Show OCY OF ajl iva MT 1 julji b RAI aa ju DY 1 GOLD D BY J F GIBES GIBBS A y marysvale Marys vale division barring complex conditions caused by u unusual faulting along the foothills on the east and back into tho the mountains a dis tance of from three to four miles the geology of the marysvale Marys vale division is easily read it is clearly evident that at some depth 4 the entire range is with a broken and faulted substructure of quartzite ind and that it may bo be credited to the devonian age A small area to the north of the gold run q canyon road presents some conti contradictory evidence the overlying limestone contains fossils credited to an earlier age than the devonian its presence is an enigma and cannot be discussed at this time y the preponderance of evidence is that the area now represented by the mt baldy range and its northern noi thern prolongation the mountains between millard and sevier counties was under the ocean during ingabe the devonian age hundreds perhaps thousands of feet of sandstone was deposited the succeeding lower lover carboniferous period covered the sandstone with a thick led bed of limestone at tho the close of the lower carboniferous i rf a gentle upward movement occurred and the area under discussion rose above the surface of the ocean where it remained during the enormous lapse of time that intervened between the closing centuries of the lower carboniferous and well along towards the close of the Tertia ray age when an almost worldwide world wide change of level occurred along the east cast side of and parallel with 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 tho the region of molten rock the fissuring was succeeded by faulting and an idea of the tremendous displacement may be formed from the statement that deer trail peak the highest elevation of quartzite Is fully feet higher than tho the 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 distance of nearly miles in sevier valley the A sandstone so BO conspicuous along the east side of the mountains is on the east side of the valley buried under hundreds perhaps thousands of feet of arup tion material tills this stupendous displacement is known as the sevier fault in the vicinity of M arys vale a great fissure S on the east cast paralleled the seater sevier fault and is now marked by a fringe of basaltic foothills and volcanic actie activity ity in must have continued over a long period after comparative quiet reigned along the mt aft baldy range the evidences of which are found in the mixture of volcanic bombs and debris in a belt of oolite mullion bullion canyon represents a lateral fault extending e westerly from f rom the sevier fault the apex of the divide between two mile and bullion is quartzite and is fully 1500 feet higher than the quartzite to the north of bullion creek another area of stupendous displacement exists along the cottonwood fault where deer trail peak rises fully 1000 feet above the die quartzite on tho the ridge to the south of cottonwood the topographical and cross section maps to which the readers attention ibn is invited will 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 f po rp it ry tesac tes R 1 fc 4 f wa V 4 rhyll E ta Y no vv il e 5 i g n 11 ap 9 W r lie rl el E 1 bestone s ne k OW wy L afi JA 0 wj fr 1 l rt lri at lu rr r w W UW kc aa s mitoi j tt tf t tn E rj r J A il r tK 40 tn w y VA N V r lv F T v i d Y tena ten a f ints iv aph l IN i 1 11 1 1 S L 14 11 ite y V X sy ki 3 rl il ip va 4 7 ay ak Z P I 1 jy aj il 0 A A N s a s aa y 4 c n 41 H hii im 0 y V I 1 qui r afta t il t aste iste i ste W fl kafe X X V vf d ri i J maat za jo 1 g p vp 5 lip s 10 lit sift ilk da 02 I 1 0 M 0 1 V sr ka tw ww mp J I 1 7 7 nj y b aai 11 1 ast IA T all tn IN nia yin 0 i avi PY ww W lv w i topographical ICAL MAP A P DI I 1 barms dynamical history of the region to the west and southwest of marysvale Marys vale is as follows A large area occupied by sandstone with a limestone capping because of the shrinkage of the earths molten interior or because of the accumulation of gases seeking lines of easement the crust was fissured and broken brohen into enormous fragments or blocks some of the great masses maintained their position but the larger portion settled down into the yielding mass of underlying igneous matter from those yawning fissures enormous enor moua masses of and birdseye birds eye porphyry oozed up from the earths melted interior and formed mountain masses thousands of feet deep again the unstable crust quivered with intense seismic forces the old and but partially healed wounds were opened and new fissures formed in the overlying el eruptive up mass and 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 heat and presence DI of strong solutions uie tle underlying 0 sandstone was altered changed to the now familiar quartzite quart zit e there are several localities where the sandstone escaped those agencies and retains its old ti time me characteristics and insensibly