The rock

What the geologic map says is under each crag's point: 180 map units across 2,246 of 2,256 crags. A climber says granite or sandstone; the map says which granite, and how old.

Read at each crag's map point from the most detailed sheet Macrostrat serves there (1:100,000 along the Front Range, 1:500,000 elsewhere). A point can be a few hundred metres from the rock and a contact line is 100 to 500 m wide on the ground, so a wall can be the neighbouring unit; each crag page says which sheet answered.

• Rocks of Pikes Peak Batholith (1000-m.y. age group) · 220 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old · Pikes Peak Granite, Mount Rosa Granite, Windy Point Granite, Redskin Granite

• Granitic rocks of 1700-m.y. age group · 150 crags

  Granite · Paleoproterozoic, about 2,500 to 1,600 million years old · Boulder Creek Granite, Cross Creek Granite, Denny Creek Granodiorite, Kroenke Granodiorite, Browns Pass Quartz Monzonite, Powderhorn Granite, Pitts Meadow Granodiorite, Bakers Bridge Granite, Tenmile Granite

• Granitic rocks of 1400-m.y. age group · 143 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old · Silver Plume Granite, Sherman Granite, Cripple Creek Granite, St. Kevin Granite, Vernal Mesa Granite, Curecanti Granite, Eolus Granite, Trimble Granite

• Silver Plume Granite · 94 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Fountain Formation · 90 crags

  Sandstone · Paleozoic, about 323 to 273 million years old

• Biotitic gneiss, schist, and migmatite · 85 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Boulder Creek Granodiorite · 67 crags

  Granite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Dakota Sandstone and Burro Canyon Fm · 51 crags

  Sandstone · Cretaceous, about 129 to 95 million years old · Dakota Sandstone, Burro Canyon Formation

• Dakota Group · 49 crags

  Albian, about 145 to 97 million years old

• Pikes Peak Granite · 42 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Elephant Rock Granite · 41 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Felsic gneiss · 41 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Felsic and hornblendic gneisses, either separate or interlayered · 37 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Quartz-feldspar gneiss · 37 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Biotite gneiss · 35 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Glacial drift · 35 crags

  Pleistocene, younger than 781,000 years

• Leadville Limestone, Williams Canyon Limestone , Manitou Limestone, and Sawatch Quartzite · 35 crags

  Gneiss, schist & quartzite · Paleozoic, about 508 to 337 million years old · Leadville Limestone, Williams Canyon Limestone , Manitou Limestone, Sawatch Quartzite

• Mancos Shale · 35 crags

  Late Cretaceous, about 95 to 75 million years old

• Ash-flow tuff of main volcanic sequence · 32 crags

  Basalt & volcanic · Cenozoic, about 34 to 23 million years old

• Biotite schist · 32 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Morrison, Wanakah, and Entrada Fms · 32 crags

  Jurassic, about 164 to 145 million years old · Morrison Formation, Wanakah Formation, Entrada Sandstone

• Modern alluvium · 30 crags

  Cenozoic, up to about 2.6 million years old

• Gravels and alluviums · 29 crags

  Pleistocene, younger than 781,000 years

• Leadville Limestone, Gilman Sandstone, Dyer Dolomite, and Parting Fm · 26 crags

  Sandstone · Paleozoic, about 383 to 357 million years old · Leadville Limestone, Gilman Sandstone, Dyer Dolomite, Parting Formation

• Mesozoic and Paleozoic rocks · 23 crags

  about 541 to 66 million years old

• Pre-ash-flow andesitic lavas, breccias, tuffs, and conglomerates · 23 crags

  Sandstone · Paleogene, about 38 to 28 million years old

• Quartz-feldspar gneiss and horneblende gneiss · 21 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Till of Pinedale age · 21 crags

  Late Pleistocene, younger than 126,000 years

• Porphyroblastic Biotite Schist · 20 crags

  Gneiss, schist & quartzite · about 4,000 to 541 million years old

• Dakota Sandstone and Burro Canyon Formation · 17 crags

  Sandstone · Early Cretaceous, about 125 to 100 million years old · Dakota Sandstone, Burro Canyon Formation

