CLUS TI TION So 
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PuateE I. General view of Aspen and vicinity___..__.----.-_-_____-.---__-__-__--------2.- 1 
TM, Wests Aisjasia Wimmer oboe eel one eee Meee Dee aes 70 
III. Red Mountain from Aspen Mountain _____._________-__--.-....._.... -..--..-.- Wis) 
IV. Faulting of Cambrian quartzite and Silurian dolomite on hill on east side of 
CoppersG ul Chis m ses amen See ene RE emer pe ne Ry kes oe a ee AE RE as 98 
VY. View across Queens Gulch to Castle Butte. _...._-..-.-...----. -----.--------.- 100 
Wiles CastlemBattemromtheteasty ass 226 a eee Nae eee eR Seeley he WES oe 2 te 102 
WARE anliinscatpronitacelois © ast] es EU tte pase een a= one eee eee nee 104 
VIII. View across Castle Creek up Ophir Gulch, showing Burro fault scarp.____.____- 106 
XAT Saray aneraulupscalpy ss, oo Aes oss en ee eh eS ee oe ene San osm owe eee ewe 108 
XGp OllVerPDelistaullinscan phen ses aoe ne ee aes eee, Se ae ne eee tee aoe 110 
XI. View from Lenado. looking east up the canyon __________-..--.------..--.------- 114 
XII. Fold in Cambrian quartzite on the north side of Lenado Canyon____.___________- 116 
XIII. Silver Creek Valley, eroded in Weber shales ______.._ -._-._-----------------.-- 118 
XIV. Maroon sandstones on north side of Woody Creek Valley___..._.-_-. ._----__-__- 120 
XGVEVAeWwao melon ter hank districts s=s2-) 2-2 sseos ose aaatents Suen So se- sees seease OS 
NG Vile Cretaceouslakeanwies iiOLehegy Ute ree aera se eee ee le nye ene ee een 3S 
Vili CastlewWreekavalleysand Eveds Mio win tation 140 
XVIII. Roaring Fork Valley at Aspen, and Aspen Mountain __-----_-.-_-----_-.--_-__-- 142 
XIX. West side of Red Butte and of Red Mountain. -._...._...../_.----------.------- 144 
KX. A. M. and 8. mine, No. 6 stope _-______.__.. eas < SHe essa saat ee sae ane es 156 
PNOXU Se AS Mire an dts nmin en G.olcondaristope sss sate ee ee ee ee ee 158 
SOM, Asfoem Mourn timoyen IRyerel Whormialipiin ooo ees ces oae sooo sose oe seb Seses + sace- 164 
XXIII. Spar Gulch from near Best Friend shaft...._.........-...-.-----.---- .-.------- 178 
ROXU NV No uT bel Otter ean key] OMe Tap OL b1 OTN ry ea ee eee ree Se Se 180 
PXOXGV Pe MOTE bOL OGLE Era: Ken Up) 1) C91) O TL O Ta ee oes ee ee epee ee rs ee ere Pp Ere 180 
XX Smug cler Mounbaimt ser se mere ere aes sabe sea Sie eee Se Selene ere 182 
ROX ADM ona Out Aes - ewe siese eee cere CN ALR aOR, SWB 3) cpa en ecard eet eet eer 198 
XEXeV A GpenkiContactwnine! Wenad ores sess ee = Meee ee ae eee ey at me) a ree 200 
DOMID (Ernlkeln eulorayes Srlkyere siti, WEIMER) = 8 ee oe pte eee Seed eo eae sSeeae 202 
XXX. Queens Gulch, from west side of Castle Creek_.._...-.__._.. ....-_----.---.----. 204 
XXXI. Stratification and joint planes in dolomite, West Aspen Mountain _-._._._._____- 216 
EXC TAS PCrOlGiOULCrOp) 42 es aa See At nae ep et any eee pn e) ay StS eS tC ae SO 220 
XXXIII. Glaciated surface on ridge between Roaring Fork and Castle Creek valleys _____- 244 
XXXIV. Glaciated surface between Hunter Creek and Woody Creek _._.-__..-....-___._. 246 
XXXY. Glacial valley of Roaring Fork, and remnant of pre-Glacial valleyaosesn eso eeee 246 
PNOXOXEV) Lee Mican ders ore oarin SSE OT kare pe set set ee a ee ee oa ye ee 246 
PROXGXGVA LT Lerraces Onl edeviOuUn tant Sanam Serra sean ne fA aan ae one Seen ea oe ee 248 
XXXVIII. Moraine of Hunter Creek glacier, on Red Mountain __..----.........--.-_-.--_.. 248 
XEXOXI XM le ye OluElun ter! ©reekapee see eee ee meen ee ee ence wa Ee Ly tee 250 
