz monzonite 58 Coffeepot 16 93-105 172 104 Granite 16 Coldbanks Hills Triassic 115 Leucogranite 115 Columbia 12 150 197 150 Quartz diorite 12 Connors Creek 186 175 186 Aplite 169 Contact 22 124-156 "127, 160, 167" 156 Granodiorite 22 Copper Canyon 181 39 "181, 187" 39 Granodiorite-monzogranite "103, 104" Copper Mountain 89 158-161 156 161 Granodiorite 89 Corral Creek 39 36 39 36 Monzogranite 39 Cottonwood Creek east Jurassic 17 Diorite 17 Cottonwood Creek west 20 88-91 126 90 Granodiorite 20 Cove 60 Jurassic 60 70 Monzogranite-syenogranite 60 Craig Canyon 75 Cretaceous-Jurassic 75 Granodiorite 75 Crane Canyon Tertiary-Cretaceous 70 Intrusive rock 70 Crethers Springs Tertiary 63 Dacite 63 Currant 52 Tertiary 52 Rhyolite 198 Curtis Spring Jurassic 20 Quartz monzodiorite 198 Danner 68-93 "149, 188" 91 Granodiorite 132 Davey Town Tertiary-Cretaceous 9 Granodiorite 184 Davis Tunnel 20 37 139 37 Rhyolite 27 Deadman Creek 31-100 "127, 151" 100 Tonalite 65 Deep Canyon Miocene-Oligocene 196 Rhyolite 196 Delcer Buttes 153 122 153 Granodiorite 198 DeLong 1 Jurassic 1 Diorite 1 Desert Valley Cretaceous-Jurassic 9 Diorite 9 Devils Gate Canyon Pliocene-Miocene 76 Dacite 76 Diamond Peak 47 Oligocene-Eocene 47 Granodiorite 47 Disaster Peak 184 Tertiary-Cretaceous 9 Granodiorite-quartz diorite 184 Dobbin Summit 70 Tertiary-Cretaceous 70 Diorite 70 Donna Schee 9 Tertiary-Cretaceous 9 Quartz diorite 9 Dry Canyon 78 36 191 36 Granodiorite 73 Dry Lake Flat Jurassic 20 Granodiorite 198 Duck Creek Tertiary 51 Quartz monzodiorite 198 Duckwater Tertiary 70 Quartz diorite 70 Duff Creek 44 128-157 "122, 135, 140" 157 Granodiorite 44 Dutch Flat 4 Cretaceous 4 Granodiorite 4 East Humboldt Cretaceous 20 Dacite 198 East Range Jurassic 112 Quartz monzonite 112 Eastgate Tertiary 92 Rhyolite 92 Edna Mountain 103-104 "5, 6" 104 Quartz monzodiorite "5, 6" Eightmile Canyon 64 Tertiary-Cretaceous 64 Pegmatite and aplite 64 Elder Creek 8 38 "181, 187" 38 Monzogranite 8 Ellsworth 75 Cretaceous 75 Granite 75 Enright Hill 13 110 13 110 Granodiorite 198 Eugene 68-93 "149, 188" 91 Granodiorite 132 Farrel Canyon Cretaceous-Jurassic 4 Basalt 4 Ferber Hills Cretaceous 20 Granite 20 Ferguson Flat Tertiary-Cretaceous 31 Granite-granodiorite 31 Florida Canyon Triassic-Permian 117 Rhyolite 117 Flynn 194 Tertiary-Cretaceous 9 Granodiorite 184 Forge 188 68-93 "149, 188" 91 Granodiorite 132 Fourmile Canyon Triassic 88 Quartz-feldspar porphyry 88 Fourmile Creek Oligocene-Eocene 20 Rhyolite-dacite 20 Fourth Canyon Tertiary-Cretaceous 77 Quartz monzonite 77 Franklin Lake 84 148 84 Granite 148 Freehill Creek 35 151 35 Granodiorite 151 Freeman Creek 99 22-23 90 23 Granite-granodiorite 99 French Boy Canyon Miocene-Oligocene 114 Monzogranite-granodiorite 114 Gabbs 75 Cretaceous "75, 149" Granodiorite 75 Gabbs Valley Cretaceous 146 Granodiorite 89 Gabbs Valley Range Jurassic 167 Monzogranite 167 Gabbs Wash Cretaceous 92 