Tmi
Sopris pluton
TmiA
34 Ma granodiorite pluton-minlz and veins near contacts Stage A
Day and others, unpub. data; 1:250,000
TmiB
29 Ma granodiorite to monzonite porph., unminlzd, most laccoliths
Snowmass pluton
Twf
Twfm
38.8 Ma Winfield felsic stocks; assoc. with Mo minlz.
Fridrich and others, 1998; 1:50,000
Tiy
Tiyg
35 Ma resurgent intrusion Grizzly Pk caldera
Tt
Twin Lakes Pluton
39-60 Ma Twin Lakes granite-granodiorite pluton
Whiterock pluton
Ragged Mountain laccolith
29 Ma granodiorite to monzonite porph. unminlzd, most laccoliths
Rasberry Creek laccolith
Tgt
Tbgt
Treasure Mt. granite 12 Ma
Mutschler, 1970; 1:24,000
White rock pluton
Tiyp
33 Ma post resurgent intrusion Grizzly Peak caldera
Tipy
Trh?
Tqm
27 Ma Mt Belleview granodiorite stock, Mo-porph alt. and minlz.
Tqmp
Tp
~31 Ma granodiorite to qtz monz. porph.; generally unaltered
Ant Creek Sill
Tf
Paradise Peak stock; Mo-prospect
TmiD
29 Ma andesite to granodiorite stocks, signif. assoc. minlz, contact met. aureo
Ant Creek sill
Tbrh
18.3 Ma hi-silica bimodal rhyolite plug; Amax Mo target
Gaskill and others, 1991; 1:24:000
Gaskill and Godwin, 1966; 1:24,000
Gothic Mountain laccolith
Copper Creek sill
Elkton sill
~29 Ma andesite to granodiorite stocks, signif. assoc. minlz, contact met. aureo
Gaskill and others, 1967; 1:24,000
Marcellina Mountain laccolith
Italian Mountain intrusive complex
Tiu
unknown
Snodgrass laccolith
Ruby Anthracite Canyon laccolith
Crested Butte laccolith
Tmib
TmiDd
dacite to granodiorite dikes, signif. assoc. minlz, assoc. with stocks
Trh
Redwell basin rhyolite-breccia
18 Ma high-silica rhyolite intrusion and dike; Climax-type
Redwell basin breccia
~29 Ma andesite to granodiorite dikes, signif. assoc. minlz, assoc. with stocks
Mount Axtell laccolith
Mt. Princeton batholith
TmiP
32-39 Ma Mt. Princeton batholith and related; rhyolite and qtz monz. to granite
Tki
69 Ma latite sills stocks, unmineralized
Cumberland Pass stock sills
Tbr
Ter
Oligocene rhyolite porphyry
Whetstone laccolith
Anthracite Range laccolith
Mount Carbon laccolith
Round Mountain stock
11.7 Ma rhyolite stock, unaltered and unmineralized
Tehr_m
Term
34 Ma rhyolite minlzed
Dewitt and others, 1999; 1:50,000
Tr
Sheep Mountain mineralized area
<18 Ma bimodal suite high-silica? rhyolite intrusions
Ellis and others, 1987; 1:100,000
Tgm
34 ma mo rich granodiorite
34 Ma Mo-rich granodiorite
West Elk volcanic center; andesite
Teqm
~29 Ma andesite to mafic andesite stock, hyd. altered, minor mineralization
Fossil ridge latite sills
69 Ma Fossil Ridge latite sills; unmineralized
Tmii
Fossil Ridge latite sills
Tmip
Tomichi Dome fine-grained granite
Miocene Tomichi rhyolite to grainite dome
Porphyry Creek stock
Tir
Oligocene unmineralized rhyolite intrusion
Olson, 1974; 1:24,000
0
Tem
30-35 Ma qtz monzonite to monzonite volcanic center
Lipman, 1976; 1:48,000
Tea
30-36 Ma andesite to dacite
30-36 Ma rhyolitic domal intrusion
Larson Creek center
30-36 Ma monzonite  early volcanic center
Tbdr
18 Ma rholite domes bimodals suite
30-35 Ma qtz monzonite volcanic center
Luedke, 1972; 1:24,000
Tmp
26 Ma qtz monzonite to monzonite stocks, plugs, plutons
Tibrh
18-19 Ma bimodal rhyolite domes; minor alteration, U-minlz.
Sugarloaf rock, fresh intrusion
26-27 Ma dacite unaltered Sugarloaf rock
Tegd
Sneffels stock spans 32-26 Ma granodiorite to granite; part may be a young as 26
Tirh
Tlrh
22.9 Ma rhyolite intrusions and dikes, alkaline Lake City caldera
Capital City intrusions
26 Ma monzonite to quartz monzonite porphyry intrusions; altered mineralized
26-27 Ma unaltered dacite
26-27 Ma unaltered qtz monzonite
Tisy
Tlsy
22.9 Ma resurgent syenite intrusions, alkaline Lake City caldera
Hon, 1987; 1:24,000
Tirp
Ti
Tiys
~26 Ma San Luis caldera, resurgent granite and closely pre-and post dacites
Lipman and Sawyer, 1988; 1:24,000
Tsid
Tiqm
Alpine Gulch complex
Tdp
23 Ma calc-alkaline dacite porphyry intrusions; acid-sulfate and porph. altera
Capital City
Sneffels stock
Burbank and Luedke, 1966; 1:24,000
Tbrhd
<18 Ma rhyolite dike
Yager and others, unpub. data: 1:48,000 digital map
26-27 Ma qtz monzonite equiv. to Sultan Mtn stock
Tedg
23 Ma dacite porphyry intrusions
Slumgullion Pass rhyolite
25-27 Ma rhyolite intrusion; highly altered =Golden wonder age
bimodal high-silica rhyolite intrusions <18 Ma
10-18 Ma bimodal mostly high-silica rhyolite
Tidp
Red Mountain
Tmid
Tm
~26-28 Ma fresh monzonite to monzonite porh. domal intrusions
23 Ma dacite porphyry intrusion
Cuba Gulch rhyolite
16 Ma high-silica Climax-type rhyolite dikes; mineralized
Horshoe Bend stock; Mo-target
16-17 Ma Horshoe bend rhyolite stock; Mo-target
26.5-25 Ma quartz monz. granite Sultan Mountain stock
Wilson Peak stock and other sills and plutons
Wison Peak stock
Wilson Peak stock
Carson Center stock
29 Ma qtz monzonite to monzonite volcanic center
Lipman, 1976; 1:48:000
Ophir stock
Trd
25-27 Ma dacite of Rambouliet Park intrusive neck
Tmp?
Early? monzonite porph. volcanic center
intrusion undifferentiated
Porphyro-aphanitic stock; unaltered