merges into quartzite as it nears the igneous formations format mat ione ions the brief period of comparative quiet which succeeded the previous disturbances was broken by another uplift of the range and along the central portion extending from froin gold mountain south a distance of some ten miles a great fissure was formed from the surface down to the region of oc liquid fire the mighty force which split the northern portion of the mt baldy range also formed lateral fissures extending easterly and westerly from the great central rent rant those fissures became lines of easement for the vast mass of magma seeking egress and from molten depths the hot gaseous mud flowed upward and formed great dykes of phonolite phenol ite which today cheerily clinks under the feet of an occasional prospector while the eruption of the Uto marks the last throes of nature in the mt baldy region subsequent local fissuring of the phonolite occurred and in iii connection with other fissures already formed became channels for the upward and lateral flow of gold and silver bearing solutions extinct craters fields of dark colored tra chite ridges of volcanic bre breccia accia dykes and chimneys of obsidian in the phonolite prove that local volcanic forces were continued over a long period after the widespread eruptive activity had ceased the readers attention is now directed more particularly to the topographical and cross section maps while we investigate the acono economical mical results of dynamical forces just described to avoid confusion the great porphyry dykes only have been mapped and the veins along the trend of those dykes are prom prominently ineptly drawn the cross section shows the deer trail mine occupying a blanket contact which dips to the north at about eight or ten degrees and is hidden by overlying debris jn in that locality the owners have blocked about tons of ore having an average value of ten or twelve dollars per ton about feet distant to the south many carloads of ore were shipped and which netted the owners several hundred dollars per ton in lead silver and gold it is believed that the contact derived its filling by solutions from the north where eruption rock is tin in evidence and probably associated with a lateral fault the high grade ore to the south doubtless owed its origin to a secondary movement of solutions which passed through the large body of ore leached beached it and transferred the concentrates to the hi hiher higher C her portion of the ahe contact higher up tip on the deer trail escarpment is situated the lucky boy that years ago yielded a large quantity of high hig h grade mercurial ore the origin of wh which cidh is an unsolved problem I 1 still higher on the mountain side is situated the once famous pluto like the lucky boy improved it proved to bet be a surface deposit in limestone the ore was almost pure silver and with no visible reason for its presence in a locality where conditions are seemingly so unfavorable the e first great porphyry dyke that traverses almost the entire district occurs about three nilles miles west weist from the mouth of cottonwood canyon and occupies the great northerly and southerly fault line along this dyke is situated the nelson a vein of gold bearing quartz that projects above the ground like a great wall adl the branch vein is strong and its permanency ina nency liris has been proven it yields silver ana gold the standard is a monster ledge and yields lead silver and gold gald almost exclusively in sulphide still bide conditions on the north end of the dyke is situated the copper belt to the west of the crystal mine and trending northerly is a great dyke of porphyry that after traversing the marysvale Marys vale section bends northwesterly into the gold old mountain district along this dyke is sit uatha ahe rr 1 aburn tous a producer oc high grade 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 a nn onster vein with great chutes of galena and crystal zed izod lead carrying gold and the basalt extends some three to four miles north of the canyon and idalio bounded by rhyolite and other eruptive rocks the upward climb from robinsons to gold mountain is among basaltic buttes weathered to fantastic shapes and highly colored or discolored through the action of strong solutions balut ions the basalt extends 0 to o op ka 1 MC beada nall a it phonolite Phon blite ill chotas of rot n C R Q t ajit N front cou awood J I 1 silver space will not permit of any de of the horse heaven and other fine properties along the great beat webster i dyke another monster dyke cuts the country the east side of mt aft delano over into bullion canyon there is a large number of fine properties on the dyke and contiguous to it A study of the maps will convince anyone bat at all familiar with the Te relation lation between geological conditions and the occurrence of veins and values that the country to the west of Marys yale presents one of the most inviting fields for intelligent