Show gj G GT j E 01 r I 1 OGY rrt OF OE itt afu M MX T BALDY AT ta GO GOLL A lr T 11 BELT alj w B ay at J F GIBBS io afi Marys Mary valo svata Di division earring barring complex conditions caused by unusual faulting along the foothills on the east cast and hack back into tho the mountains a distance of from three to four miles uld the geology of the marysvale Marys vale division is easily read it is clearly evident that at some depth tho the entire range is ia with a broken and faulted substructure of quartzite and that hat it may be credited loathe devonian age A small area to the thein orthof the gold run canyon road presents same contradictory evidence the limestone contains fossils to an earlier ago age than the 1 devonian its presence is ia an enigma and ca cannot linot be discussed at this time the preponderance cj evidence is that the area now represented by he che mt baldy tango range and its northern prolongation the galivan mountains between millard and sevier counties was und under ertho tho ocean during the Devon ianI ago age hundreds t perhaps thousands of feet of sandstone wasi was depos cited the succeeding lower carboniferous period cov covered ered the sandstone witha with a thick hod bed of limestone at the close of the lower carboniferous w a gentle upward movement occurred and to tho area under discussion rose above the surface of 0 the ocean where it remained during the enormous lapse of 0 time that intervened between tho the closing of the lower loer carboniferous and well lal along ong towards the close of the Tertia age whon when an almost worldwide world wide change of level occurred along the east side of and parallel with ith what is now known as the mt baldy range and its northern prolongation the range the earths crust was fissured from the surface down to the region of molten rock the fissuring suring ns was succeeded by faulting and an idea of the tremendous placement displacement dis m may a y be formed from the statement that door trail peak the ahlm highest elevation of quartzite is fully feet higher than tho valley while the eastern section of the quartzite is buried beneath hundreds of feet of basalt and other eruptive material the displacement extended northerly a dist distance ance of nearly miles in sevier valley the sandstone so conspicuous along the enst side of the mountains is on the east side of the valley buried under hun tion flon material this stupendous displace ment Is known as the sevier fault in the vicinity of marysvale Marys valo vale a great fissure on the cast paralleled the savior fault and is now marked by a fringe of basaltic foothills and volcanic activity must have continued over a long period after comparative guiot reigned along the mt baldy range rane the evidences of which are found in the mixture of volcanic bombs and debris in a belt of oolite bullion illion canyon represents a lateral fault extending westerly from the sevier fault apex of the divide between two mile and bullion is quartzite and is fully 1500 1500 foot feet higher than the quartzite to the north of bullion creek another area araa of stupendous displacement exists exist salong i along the cottonwood fault whore where deor trail peak rises fully 1000 feet above mhd thc quartzite zite oil the ridge to the south of cottonwood the topographical and cross section maps to which the readers 4 attention is invited will wiil serve to illustrate the profound northerly and southerly faulting of the basic formation of the mt baldy range the teachings of geology prove that the kl X WN I 1 f R ilya I 1 t a Q 0 e a p IF N I 1 LU C V X M N 1 0 pet r a te T t ea V div 2 V i 00 k cp su let v W IOU 8 51 Z JS ag OMI N 0 WN i a SL na Q k X aln I 1 R tv A 55 ra 4 r ne A L aa vt g aw J y ja 9 1 pj U 24 mthr cr I 1 J 1 1 if f t 16 AN t V Z rau r 0 01 X it I 1 VAI t II 11 za topographical HAP N I 1 N E R A L BELT barms dynamical history of the region to the west and southwest of marysvale Marys vale rs as A large aren area occupied by sandstone with a limestone capping because of the shrink ago of the earths molten interior or be cause of tho accumulation of gases seeking lines of easement the crust was fissured and brohen into enormous fr fragments pigments Ig ments or blocks blacks some soine of the great masses maintained their position but the larger portion settled down into the yielding mass of underlying Ink igneous matter from those yawning fissures enor enormous moua masses of and birdseye birds eye porphyry oozed up from the earths melted interior and formed mountain masses thousands of feet deep 4 again the un unstable crust quivered with intense sels seismic mt forces ther the old and but partially lid healed aleI wounds were opened ind and new fissures formed in tho ovel overly cyina lne eruptive mass and 0 great dykes of highly mineralized erali zed porphyry now mark the location and direction of many of those ancient rents through the weight of the superimposed super imposed mass of eruptive material the associated heal heiland heI tand iid aap gall ri strong so lutious au underlying sandstone wi was as altered chan changed ed 1 to tho the now familiar la quartzite quart eito there are sev er 11 localities whore where the sandstone escaped J those agencies and retains its old time characteristics and insensibly