Granitic rock 92 Garden Canyon Triassic 114 Rhyolite 115 Garfield Hills Cretaceous-Jurassic 91 Monzogranite 91 Gillis Range 89-94 133 92 Quartz monzonite 91 Giroux Mountain 101 Cretaceous 101 Granodiorite 101 Glidden Canyon 68-93 "149, 188" 91 Granodiorite 132 Goat Ridge 181 36 "164, 181" 36 Granodiorite 181 Golconda Summit 99-101 "5, 6" 100 Granodiorite "5, 6" Gold Coin Miocene 96 Andesite 96 Goldstrike 40 158-159 175 158 Granodiorite 40 Grand Trunk 115 159-172 "167, 179" 172 Quartz monzonite 167 Granite Mountain 45 38-40 "135, 164, 181" 39 Granodiorite 45 Granite Peak East Range 29 158 29 Quartz monzonite-monzogranite 114 Granite Peak Santa Rosa 194 Tertiary-Cretaceous 9 Granodiorite 9 Grass Valley north 130 168 130 168 Granite 130 Grass Valley south 172 181 172 Monzogranite-granodiorite 108 Green Mountain 39 36 39 36 Monzogranite 39 Grubbs Canyon Tertiary 49 Dacite 49 Hammond Canyon 156 126 156 Granite 198 Happy Creek 1 173 1 173 Monzogranite-granodiorite 1 Haystack Butte Cretaceous 115 Granodiorite 115 Heusser Mountain 34 140 34 Monzogranite 140 Hill 6010 8 Oligocene-Eocene 8 Granodiorite 8 Hilltop 39 181 39 Granodiorite 181 Hinkley Summit Tertiary 9 Dacite 9 Holly Well Cretaceous 75 Granodiorite 85 Hoodoo 60 25 151 70 Monzogranite-syenogranite 60 Horse Canyon 105 Tertiary 105 Rhyolite 105 Horse Heaven Cretaceous "13, 14" Granite "13, 14" Hot Springs north 4 Cretaceous 4 Granodiorite 4 Hot Springs south 4 Cretaceous 4 Granodiorite 4 Humboldt 185 154-164 "123, 185" 159 Gabbroic rocks 92 Humboldt River Cretaceous 115 Granodiorite 115 Idlewild Creek 76 Miocene 76 Rhyolite 76 Illinois 75 48-103 "141, 149" 103 Monzogranite 85 Imlay View 68-93 "149, 188" 91 Granodiorite 132 Indian Creek Tertiary-Jurassic 46 Granitic rock 46 Indian Peak Triassic-Permian 119 Rhyolite 119 Indian Springs 21 137-139 21 138 Monzogranite-granodiorite 21 Indian Valley 23 162 23 Quartz latite 162 Ione 77 Cretaceous 70 Quartz diorite 77 Ione Canyon 76 Miocene 76 Rhyolite 76 Iowa Creek 70 181 70 Granodiorite 181 IXL 99 26-28 "90, 170" 26 Quartz monzodiorite-granodiorite 99 Jackson Creek Cretaceous-Jurassic 1 Dacite 1 Jakes Valley Tertiary 51 Rhyolite 198 Jersey Canyon Jurassic 115 Diorite 115 Jett Canyon 82 30 82 30 Quartz monzonite 82 Johnson Canyon Tertiary-Jurassic 110 Diorite 110 Kennedy 158 29-30 "115, 158, 181" 29 Diorite-quartz monzodiorite 114 Kennedy Pass 29-30 "115, 158, 181" 29 Monzogranite-granodiorite 114 King Peak 160 148 160 Granite 38 Kingsley 35 38-54 "35, 140" 38 Monzogranite 35 Kious Basin-Young Canyon 23 17-28 "152, 190" 28 Monzogranite 53 Kramer-Osgood Cretaceous 75 Granodiorite 85 Krum Hill Tertiary-Cretaceous 9 Granodiorite 9 La Plata Canyon 94 85 134 85 Granite-quartz monzonite 94 Lamberson Canyon Triassic 114 Rhyolite 115 Lamoille Canyon Jurassic 20 Granite 20 Lavender 85 Cretaceous 75 Quartz monzodiorite-quartz monzonite 85 Lebeau Creek 76 Miocene 76 Rhyolite 76 Lee