Show cu GEOLOGY art EO LOGY fra 0 or rt F ml hinr RAT BALM BALDY rw rrt LD p B ahll D E ar LT T B Y JF J F GIBBS marysvale Marys vale division barring complex conditions caused by unusual faulting along the foothills on the east cast and back into the mountains a distance of from three to four miles the geo logy of the marysvale Marys vale division is easily eastly read i it is clearly evident that at some depth the entire range is with a broken brohan and faulted substructure of quartzite and that it may be credited to the devonian dge age A small area to the north of the gold run canyon road presents some contradictory evidence the overlying limestone contains fossils credited to an earlier ago age than the devonian its presence is tin an enigma and cannot be discussed at this time the preponderance of evidence is that the area area now represented represent eAl by the mt baldy range and its northern prolongation the galivan mountains between millard and sevier counties was under the ocean during in the devonian age hundreds perhaps t thousands hou sands of feet of sandstone was deposited the succeeding lower ower carboniferous period covered the sandstone with a thick bed of limestone at the close of the lower carboniferous v tu 17 Y oga po rp it rp ral LV v K 11 em V e N mir N ia I 1 W rak W VAN pilo WV ag t vz 13 Z re ha h A tp RILL dett nill ra pu V W 0 as t R J cra 1 WAY i F A abr ati ae R vi ile n 91 vaa boef 43 g IN X Z 4 0 T topographical BA NERA Is E ott 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 0 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 side of and parallel with what is now nowlin known own as the mt baldy range and its northern prolongation the range the earths crust was fissured ed from the surface down to the region 0 of molten rock the fissuring suring ns was succeeded by faulting and an ail idea of the tremendous displacement may inay be formed from the statement that deer trail peak the highest elevation of quartzite is fully feet higher than the valley while the eastern section of the quartzite zite is buried beneath hundreds of feet of basalt and other eruptive material magerl al the displacement extended northerly a distance of 0 nearly miles in sevier valley the sandstone so conspicuous along the east side of the mountains is on the east cast side of the valley buried under hundreds perhaps thousands os of fed of at arap von tion material this stupendous displacement Is known as the sevier fault in the vicinity of marysvale Marys vale a great fissure on the east paralleled the sevier sev ier fault and is now marked by a fringe of basaltic foothills and volcanic anit activity must have continued over a long period after comparative quiet reigned along the mt baldy range the evidences evidence of which are found jn in the mixture of bf volcanic bombs and debris in a velt belt of oolite bullion canyon represent te a lateral fault extending westerly from the sevier fault the apex of the divide between two tivo mile and bullion is quartzite and is fully 1500 feet higher than the quartzite to the north of bullion Dalli ort creek another area of stupendous displacement exists along the cottonwood cotton wood fault where deer trail pac rises fully 1000 feet above the quartzite zUo on the ridge to the south of cottonwood the topographical p and cross section maps to which the readers attention 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 dynamical history of the region to the west and southwest of marysvale Marys vale is as follows A large atel area occupied by sandstone with a limestone capping because of the shrinkage of cf the earths molten interior or because of the accumulation of gases seeking lines of easement the crust was fissured and broken into enormous fragments or blocks some of tile the great masses ind maintained in their position but the lz larger portion settled down into the yielding mass of underlying igneous matter from those yawning fissures enor enormous moua masses of and birdseye birds eye eyd porphyry oozed up from the earths melted interior and formed mountain mounta lw masses thousands of feet deep again the unstable crust quivered with intense seismic forces the old and but partially healed wounds were opened and now new fissures formed in the overlying eruptive mass and great dykes of highly mineralized era erali lizea zed porphyry now mark kiark 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 of solutions ahe 41 W k underlying sandstone iv wac as altered changed t to the now familiar quartzite there are arc several localities where the sandstone escaped those agencies ag encLe and retains its old time characteristics and insensibly merger into quartzite zite as it nears the igneous for mationg matlon sJ brief period of comparative quiet which succeeded the previous disturbances was broken ily by another uplift of the range and along the central portion extending from gold mountain south a distance of some ten miles a great fissure was formed from the surface down to the region of liquid fire the mighty force which split the northern portion of the mt baldy range also formed forme d lateral fissures