mer merges meres es into quartzite asat as it nears the igneous formations f or mat ions A the brief period of comparative quiet A a which succeeded the previous disturbances was broken by another uplift of the range lange and along ion the central portion extends extending irom from gold mountain south a distance boffl of some ten miles a great fissure was formed f horn bolm tho the surface surf ace down to the region of liquid firo fire the mig mighty aty force which split the northern portion of the mt bit baldy range also formed lateral fissures extending easterly and westerly from the great central rent those fissures became lines lilies of easement for tho the vast mass of magra magma seeking egress oress and froim molten depths dept lis hot gaseous mud flowed upward and formed great dykes of phonolite which today cheerily clinks dundei the teet feet of an occasional prospector while the eruption of i tho the phonolite marks the last throes of nature in the mt it baldy region subsequent of tho the phonolite occurred and in connection with other fissures already formed became channels channel for the upward and lateral flow of gold and silver bearing solutions extinct craters fields of dark colored colore dr 1 tra chite ridges of volcanic breccia dykes s and chimneys of obsidian in the phonolite prove that local volcanic forces were continued over a ion long period after the wide i spread eruptive activity hail had ceased the readers attention is now now directed j more particularly to the topographical andl cross see section tion maps while we investigate the isy of dynan dy nan cicali forces just busl described to avoid confusion the great porphyry dykes only have been mapped and the veins along the trend of those dykes are v prominently drawn ft p the cross section shows the deer trait trail r mine occupying a blanket contact which Q dips to the north at abolia about eight or ten de grees and is hidden by overlying dl debris in th that it locality the owners have hare blocked about tons of ore having an average H value alue of ten teli or twelve dollars per ton about H feet distant to the south many carloads A of ore were shipped and which netted the owners several hundred undred li dollars doll Effs per ton in A lead silver and gold it is believed that q the contaut contact derived its filling by solutions fram the north where eruption rock is in iii ovi evidence and probably associated with a lateral fault the high grade ore to the south doubtless owed its origin to a sec andary movement of solutions which passed it tir through rough the large body of ore leached beached it I 1 1 and transferred the concentrates to the uglier higher portion of the contact ti higher up on the deer trail escarpment is situated the lucky boy that years ago yielded a large quantity of hi high h grade mer curial ore the origin of which js is an un solved problem still higher on the mountain side le is sit the once famous pluto like elke the lucky luchy boy it proved to be a surface deposit in limestone the ore was alnio almost st pure silver and with no visible reason its presence in a locality where conditions are snuggly so unfavorable the first great porphyry dyke that tra verses almost the entire district occurs about three miles west from the mouth of 0 cottonwood canyon and occupies the great northerly and southerly fault line albang this dyke is situated the nelson a velb of gold bearing quartz that projects ts above the ground like iffie a great wall the branch vein is strong string and its permanency has been proven infields fields It yIelds silver 1 anu ana gold the standard is a monster ledge and yields lead silver and gold almost excle in sulphide conditions on the north end of df the dyke is situated e the copper belt to the west of the crystal mine and 1 l tren trending din northerly is a groat great dyke of por phyra that after traversing IQ marysvale Marys vale section bonds bends northwesterly into the gold mountain district along this dyke is sit gann pr r jur erol all r 14 high grade 1 ore and now has exposed a 15 foot vein that averages 20 per ton ane property is being worked by pittsburg people and ought to develop into a bonanza down on the bullion creek side the dyke forms the hanging wall of the webster at a monster vein with great chutes of galena and crystallized load ladd carrying gold and the basalt extends some three to four miles north of the canyon and is also alsa bounded by rhyolite rhy olito and other eruptive rocks the upward climb from robinsons to gold boid mountain is among basaltic buttes weathered to fantastic shapes and highly colored col bred or discolored through the action of strong the basalt ex extends t e n ds to 00 0 2 oil isom 01 ix IJ ay 5 c 1 T so rp it r croas 0 y R esou t a rt L 0 0 k 1 n 0 o IV F r 0 emht do d o z i I 1 anit 0 silver space will not permit of any description of the horse heaven and other fine properties along the great webster dyke another monster dyke cuts the country from the east cast side of mt delano over into bullion canyon there is a lar large lare 0 e number of fine properties on the dyke and conal contiguous u to it A study of the m maps aps will vill convince anyone at all fa familiar millar with the relation between geological conditions and the occurrence of veins