Peak 96-134 "130, 181" 134 Granodiorite 112 Lehman Creek 27 152 27 Granite 68 Lewis Canyon Tertiary 45 Quartz diorite 45 Lexington Creek 144 64-85 "122, 137, 151, 157" 85 Monzogranite 54 Lodi Hills 75 Cretaceous 75 Diorite 75 Lodi Tank Cretaceous-Jurassic 75 Metadiorite 75 Lodi Valley Cretaceous 75 Granodiorite 85 Lone Tree Hill 8 35-39 "8, 163" 37 Granodiorite 8 Long Canyon Copper Mountains 16 Cretaceous 16 Granite 16 Long Canyon Ruby Jurassic 20 Granite 20 Long Valley Wash Cretaceous 20 Quartz monzodiorite 198 Luning Jurassic 167 Diorite 167 Majuba Canyon Miocene-Oligocene 116 Rhyolite 116 Majuba Mountain 24-25 "125, 180" 24 Rhyolite 116 Marble Canyon Miocene-Oligocene 84 Granodiorite 84 Mason Creek 40 145 40 Granite "24, 145" Mattier Creek Tertiary 51 Intrusive rock 51 Maverick Springs Tertiary 51 Dacite 198 McCarty Spring Triassic-Permian 119 Leucogranite 119 McCoy 106 157 181 157 Granodiorite-monzogranite 106 McCutcheon Creek Cretaceous 20 Granite 38 McDonald Creek 20 91 127 91 Granodiorite 20 McGary Canyon Cretaceous 75 Diorite 75 Meadow Springs 185 105 185 105 Granodiorite 92 Melrose 37 137-156 "139, 159" 156 Monzogranite 37 Mill Canyon 105 151-158 "122, 135, 140, 175" 158 Quartz monzonite 105 Millet north 79 Cretaceous 70 Monzogranite 79 Millet south 79 Cretaceous 70 Quartz diorite 79 Mineral Point 50 94 128 94 Quartz porphyry 50 Miners Spring 34 155-165 34 160 Granite 34 Mizpah Cretaceous 20 Granite 20 Monte Cristo east 56 73-140 129 96 Monzogranite 56 Monte Cristo west 86 Cretaceous-Jurassic 86 Quartz monzodiorite 86 Morrison Canyon 30-55 34 39 Granodiorite 34 Mount Neva 10 39 10 39 Granodiorite 10 Mountain City 15 93 127 93 Granite 15 Mud Spring Jurassic 115 Rhyolite 113 Muncy Creek Tertiary 51 Intrusive rock 51 Nannies Peak 120 12-39 "126, 145, 176" 39 Granite "24, 145" National 3 18 147 18 Rhyolite 3 Navajo Peak 1 Jurassic 1 Monzogabbro 1 Needle Peak Jurassic 115 Granodiorite 115 Nevada Hills 20 96 20 Dacite 96 Nevada Rand 89 Miocene 89 Diorite 89 Nevada Scheelite 87 90 177 90 Granodiorite-quartz monzodiorite 87 New York Canyon 185 59 185 59 Monzogranite 98 Ninemile Mountain Jurassic 20 Granodiorite 198 North Alligator Ridge Tertiary 51 Granitic rock 51 North Big Six 195 Jurassic "175, 195" Granodiorite 40 Northumberland 72 158 181 158 Granodiorite 72 Old Mans 66 26-155 "66, 140, 152, 190" 155 Diorite-granite 66 Olsen 132 68-93 "149, 188" 91 Granodiorite 132 Ophir 55-89 "82, 141" 89 Granodiorite 141 Ophir Creek Cretaceous 70 Granitic rock 70 Ophir Summit Cretaceous 70 Diorite 70 Orizaba Cretaceous 70 Granodiorite-quartz diorite 70 Osgood 4 75-95 "136, 181, 182" 95 Granodiorite 4 Panther Canyon Jurassic 115 Granodiorite 115 Parrot Peak 1 173 1 173 Diorite 1 Pearl Creek 39 36 39 36 Monzogranite 39 Pipe Spring 78 80 141 80 Monzogranite 74 Pirouette Mountain Miocene-Oligocene 93 Rhyolite 93 Pleasant Valley Tertiary 226 Rhyolite 115 Poker Brown Cretaceous 