• Granodiorite of Mount Evans batholith · 17 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Shoshonite · 17 crags

  Paleocene, about 66 to 62 million years old

• Silver Plume Quartz Monzonite · 17 crags

  Granite · Mesoproterozoic, about 4,000 to 541 million years old

• Laramide intrusive rocks · 16 crags

  Phanerozoic, about 72 to 38 million years old

• Rhyodacite And Basalt · 15 crags

  Basalt & volcanic · Paleocene, about 66 to 56 million years old

• Belden Fm · 14 crags

  Pennsylvanian, about 323 to 308 million years old · Belden Formation, Kerber Formation

• Gneiss · 14 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Tonalite, Metasedimentary Rocks · 14 crags

  about 4,000 to 541 million years old

• Brushy Basin Shale Member of the Morrison Formation · 13 crags

  Late Jurassic, about 153 to 145 million years old · Brushy Basin Shale Member

• One or more Ordovician fms · 12 crags

  Ordovician, about 483 to 451 million years old · Fremont Limestone, Harding Sandstone, Manitou Limestone

• Uncompahgre Fm · 12 crags

  Statherian, about 1,660 to 1,610 million years old · Uncompahgre Formation

• Windblown sand · 12 crags

  Quaternary, younger than 126,000 years

• Landslide Deposits · 11 crags

  Cenozoic, up to about 2.6 million years old

• Morrison, Canyon Springs Member Of Sundance And Jelm Formations · 11 crags

  Mesozoic, about 222 to 150 million years old · Morrison Formation, Canyon Springs Member, Jelm Formation

• Complex of gneisses and schists · 10 crags

  Gneiss, schist & quartzite · Proterozoic, about 2,500 to 1,000 million years old

• Fan deposits · 10 crags

  Quaternary, younger than 126,000 years

• Rico and Hermosa Fms · 10 crags

  Pennsylvanian, about 314 to 299 million years old · Rico Formation, Hermosa Formation

• Wingate Sandstone and Chinle Fm · 10 crags

  Sandstone · Late Triassic, about 237 to 200 million years old · Wingate Sandstone, Chinle Formation

• Cutler Fm · 9 crags

  Permian, about 299 to 269 million years old · Cutler Formation

• Hermosa Fm · 9 crags

  Pennsylvanian, about 314 to 304 million years old · Hermosa Formation

• Morrison Fm and Entrada Sandstone · 9 crags

  Sandstone · Jurassic, about 164 to 145 million years old · Morrison Formation, Entrada Sandstone

• Morrison Fm, Summerville Fm, and Entrada Sandstone · 9 crags

  Sandstone · Jurassic, about 165 to 145 million years old · Morrison Formation, Summerville Formation, Entrada Sandstone

• Older glacial drift · 9 crags

  Pleistocene, about 1.8 to 0.1 million years old

• Rocks of Montezuma stock and vicinity, Monzogranite porphyry · 9 crags

  Granite · Eocene, about 56 to 34 million years old

• Colluvium · 8 crags

  Cenozoic, up to about 2.6 million years old

• Maroon Fm · 8 crags

  Paleozoic, about 323 to 270 million years old · Maroon Formation

• Minturn Fm in west-central and south-central and other units · 8 crags

  Pennsylvanian, about 312 to 306 million years old · Minturn Formation

• Quartzofeldspathic Schist And Gneiss Interbedded With Mica Schist And Gneiss · 8 crags

  Gneiss, schist & quartzite · about 4,000 to 541 million years old

• Eagle Valley Fm · 7 crags

  Pennsylvanian, about 308 to 306 million years old · Eagle Valley Formation

• Langhoff Gulch Granite · 7 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Leadville, Gilman, Dyer, Parting, and Sawatch Fms in west-central and south-central. Leadville Limestone, Ouray Limestone, Elbert Fm, and Ignacio Quartzite in far southwest · 7 crags