investment to be found in the united states 0 GOLD MOUNTAIN DIVISION alighting f from the train at sevier station on the R G W R R the observant traveler to gold mountain will notice that the rugged and broken foot foothills hills 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 is a subject of curiosity interest and study in some localizes loca lites the basalt caps the rhyolite but ina in a general merges so gradually in rhyolite that noline of de markatoon mar kation is visible contemporary with the greaf great sevier fault and extending westerly the earths crust was profoundly broken or fissured along allne a line now represented by clear creek canyon and intersected and crossed by the great fracture which once extended from southwest of marysvale Marys vale along the present apex of the range through gold mountain and onward to the north into the Pa livant range those principal fissures including innumerable jn parallel fissures wore were openings for the upward flow of rhyolite and kindred eruptive material prior 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 abe blending of the line ot or contact Degi beginning fining a short distance north odthe 7 F Z V 7 7 T Z 7 jr y h N k t ih AA r V sit y v 4 a Z I 1 V 12 t 1 3 3 adt 7 I 4 1 1 1 S 00 L I 1 V N a 1 V J kill P TH 1 11 04 vi V P rm IS 4 C 0 4 19 an it 4 lai 3 Q ta 4 N ar MAP VT r ca J 7 ka GOL DM D M T IN DIVISION A id INT BAL DYN I 1 BE the arthe tact fact that the gorge has been ploughed sloughed hed deep in a bed of basalt 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 apex of 0 the range the earlier geological conditions of the mt alt baldy mineral bolt belt are described in the marysvale Marys larys vale division of the subject a and nd to cha the read reader e ra Is s referred annie aurio laurio L see topographical map a belt of birdseye porphyry i extends southerly ealya a distance of a mile or two and disappears under the more recent rocks 1 to the east cast of the annie laurie an enormous belt comes in from mt belknap and forms the divide between kimberly basin and the head of deer creek and is also so far as exposure is conce rend the east local boundary of the birdseye birdse yc 1 this peculiar porphyry with its dark base and freckled 11 with almost specks and spots extends we westerly starly over the tiptop divide and down dow n towards fish oe creek the dip of the magnificent annio annie laurie vein or veins is towards the west and on that ahat side at a distance of perhaps or feet from the droppings crop pings is a dyke of porphyry entirely distinct fron from the country variety the locality where rathe the dyke dyka is most prominently exposed is on the hillside to the southwest of the blue bird tunnel the lie tiptop divide is the apex of a large dyke of porphyry which occupies a northerly and southerly fiss or line of faulting the great sevier ledge 0 with its marvelous wealth ve alth traverses this dyke on a southerly strike and upon which the tiptop and other bonanza claims are situated southwesterly from the tiptop tho the formation mation changes the birdseye bird soyo porphyry on the surface at least gives w way ar to and tra chite faulting JB is more conspicuous and explosive volcanic activity more in evidence within this area and well in towards w ards grand old baldy is situated the line fine property of the Trappers pride the geology of the locality is given givon by a gentleman intimately associated with the mines mines andas and is as follows the country rock is altered which has undergone a series of bf faulting and thereby tending to macelt make it permeable to the action of mineralizing mineral izing solutions the faul faults ts so far as developments have determined are parallel with the veins thus far no lateral faulting has been encountered to tho ilia east and southeast of tho the trappers pride frrda and directly north of mt alt belknap is a great field of phonolite nearly all of bilich is highly stained with iron oxide ide the loda locality lity yields beautiful specimen specimens is of several undeveloped hut most promising veins are opened with short tunnels the decomposed filling p pans ans goldin gold in milling quantities in a general way the gold mountain faults dykes arid veltis veins trend towards that stupendous uplift represented by baldy arid 1361 knap and incidentally proves th thattie atthe that the majority of the lodes aro arc true fissures gash cash veins occupying as they do shrinkage cracks in the cooled eruptive rock lack the Tegu regularity larity of strike so conspicuous in the vein system of the major portion of the mt baldy region it was intended to outline the T j formations but lack of time at the last moment prevented the map will v however serve to illustrate tho general topo graphy gia phy of this interesting region thes the B W and H division 1 it would not only beaning beanI be an injustice nj to the B D W arid and H section of mt baldy but to readers of tho the |