extending easterly and westerly from the great central rent those fissures became lines ot of easement casement for forthe the wast vast mass of mag ma seeking egress and from molten depths the hot gaseous mud flowed upward and formed great dykes of phonolite which toi day cheerily clinks under the feet of an occasional prospector while the eruption of the Uto marks marics the lost last throes ol of na ture in the mt baldy region subsequent local fissuring assuring of the phonolite occurred and in connection with other fissures al ready formed became channels for the upward and lateral flow lot gold and allver bearing solutions extinct craters fields of dark colored tra chite e ridges of volcanic breccia dykes and chimneys of obsidian lin the phonolite prove that local volcanic forces were con il linued over a long period after the wide aprea spread d eruptive activity had ceased the readers attention Js is now directed 4 more anore particularly to the topographical anil and cross section maps while we investigate the A economical results of dynamical forces just described to avoid confusion the great porphyry ip dykes only have been mapped and the JJ iveing along the trend of those dykes are prominently drawn 7 the cross section shows the deer trail mine occupying a blanket contact which k U dips to the north at about eight or ton ten de arees gre es and is hidden by overlying debris la fr that t ha t joca locality lity athe th e owners have blocked about tons of ore having I 1 n g an average value of t ten n or twelve dollars per ton about J feet distant dist antto 0 o the south many carloads carload a r of ore were werd shipped and which netted the j owners several hundred dollars per ton in lead silver and gold it is believed that 1 the contact derived its filling by solutions from the north where eruption rock is in evidence and probably associated with a gatei lateral dl fault the high grade ore to the south doubtless owed its origin to a f andary movement of solutions which passed through the large body of ore leached beached it and transferred the concentrates to the higher portion of the contact V higher upon up on the deer trail escarpment escarp meat is 19 situated the lucky boy that years ago yielded a large quantity of 11 aich h grade mer curial ore the origin of which is an un 1 solved problem still higher on the mountain side I la Is s situated 5 the once famous pluto like the lucky luchy boy it proved to be a surface deposit in limestone the ore was almost pure sil ter ier and with no visible reason for its pres enee in a locality where conditions axe are seemingly seem ugly so unfavorable p the first great porphyry dyke that tra verses almost the entire district occurs A about three miles west from the mouth of cottonwood canyon and ami occupies the great northerly nort heely and southerly fault line along this lyke dyke is situated the nelson Nd lson a vein of df gold bearing quartz quarte that broje projects acts 3 above the ground like a great wall 1 aa the branch vein is strong and its per ni has been proven it yields silver re anu gold the standard is a monster ledge and yields lead silver and gold almost excle sincy in sulphide conditions on the north end odthe of the dyke is situated the copper bolt f to the west of the crystal mine and trending northerly is a great dyke of por phyra that after traversing the marysvale Marys vale section bends northwesterly into the abild mountain district along this dyke is sit hated tho th j iolj a ima ducer high grade ore and now has exposed a 15 foot vein that averages 20 per ton tilo property is being worked by pittsburg people and ought to dev develop clop into a bonanza jadown on bullion creek side the dyke forms the haff hanging wall of mhd rn monster onster vein with great chutes of galena vand rand crystallized lead carrying gold and sa S V 1 N L y bat J 10 1 ZI 0 OY 2 h r I 1 clogs an r Q ct L aholtz t r a silver space will not permit of ay any description of the horse heaven and other fine properties along the great webster lyka ly kc ce monster dyke cuts the country from the east cast side bide of mt aft delano over into bullion canyon there issar iss is ar large number of fine properties on ithe dyke and contiguous to it A study of the maps will convince anyone mt at all familiar with the relation between geological occurrence of veins and values that the country to the avest vye of Mary avale presents one of the most inviting fields for I intelligent antelli ent investment to be found in the united states 0 D IVIS ION alighting from the train at sevier station on the R 0 W R R the observant tr traveler to td gold mountain will notice that the rugged and brol brokon dpn foothills are composed of basaltic material As one proceeds westward and enters clear creek canyon he will note athe i the fact th atthe gorge has been ploughed sloughed hed deep lna ina bedaf bed of basalt which as robinsons ranch is approached becomes more columnar in its structure the bed bea extends westerly from sevier station a distance of some i fourteen miles where rhyolite becomes the r country rock i and forms the apex of the range the