  Gneiss, schist & quartzite · Paleozoic, about 501 to 359 million years old · Leadville Formation, Gilman Formation, Dyer Formation, Parting Formation, Sawatch Formation, Ouray Limestone, Elbert Formation, Ignacio Quartzite

• Middle Tertiary intrusive rocks · 7 crags

  Cenozoic, about 56 to 5.3 million years old

• Quartzite, conglomerate, and interlayered mica schist · 7 crags

  Sandstone · Paleoproterozoic, about 2,500 to 1,600 million years old

• Quartzofeldspathic mica schist · 7 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Talus deposits · 7 crags

  Quaternary, younger than 781,000 years

• Chinle Formation · 6 crags

  Late Triassic, about 232 to 207 million years old

• Dawson Formation and Arapahoe Formation · 6 crags

  Maastrichtian, about 69 to 65 million years old · Dawson Formation, Arapahoe Formation

• Fine-grained porphyritic phase · 6 crags

  Mesoproterozoic, about 1,600 to 1,000 million years old

• Glen Canyon Group and Chinle Fm · 6 crags

  Late Triassic, about 237 to 207 million years old · Glen Canyon Group, Chinle Formation

• Intra-ash flow andesitic lavas · 6 crags

  Cenozoic, about 34 to 23 million years old

• Wingate Sandstone · 6 crags

  Sandstone · Mesozoic, about 207 to 200 million years old

• Young stream-channel and overbank alluvium · 6 crags

  Holocene, younger than 12,000 years

• Alluvium · 5 crags

  Cenozoic, up to about 2.6 million years old

• Eocene prevolcanic sedimentary rocks · 5 crags

  Basalt & volcanic · Paleogene, about 57 to 46 million years old · Echo Park Alluvium, Telluride Conglomerate, Blanco Basin Formation

• Hornblende-plagioclase gneiss and amphibolite · 5 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Kayenta Formation · 5 crags

  Early Jurassic, about 200 to 189 million years old

• Laramie Fm and Fox Hills Sandstone · 5 crags

  Sandstone · Late Cretaceous, about 76 to 68 million years old · Laramie Formation, Fox Hills Sandstone

• Lyons Sandstone · 5 crags

  Sandstone · Permian, about 282 to 273 million years old

• Piney Creek Alluvium · 5 crags

  Holocene, younger than 12,000 years

• Post-Piney Creek Alluvium · 5 crags

  Holocene, younger than 12,000 years

• Till of Bull Lake age · 5 crags

  Late Pleistocene, younger than 126,000 years

• Wasatch Fm (including Fort Union equivalent at base) and Ohio Creek Fm · 5 crags

  Paleogene, about 66 to 54 million years old · Wasatch Formation, Ohio Creek Formation

• Broadway Alluvium · 4 crags

  Cenozoic, about 2.6 to 0.0 million years old

• Eolian deposits · 4 crags

  Cenozoic, up to about 2.6 million years old

• Fountain Fm · 4 crags

  Paleozoic, about 320 to 295 million years old · Fountain Formation

• Hornfels · 4 crags

  Late Cretaceous, about 100 to 66 million years old

• Knotted Mica Schist · 4 crags

  Gneiss, schist & quartzite · Paleoproterozoic, about 4,000 to 541 million years old

• Mesaverde Fm, undivided · 4 crags

  Late Cretaceous, about 91 to 87 million years old · Mesaverde Formation

• Open Water · 4 crags

• Pierre Shale, undivided · 4 crags

  Late Cretaceous, about 86 to 75 million years old · Pierre Shale

• Salt Wash Sandstone Member of the Morrison Formation · 4 crags

  Sandstone · Late Jurassic, about 157 to 155 million years old · Salt Wash Sandstone Member