115 Granodiorite 115 Pole Canyon-Can Young Canyon 23 23-88 "152, 190" 79 Monzogranite 53 Poormans Gulch 38 163 38 Leucogranite 8 Porcupine Creek Tertiary-Cretaceous 9 Granodiorite 9 Puma Hill 55 110 168 110 Dacite 55 Pumpernickel Cretaceous-Jurassic "5, 12" Quartz diorite "5, 12" Railroad Bullion 20 36-37 "139, 140, 158" 37 Granodiorite 27 Railroad Currant 71 33-46 "139, 140" 33 Granite 198 Ravenswood 181 73 181 73 Quartz monzonite-monzogranite 109 Ravenswood Peak Tertiary-Jurassic 109 Quartz monzodiorite 198 Rawhide 89 Miocene 89 Rhyolite 89 Red Butte Tertiary-Jurassic 109 Granodiorite 198 Rhyolite Pass 19 192 19 Rhyolite 192 Richmond 41 106-112 "125, 129, 167, 175" 112 Granite 41 Robinson 105-123 "122, 160, 161, 177" 111 Monzonite-quartz monzonite 61 Robinson Pinon Tertiary 28 Rhyolite 28 Rock Creek Miocene 109 Rhyolite 81 Rock Creek Canyon Tertiary 92 Granite-granodiorite 92 Rockhill Canyon 130 168 130 168 Quartz diorite 112 Rocky Canyon Humboldt 186 71-84 "115, 130, 158, 186" 72 Granodiorite-monzogranite 119 Rocky Canyon Jackson Tertiary-Cretaceous 9 Granodiorite 9 Rose Creek 130 93 130 93 Granite 130 Rosebush Creek Tertiary-Jurassic 48 Granitic rock 48 Round Mountain 78 79-92 "73, 141, 149" 90 Monzogranite 73 Ruby Hill 46 70-106 "128, 140, 156, 168, 175" 106 Quartz diorite 46 Ruby Valley Cretaceous 20 Granite 20 Ruby Wash Cretaceous 20 Rhyolite 198 Rye Patch 68-93 "149, 188" 91 Granodiorite 132 Sand Springs 88 78-82 "177, 186" 80 Monzogranite-granodiorite 100 Santa Rosa 194 100-102 184 102 Granodiorite 9 Sawtooth 194 Tertiary-Cretaceous 9 Granodiorite 9 Say Canyon Triassic 114 Rhyolite 115 Schell Creek Range Tertiary 51 Intrusive rock 51 Seligman 56 105 138 105 Granodiorite 56 Seventy Six Creek Jurassic 18 Granite 198 Seyler Peak Tertiary-Cretaceous 70 Granitic rock 70 Sheep Head Canyon Jurassic 91 Diorite 91 Silver Creek Cretaceous 12 Granite 12 Silver Creek Snake Range 66 26-155 "66, 140, 152, 190" 155 Granite 66 Silver Spring 71 33-46 "139, 140" 33 Quartz monzonite 71 Silver Zone Pass 29 127-157 "122, 160, 175" 157 Granodiorite "20, 29" Skull Canyon Cretaceous 92 Monzogranite-granodiorite 97 Skull Creek 11 83 127 83 Granite 11 Slate Mountain 81-82 183 81 Granodiorite 96 Slumbering Hills 184 Tertiary-Cretaceous 9 Granodiorite 184 Smelser Pass Jurassic 115 Granodiorite 115 Smith Creek Ruby Tertiary 20 Quartz monzonite 38 Smith Creek Snake 82 127 82 Pegmatite and aplite 65 Smith Creek Valley Miocene 109 Basalt-dacite-diorite 81 Snake Creek-Williams Canyon 23 43-161 "122, 139, 152, 153, 154, 155, 157, 190" 155 Tonalite-monzogranite 53 Soda Spring Valley Jurassic 86 Granodiorite 86 South of Paradise Peak 75 Cretaceous 75 Granite 75 South Spring Canyon Tertiary 36 Granodiorite 36 South Twin River Tertiary-Cretaceous 70 Intrusive rock 70 Spaulding Canyon Jurassic 112 Quartz monzonite 112 Spencer Hot Springs 69 164 69 164 Monzogranite 69 Spring Gulch 30 