earlier geological conditions of the it baldy mineral belt are described in the marysvale Marys vale division of the subject and to wb W b 1 e xe 3 the basalt extends some three too to four nines north of tho the canyon and is ed by rhy rhyolite alite and other eruptive rocks the upward climb frow robinsons to gold mountain is among bag basaltic altic buttes weathered to fan fantastic tactic shapes and highly colored or discolored through the action of strong the basalt efte extends ads mo to within a mile or so of gold mountain and to the stranger is a subject of curiosity into terest rest and nd study in some localizes loca lites the basalt caps the rhyolite but in a gene general ma way it merges ao w gradually into the rhyolite rhy that noline no line of de markatoon mar kation is visible contemporary with alie ahe great fault and extending westerly the earths crust was profoundly broken brohen or OK lis fis ared along taine now represented by clear creek canyon arid intersected and alid crossed bythe by the great fracture which once extended extends d f from rom southwest of marysvale Marys vale along the present apex of the range through gold mountain etain and onward to loathe the north into hito the pah vant i range those principals principal fissures including in ina t erable ni parallel fissures were openings 1 fa the upward flow of rhyolite and kindre ra eruptive mate ria 1 l prior to the complete odthe the rhyolite the clear creek fracture reopened reopen 1 dd and basaltic material was forced up through i h the partially congealed Thy rhyolite olite and which h explains the blending of the line of contact beginning a short distance north of the jamr I 1 i Z s w Z I 1 ar B I 1 ael F EZ n 77 7 T wa r ah um 5 t ZV alg tw BS a aaa 4 L at h bee A T llfra lu I 1 Is ew oki rait 41 75 1 4 i ir 3 T 04 Q ell W 45 P a 1 J Y A C ai C 44 C f ma 4 el 1 mr T ay A ax 0 top H CA L A P kofl ohp 0 L TAIN 51 annie laurie see topographical map a belt of birdseye porphyry extends south exly A distance of a m mile ile or two and disappears under the abe more rec recent ent pho oolitic rocks to tho east of the annie laurie an enormous belt comes ingrom in from mt Bellina belknap and forms the ahe divide between kirn him berly basin and the head of deer creek eveen and is also so far as exposure is conce Tend tho the east local boundary of it the bird birdseye soye this peculiar porphyry with its dark iobe and ft rea kLet mth almost white specks and spots extends westerly avor the tiptop divido divide and down towards fash creek dip of tip tha magnificent ont annio annie laurie vein or veins is towards ahe west and on ion that sif si deat tat a dl distance stance of perhaps or feet from the cropping is a dyke of porphyry entirely distinct froni tho the country v variety the locality where tho dyke is most prominently exposed is on oa the hillside to the southwest of odthe the tunnel the tiptop divide v la ia tho the apex of a I 1 lar largo ol dyko acho of porphyry which occupies a northerly anti and southerly fissure or line of faulting the great sevier ledge fedgo with its ita anai marvelous wealth traverses thia dyke on a t Ln dupon which tho the tiptop and other are situated southwesterly from froma tho the tiptop tho the for mation changes the porphyry on the surface at least gives way to rhyolite tra chite faulting is more conspicuous and explosive Plosive Vole volcanic ailio activity more mora in evidence within thi sarea and well in to avoids grandola gran dold baldy balderis Bal dyris Is situated the fino property of the trappers pride tho the geology of the th locality is given by a gentleman intimately associated with the mines and is us as follows tho country rock is altered which haa has undergone a series of faulting and thereby teri dirig to mako make it permeable todie to die the action of mineralizing mineral izing solutions the faults so far as developments have determIned are parallel vein a thus far no lateral faulting has hemd east and southeast of per perg 9 pride and directly north of mt del bel klapis apis as a great of nearly all of wiach is highly attained ata ined with iron ox 1 ide de The locality yields beautiful specimens of nephritic phonolite several undeveloped but most promising veins are opened with short tunnels the decomposed filling pasa gold in milling quantities in a general way the gold mountain faults dykes and veins trend towards that uplift represented by baldy api belknap arid abad incidentally proves that the majority of the lodes are true fissures gash veins occupying as they do shrinkage cracks IV in the cooled eruptive rock lack the regularity of strike so conspicuous in the vein system of the major porlean mt baldy region it was intended to outline the predominating formations but lack of time at th the blast last moment prevented the in map a will 12 however lio wever serve to io illustrate the general topography zi A interesting region them the M W aon it t would not only bean be an injustice to the B W and H section baldy but to I 1 tret iders of the mining alining review to omit a brief I 1 description of ono one of tho aho richest and most rece |