• Slocum Alluvium · 4 crags

  Cenozoic, about 2.6 to 0.0 million years old

• State Bridge Fm · 4 crags

  Phanerozoic, about 269 to 247 million years old · State Bridge Formation

• Upper part of Dawson Arkose · 4 crags

  Sandstone · Paleocene, about 66 to 57 million years old · Dawson Arkose

• Chinle And State Bridge Fms · 3 crags

  Late Triassic, about 269 to 207 million years old · Chinle Formation, State Bridge Formation

• Coalmont Fm · 3 crags

  Paleogene, about 66 to 34 million years old · Coalmont Formation

• Dakota Sandstone and Purgatoire Fm · 3 crags

  Sandstone · Albian, about 145 to 97 million years old · Dakota Sandstone, Purgatoire Formation

• Dakota and Morrison Fms · 3 crags

  Mesozoic, about 164 to 91 million years old · Dakota Formation, Morrison Formation

• Dolores Fm · 3 crags

  Late Triassic, about 230 to 222 million years old · Dolores Formation

• Granitic rocks of 1400- and 1700-m.y. age groups, undivided, or, in Taylor River region, rocks with characteristics of Xg but U-Th-Pb zircon ages of Yg · 3 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Granodiorite and monzogranite · 3 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Hunter Canyon Formation of the Mesaverde Group · 3 crags

  Late Cretaceous, about 86 to 66 million years old · Hunter Canyon Formation

• Mesozoic rocks · 3 crags

  Mesozoic, about 252 to 66 million years old

• Morrison, Ralston Creek, and Entrada (or Exeter) Fms · 3 crags

  Jurassic, about 164 to 145 million years old · Morrison Formation, Ralston Creek Formation, Entrada Sandstone

• Pegmatite · 3 crags

  Granite · Proterozoic, about 2,500 to 1,000 million years old

• Post-Piney Creek and Piney Creek Alluvium · 3 crags

  Holocene, younger than 12,000 years

• St. Kevin Granite · 3 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old · St Kevin Granite

• Twin Lakes granodiorite · 3 crags

  Granite · Paleocene, about 66 to 56 million years old

• Valley-floor alluvium · 3 crags

  Holocene, younger than 126,000 years

• Young stream-terrace alluvium · 3 crags

  Late Pleistocene, younger than 126,000 years

• Browns Park Fm · 2 crags

  Miocene, about 23 to 7.2 million years old · Browns Park Formation

• Castle Rock Conglomerate · 2 crags

  Sandstone · Rupelian, about 30 to 29 million years old

• Denver Fm or lower part of Dawson Arkose · 2 crags

  Sandstone · Phanerozoic, about 67 to 57 million years old · Denver Formation, Dawson Arkose

• Dolores Fm and Cutler Fm · 2 crags

  Phanerozoic, about 299 to 222 million years old · Dolores Formation, Cutler Formation

• Granite of Hagues Peak · 2 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Granite of Log Cabin batholith, undivided · 2 crags

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Granitic rock of Mount Princeton batholith, equigranular biotite-hornblende monzogranite interior facies · 2 crags

  Granite · Eocene, about 38 to 34 million years old

• Henry Mountain? Granite · 2 crags

  Granite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Kayenta Fm, Wingate Sandstone, and Chinle Fm · 2 crags

  Sandstone · Mesozoic, about 237 to 189 million years old · Kayenta Formation, Wingate Sandstone, Chinle Formation

• Laramie Formation · 2 crags

  Maastrichtian, about 72 to 69 million years old

• Louviers Alluvium · 2 crags

  Cenozoic, about 2.6 to 0.0 million years old

• Mafic rocks of 1700-m.y. age group · 2 crags

  Paleoproterozoic, about 2,500 to 1,600 million years old

• Minturn and Belden Fms · 2 crags

  Pennsylvanian, about 319 to 306 million years old · Minturn Formation, Belden Formation

• Moenkopi Fm and Cutler Fm · 2 crags

  Triassic, about 252 to 243 million years old · Moenkopi Formation, Cutler Formation