Tertiary 30 Rhyolite 30 Spring Valley Tertiary-Jurassic 119 Granodiorite-monzogranite 119 Springer 132 68-93 "149, 188" 91 Granodiorite 132 Steptoe Warm Springs 59 25-37 "138, 151" 37 Monzogranite 59 Stillwater Triassic 115 Leucogranite 115 Stonehouse 194 Tertiary-Cretaceous 9 Granodiorite 9 Stony Basin central Cretaceous 7 106 Granodiorite 7 Stony Basin north 105 7 105 Granodiorite 7 Stony Basin south 106 181 106 Granodiorite 181 Straight Canyon Tertiary-Jurassic 110 Diorite 110 Strawberry Creek 150 51-160 "122, 127, 138, 152" 160 Monzogranite 67 Summit Creek 11 Cretaceous 11 Granodiorite 198 Suzie Creek Tertiary 20 Rhyolite 26 Swales Mountain 25 39-40 "25, 142" 40 Monzonite-rhyolite 25 Table Mountain Cretaceous 111 Diabase 111 Tenabo 38 "164, 181" 38 Granodiorite-quartz diorite 45 Thomas Creek Tertiary 7 Quartz latite 7 Tippett Springs Tertiary 51 Rhyolite 178 Tipton Ranch 146-161 "125, 131, 181" 155 Monzonite 121 Toano Springs 29 63-77 "150, 166" 77 Monzogranite 29 Tobin 181 157 181 157 Granodiorite 181 Todd Mountain 101 84 133 84 Monzogranite-granodiorite 101 Toyn Creek 39 36 39 36 Granodiorite 39 Trail Creek 12 Cretaceous 12 Granodiorite 12 Trenton Canyon 8 89 181 89 Granodiorite-monzogranite 8 Trident Peak Tertiary-Cretaceous 9 Granodiorite 9 Trinity Canyon Cretaceous 115 Granodiorite 115 Trinity Range 184 92-96 184 94 Granodiorite 184 Trout Creek 1 Cretaceous-Jurassic 1 Tonalite 1 Trout Creek Spur 1 162 1 162 Monzodiorite 1 Tungsten Mountain Cretaceous 92 Granodiorite 92 Tungstonia 60 24-75 "60, 124, 139, 151" 70 Monzogranite-granodiorite 60 Twin Buttes 40 189 40 Granodiorite 198 Upper stock 87 90 177 90 Granodiorite 87 Valley of the Moon Tertiary-Jurassic 107 Granitic rock 107 Vindicator 80 Cretaceous 70 Granitic rock 70 Wall Canyon Tertiary-Cretaceous 70 Intrusive rock 70 Walti Ranch 34 181 34 Granodiorite 104 Ward 62 35 165 35 Monzogranite-quartz monzonite 62 Welches Canyon 41 37-93 "129, 174" 38 Granodiorite 41 West Buttes north Jurassic 20 Granodiorite 198 West Buttes south 157 122 157 Granodiorite-monzogranite 198 West Humboldt 184 106 184 106 Leucogranodiorite 184 Whistler Mountain 46 87-183 "129, 140, 175" 160 Monzogranite (aplitic) 46 White Cloud Canyon 183 30 183 30 Granite 183 White Elephant Butte 19 100 20 100 Granodiorite 19 White Rock 12 Cretaceous 12 Quartz diorite 198 Whitehorse "31, 33" 157-162 "140, 159" 160 Monzogranite-granodiorite "31, 33" Wildhorse Tertiary 20 Granite 20 Willow Corral 150 44 150 Granodiorite-dacite 44 Willow Creek Desatoya Tertiary 92 Dacite 92 Willow Creek Humboldt Triassic-Permian 98 Rhyolite 98 Willow Patch Spring Tertiary 67 Dacite 67 Winnemucca Tertiary 9 Rhyolite-dacite 9 Winnemucca Mountain Cretaceous-Jurassic 9 Diorite 9 Winter Creek Cretaceous 11 Granite 11 Wood Cone Peak 46 34 "125, 156" 34 Granodiorite 46 Woody Canyon 132 68-93 "149, 188" 91 Granodiorite 132 Woody Springs 68-93 "149, 188" 91 Granodiorite 132