and values that the country to the west of marysvale Marys vale presents one of the most inviting fields for intelligent investment to be bb found in the united states GOLD MOUNTAIN DIVISION alighting from the train at sevier station on the R G IV EV R the observant traveler to gold mountain will notice that the rugged and broken brohen foothills are composed of basaltic material As one proceeds westward and enters clear creek canyon he will note within a mile or so of gold mountain and to the stranger 0 I 1 is a subject of curiosity interest and study in some localizes loca lites the basalt caps tho the rhyolite tint but in a general way it merges so gradually into the rhyolite that no line of domar mar kation is visible contemporary with the great sevier of fault and extending westerly the earths crust was profoundly broken or fis along a line now represented by clear creek canyon and intersected and crossed by the great fracture which once extended from southwest cst of marysvale Marys vale along the present apex of the range through gold mountain and onward to tho the north into the Fa Pah vant livant range those principal fissures including innumerable parallel fissures were openings for the upward flow of rhyolite and kindred eruptive material materi al prior pter to the complete solidifying of the rhyolite the clear creek fracture reopened and basaltic material was forced up through the partially congealed rhyolite and which explains the blending of the line ot ol contact be beginning inning a short distance north of odthe the y g 77 7 7 4 VE ya 7 Z al 77 L Z V lit 4 v N ar P A 41 t A it t t Q 0 t 4 fir ON Z bech 7 0 e N 4 X U kc avi t t oct J 0 bip at qu Y q ja P aa A Z oiw A ic V V azy s V 1 OL IT e 4 4 M af pf Z J 4 T ap arg R cal aft h v ezit RAN yf d 0 re i G OL D MOUNTAIN DIVI SION V 4 A b T BA NINER the fact that the gorgo gorge has been sloughed ploughed hed fl deep ep in abed of ba basalt salti which as robinsons ranch is approached becomes more columnar in its structure the bed extends westerly from sevier station a distance of some fourteen miles where rhyolite becomes the country rock and forms the ape apex c of the range the earlier geological conditions of the mt baldy mineral belt are described in the marysvale Marys vale division of the subject and to laili lalitha reader is j 1 ail V annie caurie see topographical map a bolt belt of birdseye porphyry extends south erly a distance of a mildor two and disappears und under er the more recent rocks to the east cast of the annie laurie lauric an enormous helt belt comes in from mt aft belknap and forms tife divide between kirn berly basin and the head of deer crock creek and is also so far as exposure is conce rend the east cast local boundary of the birdseye this peculiar porphyry with its dark base aal freck ledl with almost waita chiti 1 14 i u specks and spots extends westerly over tho the tiptop divide and down down towards fish crock the dip of the magnificent annie laurie vein or veins is towards the west and on that side at a distance of perhaps or 00 feet from the droppings crop pings is a dyke of porphyry entirely distinct from the country variety the locality where the dyke Is most prominently exposed is on the hillside to the southwest of the BI blue ne bird tunnel the tiptop divide is the apex of a large dyko dyke of porphyry which occupies h a northerly and southerly fissure or lino line of faulting the great sevier ledge with its ma marvelous wealth travois traverses ses this dyke on a southerly strike and upon which the tiptop and other bonanza boganz a claims are situated southwesterly from tho the tiptop the formation changes the birdseye porphyry on the surface at least cant gives way to rhyolite and tra chite faulting is more conspicuous and explosive volcanic activity more in evidence within this area and well in towards grand old baldy is situated the fine property of bf the trappers pride the geology of the locality is given hy by a gentleman intimately associated with the mines and is as follows the country rock is altered which has undergone a series of faulting and thereby tending to make it permeable to the action io of f mineralizing mineral izing solutions the faults so far as developments have are parallel with the veins thus far no lateral faulting has been encountered to the east and southeast of the trappers pride and directly north of mt bol be knap adap isa great field of phonolite nearly all of bilich is highly stained with iron oxide the Ibcal locality ity yields beautiful specimens of nephritic phonolite several undeveloped but most promising veins are arc opened with short tunnels the decomposed composed filling pans gold in mining quantities in a general way the gold cold mountain faults lykes dykes and veins trend towards that stupendous uplift represented by baldy anil and belknap and incidentally proves that tho the majority of the lodes are true fissures gash veins occupying as they do shrinkage cracks in the cooled eruptive rock lack the regularity of strike so conspicuous in A the vein system of the major portion of the mt baldy region t it was intended to outline tho the predominating 1 n a ting formations but lack of ti time me at the last moment prevented the map will Ilo however wever serve to illustrate the general |