• Morrison Fm · 2 crags

  Late Jurassic, about 157 to 145 million years old · Morrison Formation

• Mount Garfield Formation and Sego Sandstone of the Mesaverde Group · 2 crags

  Sandstone · Late Cretaceous, about 75 to 66 million years old · Mount Garfield Formation, Sego Sandstone

• Mountain valley alluvium · 2 crags

  Quaternary, younger than 126,000 years

• Pierre Shale (Kp), Niobrara (Kn), and Carlile, Greenhorn, and Graneros (Kcg) Fms, undivided · 2 crags

  Late Cretaceous, about 97 to 84 million years old · Pierre Shale, Niobrara Formation, Carlile Formation, Greenhorn Formation, Graneros Shale

• Post-Piney Creek alluvium and Piney Creek Alluvium, undivided · 2 crags

  Holocene, younger than 12,000 years

• Rocks of Montezuma stock and vicinity, older felsic to intermediate porphyries of alkali-calcic group · 2 crags

  Phanerozoic, about 100 to 56 million years old

• Sangre de Cristo Fm · 2 crags

  Paleozoic, about 310 to 280 million years old · Sangre de Cristo Formation

• Till of Pinedale glaciation · 2 crags

  Late Pleistocene, younger than 126,000 years

• Twin Spruce Monzogranite · 2 crags

  Granite · Proterozoic, about 2,500 to 1,000 million years old

• Uinta Mountain Group · 2 crags

  Mesoproterozoic, about 1,600 to 1,000 million years old

• Weber Sandstone and Maroon Fm · 2 crags

  Sandstone · Paleozoic, about 306 to 270 million years old · Weber Sandstone, Maroon Formation

• Amphibolite and quartzite · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Amphibolite, hornblendite, and related rocks · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Animas Fm · 1 crag

  Phanerozoic, about 68 to 57 million years old · Animas Formation

• Basalt · 1 crag

  Basalt & volcanic · Cenozoic, about 66 to 2.6 million years old

• Basalt flows and associated tuff, breccia, and conglomerate of late-volcanic bimodal suite · 1 crag

  Sandstone · Zanclean, about 5.3 to 3.6 million years old · Hinsdale Formation, Servilleta Formation

• Biotite gneiss and schist with garnet · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Biotite granite · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Biotite schist and gneiss · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Brecciated Rock · 1 crag

• Dakota Sandstone · 1 crag

  Sandstone · Cretaceous, about 113 to 95 million years old

• Dakota Sandstone or Group · 1 crag

  Sandstone · Early Cretaceous, about 122 to 100 million years old · Dakota Sandstone

• Dakota, Purgatoire, Morrison, Ralston Creek, and Entrada Fms in southeast. Dakota, Morrison, and Entrada Fms in central mountains. Dakota, Burro Canyon, Morrison, Wanakah, and Entrada Fms in Gunnison River area. Dakota, Morrison, Curtis, And Entrada F · 1 crag

  Mesozoic, about 166 to 100 million years old · Dakota Formation, Purgatoire Formation, Morrison Formation, Ralston Creek Formation, Entrada Sandstone, Burro Canyon Formation, Wanakah Formation, Curtis Formation

• Dry Union Formation · 1 crag

  Zanclean, about 5.3 to 5.3 million years old

• Equigranular biotite granite · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Frontier Sandstone and Mowry Shale Members of Mancos Shale, and Dakota Sandstone · 1 crag

  Sandstone · Early Cretaceous, about 122 to 100 million years old · Frontier Sandstone Member, Mowry Shale Member, Dakota Sandstone

• Granite of Rosalie Peak · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Granodiorite and monzogranite of unknown age · 1 crag

  Granite · Proterozoic, about 2,500 to 1,000 million years old

• Granodiorite of Mount Harvard · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Gravelly stream alluvium · 1 crag

