CONT eS. 
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EERE RORECVANGMUDT ANS maeeoNe Nee once). oo eve eee Sona Bene sioe ss Sea sae moc Ve Seem nese xili 
ID RISRVAC Bie een eI pe ees ae a ae Many Sas la BALE Sew ca Secu ale Pie ae Oe Ne XV 
INTRODUCTIONS D yar Hap Human On Sipe ene eae sa eee tates a ihe eee ee ete ere i _ Xvii 
OS it © Trae re eae eae cee dpe aR Aes the SS es Set ae Sip IAS _ Xvii 
IDISCOMSRY <b atk eke tooedeeeeuuel soceae Sens SO BeSE cena eoces lesnescoopasatsescasesaeae A xix 
Deve lopmlenttaer saree eects se sees Ee ls see ae eters Msn BUN eats Ml ere Xx 
IASB R MONS oases sen ose SASS eat oat See er ees Sa Saas Sp SEES Dap eerie Ha ae eps amet Xxi 
Hx] OL uevUl OLA ape ee tee ee ee aa Uae ee ee tno Mees aeons hee eters scree, BOREL 
FOU ClO Mee ioe tam wee ieee mete = is ke ok LES ee Pie of ace eee a ry eee Se XXVili 
Geolosicalnnvesticabion Steses ssn =e ee a Ute eel Sere see Ae HOG 
Literature_.__.__-_ Esp NESE IU ae el epee A eee ee Shh tm ely LE le XXxii 
OURDINES ORE THATS MONO GRAPH erso ee Se ea BE SU eee a ate ate secrapeiee See sees ae XXxili 
CoNPrnne rocks orm ayilOns same ee ee eae ee ee Ea reed Mat een ere 1 
(Ghannmlives se Saco ae Mat thet Se See es ee See en a Ce ae Ae te Re ee 8 SNR Or Al ae 4 il 
Camilbriankse dinvenltse sertseersra a ees = ae Ae eh cee oN yn Se ye SES 5 eee arte we Sel 4 
SHIEH NC Ses ek ek Ss Bee eR a i ae er ae ae a ee 9 
IRA hiner Wanial terse ll eseemae een ee Role Gk ee ot any sac gree mya neal Ste of veh s_Aty 13 
Carboniteroustormalon sees se ase. eee toe es pie we SI eee ee ene Se ess 22 
Weadvalllewimestonemeeeme ccs sea nie fy cot lean ole eu) Wee Ate Re See ee ier ae ae 22 
plays). Glollavenitiyey. 52-5 eek ae SA en Sele OE aa Ae i ee ak ee ee ee eee oe 22 
Rinveablwewhimeston eran na sens teers oF aksee = cere anne ak Soa sorte See eiar sean aoe elas 28 
Weber formation._____._.__.__-_-____- SS A NS Re Rg I abate on Wn aft ws pe Re 3 
Mar OOTBROTINVA TION ae ane oe ase ne ee ee Bore ae serene ee ee fa ee epee reg 33 
EDI ASST GAOT ALON See ye ees hes ee, AA A CA I STR ie cul ee eee 37 
Red sandstones.._- ___- et ne rps RO Ee agen ps BoP Oe Raat cae any AO aha aed RRA ERE fe 7 
(Gunmisonwtonrmahlone see ee eee sea anes Be Se Ne EGA au Sais Sex trae oe Pee 39 
(Cretaccouspsericsiest teats alate nets Sone Lh epmaen UNI Sel sty alee el AIL ey tt US Seay 41 
Dako tawhormia tiOniyss sans oe ei oe coe Oe teenas oe eet tn 3, Baraka eed Bae Ae eI 2 | meeees ee Re 41 
Colonad Oso ali On ee A Pe En Ree ct: be RPE NE er 41 
Montanastormation=; ease sac ie se as ae eae aoe ie Se re eee ea cee 42 
aramietOrmatl Orbe mer sey ey les ya ene SEN PS RRO A ele Ri eyes sede MA a 43 
iPre-Cretaccoustuncomiormity eee setae 42 2 here pee eee See aetee = ere ee eee eee Sen 43 
Cretaceous Meth aTsya Ui COM OT ype eee eee ee ee 44 
Tn brs eehOC KS rem ater ee oye rs eee meen spe sien SUNN hy SEI re ENE Fey I pe) SE 45 
Diorite-porphyry ___.._.-_-.------- Sen Wee IS hr ieee ooo ee ee enn ame sere eae ee tes 45 
@QUaAKtz POLO DVT re soe A Nee eee aa at ae es See oben = OE Bes Soeee ssi oie 48 
(Acero fmubOmniUsive OCK Gace some oe ete ee ee ee Nek Ri Mepis aw ee 53 
CHAPTER II.—General descriptive geology___.__---.-..------.----------------------------- 54 
PAIS OMY SCC LE LBTT el) ee oe hemes oy ey eRe NY re A ates ete NO Se DES) el pee 54. 
Aspen Mountain.__.____.- Migs EMR AE CARCI TAS IN U6 i tape Be ae Ce Re Sot eR 56 