  Pleistocene, younger than 781,000 years

• Green River Fm--Lower Part · 1 crag

  Eocene, about 54 to 35 million years old · Green River Formation

• Intrusive rocks, undivided · 1 crag

  Cenozoic, about 66 to 2.6 million years old

• Kirtland Shale and Fruitland Fm · 1 crag

  Late Cretaceous, about 84 to 68 million years old · Kirtland Shale, Fruitland Formation

• Lance Fm · 1 crag

  Maastrichtian, about 72 to 66 million years old · Lance Formation

• Leadville Limestone, Williams Canyon Limestone, and one or more of: Fremont Limestone, Harding Sandstone, and Manitou Limestone · 1 crag

  Sandstone · Paleozoic, about 485 to 341 million years old · Leadville Limestone, Williams Canyon Limestone, Fremont Limestone, Harding Sandstone, Manitou Limestone

• Loess · 1 crag

  Late Pleistocene, younger than 126,000 years

• Madison Limestone and Lodore Fm · 1 crag

  Limestone · Paleozoic, about 359 to 335 million years old · Madison Limestone, Lodore Formation

• Manitou Limestone and Sawatch Quartzite in Southern Front Range and Wet Mountains. One or more Ordovician Fms (Fremont Limestone, Harding Sandstone, and Manitou Dolomite), Dotsero Fm, Peerless Fm, and Sawatch Quartzite in west-central and south-central · 1 crag

  Gneiss, schist & quartzite · Paleozoic, about 500 to 445 million years old · Manitou Limestone, Sawatch Quartzite, Fremont Limestone, Harding Sandstone, Manitou Dolomite, Dotsero Formation, Peerless Formation, Sawatch Quartzite

• Mass-movement and glacial deposits, undivided · 1 crag

  Quaternary, younger than 126,000 years

• Menefee Fm and Point Lookout Sandstone · 1 crag

  Sandstone · Late Cretaceous, about 91 to 86 million years old · Menefee Formation, Point Lookout Sandstone

• Morgan Fm and Round Valley Limestone · 1 crag

  Limestone · Carboniferous, about 326 to 308 million years old · Morgan Formation, Round Valley Limestone

• Morrison Formation and Ralston Creek Formation, undivided · 1 crag

  Jurassic, about 174 to 145 million years old · Morrison Formation, Ralston Creek Formation

• Outer cap rock monzogranite of the Virginia Dale ring-dike complex · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Outwash gravel of Pinedale glaciation · 1 crag

  Late Pleistocene, younger than 126,000 years

• Peraluminous monzogranite · 1 crag

  Granite · Mesoproterozoic, about 1,600 to 1,000 million years old

• Pierre Shale, Upper Shale Member · 1 crag

  Late Cretaceous, about 84 to 75 million years old · Pierre Shale

• Porphyroblastic quartz-biotite-muscovite schist of White Ranch · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Potassic basalt (shoshonite) lava flows · 1 crag

  Basalt & volcanic · Paleocene, about 66 to 56 million years old

• Quartzite · 1 crag

  Gneiss, schist & quartzite · Paleoproterozoic, about 2,500 to 1,600 million years old

• Satanka And Ingleside Formations · 1 crag

  Permian, about 295 to 273 million years old · Satanka Formation, Ingleside Formation

• Talus · 1 crag

  Quaternary, younger than 126,000 years

• Terrace gravel · 1 crag

  Cenozoic, up to about 2.6 million years old

• Topaz rhyolite flow of Nathrop Volcanics, including basal vitrophyre · 1 crag

  Basalt & volcanic · Rupelian, about 34 to 28 million years old

• Wall Mountain Tuff · 1 crag

  Basalt & volcanic · Paleogene, about 35 to 33 million years old

• Weber Sandstone · 1 crag

  Sandstone · Pennsylvanian, about 314 to 299 million years old

• White River Fm or Group · 1 crag

  Cenozoic, about 35 to 23 million years old · White River Formation

Geology data: Macrostrat (CC BY 4.0), serving USGS and Colorado Geological Survey maps. Where a guidebook or OpenStreetMap names a crag's rock, that word keeps precedence on the crag page; this is the map's answer, stated as one.