Show GEOLOGY jagy OF MT BALDY OLP GOLD G TN DELT BELT v aj ji JL W JL am JL 1 ua XU BY F G I 1 B B S division barring complex conditions caused by unusual faulting along the foothills on the i east cast and back into the mountains a distance of from three to four miles the geology of the marysvale Marys vale division Is easily read it Is clearly evident that at somo some depth s tho entire range is with a broken and faulted substructure of qu quartzite and th that tt it pay may be credited to thel the De devonian aget ages A small area to the north of the gold run canyon ro road ad presents some contradictory ir f evidence the overlying limo limestone storie contains fossils credited to an earlier age thaw than the 1 devonian its presence is an enig enigma ilaa and cannot be discus discussed sedat at this time the bro preponderance of evidence is that Y the area now represented by the mt baldy range and its northern prolongation tho the galivan mountains between millard and i sevier coun counties des wash was under tho ocean during the devonian age hundreds perhaps thousands of feet of sandstone was depos cited the succeeding lower carb carboniferous coniferous oni ferous period lod covered the sandstone with a thick t bed of limestone at ai the close oi of the lower carboniferous a gentle upward movement occurred and the area under discussion rose above the surface of the ocean where jt jit remained during the enormous laise of time that intervened between the closing centuries of the lower loler carboniferous and well along towards the close of the age when an il al most worldwide world wide wido change of level occurred along the east side of and parallel with what is now known as the mt baldy baddy range and its northern prolongation the range the earths crust was vas fissured from frodi the surface down to the region j of molten 10 rock the fissuring was s succeed succeeded od uy by faulting and an idea tremendous dis displacement may be formed from the statement that deer trail peak the highest elevation of quartzite is fully feet higher than ali the e valley talley while the eastern section of the quartzite it is buried beneatha beneath 1 hundreds of feet of 0 basalt and other eruptive material the dig displacement placement extended northerly a dist distance lance of 0 nearly miles in sevier valley the sandstone so conspicuous along the east cast side of the mountains is on the ast side of the valley buried under nuna huna arl 1 I ip perhaps of fot orup oin f 0 n t 5 s i A rf 5 f tion material this stupendous display displacement ba Is known as the sevie fault in the vicinity or of Mary Karys avale vale a great fissure on the cast paralleled the sevier fault and is now marked by a fringe of basaltic foothills and ToI volcanic canic activity must have continued over a long period after tive five quiet reigned along the mt baldy range the evidences of which are found in the inix mixture ture of volcanic bombs and debris in ih a belt of 0 oolite bullion canyon represents a lateral fault extending westerly from i rom the sevier fault the apex of the divide between two mile alile and bullion is quaTt quartzite zite and is fully 1500 than the quartzite to the north of i bullion creek another area of stupendous displacement ement exists t along the cottonwood fault where deer Trail peak rises lully fully 1000 feet above the quartzite on the ridge to the south of 0 cottonwood the topographical and cross section maps to which the readers attention is invited will serve to illustrate ther the profound northerly and southerly faulting of the basic formation of 0 thor tha mt baldy range the teach teachings teaching inc as of geology prove that the S n W Q t A V jaw Q N id v 01 e r r j t 0 o 11 V ili v vv 5 qui A L x et vt e 4 ok W Z 75 AN S tl V avi I 1 1 I 1 to 1 I 1 1 N 04 W HU ott W 12 0 ap 12 1 2 0 az 01 rm A 0 4 jp ax VA T 5 r UON 14 VE IN IN WF ral P U M F sz I 1 ott K V A 1 5 A q aj 01 I 1 yea p jap M int 06 RA PHI P N IN E dynamical history of the region to tho the west and southwest of marysvale Marys vale is as follows A largo area occupied by sand sandstone stoner with a limestone capping because bee aiese of the shrinkage of the earths molten interior or be cause of tho accumulation of gases lines ot of bas easement ement tho the crust was fissured and broken into enormous fragments or blocks some of the great masses maintained their the ir position but the larger portion settled down into the yielding mass of Unde underlying flYing igneous matter matted froni from thase yawning fissures enormous enor mour masses of and birdseye birds eye porphyry oozed up from the earths melted interior and formed mountain masses thousands of feet dee deep t again tho the unstable crust quivered ulvered with intense seismic forces the old and but pani ally healed wounds were opened and now new fissures formed in the overlying overl eruptive mass and great dykes of highly mineralized erali zed porphyry now mark the location and direction of many of those ancient rents lents through the weight of the su superimposed super p or imposed mass of eruptive material the associated fc and nd strong U V underlying sandstone was altered changed to tho the now familiar quartzite there are several localities where the sandstone escaped ca ped those agencies a eccles and retains its old time characteristics and insensibly merges esi into quartzite as it nears the igneous lor for mationg mat ions the brief period of comparative quiet which succeeded the previous disturbances was broken by another uplift ot of the range and along alon 0 the contra central I 1 portion extending from gold d mountain south a distance or of some ten teh miles a great fissure was formed from aiom the surface down to the region ol of 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 those fissures became lles lines of ease mont for the taid vast mass mans of magma seeking egress and from molten depths depth the hot gaseous mud flowed upward and anav 1 formed great dykes of phonolite which to day cheerily clinks under the feet of an occasional prospector while hile the eruption of tho phonolite marks we the last throes of nature in the mt baldy region subsequent local fissuring suring ns of the phonolite ph onollee occurred and in connection with other fissures al rea ready dy formed became channels for the up ward ivard and lateral flow of gold and silver bearing be aring solutions extinct craters fields of lark colored tra chite ridges of volcanic breccia bree cia dykes and chimneys of obaid obsidian ian in the phonolite prove that local volcanic forces were continued over a long period after the wide spread eruptive activity had teased ceased the readers attention is isnow now directed more particularly to the topographical and ross cross section maps whilo while wo we investigate thea economical results of dynamical forces justa described 1 to avold avoid confusion the tha great porphyry dykes dyke sonly only ihn have ve been mapped and ther veins along tho the trend of those dykes are prominently prominent lk drawn the cross section shows the daei trail i mine occupying a blanket contact which dips to the north at about eight or ten de grees and is hidden by overlying debris in that locality the owners have blocked blo ched about 1500 00 tons ions of ore having an average value of tey tenor or twelve e dollars per ton ab about out feet distant to the south many carloads 0 or ore were shipped and which netted the owners several se aa hundred dollars doll drs per ton in m lead silver and gold it is believed b el deved that the contact derived its filling by solutions flom the north where rock Is im evidente evidence and probably associated with at a lateral fault the high grade ore tor to the south doubtless owed its origin to a secondary movement of bf solutions which passed through the large body of ore leached beached it and transferred the concentrates to the higher portion of the contact higher fikher up on the deer trail escarpments tj is ij situated d the lucky luchy boys boy that lahat years y cars ago yielded a largo lar i go quantity of lush grade raab mer curial ore we origin 1 in of is an un solved problem still hi higher heron on the mountain slite side is situated the once famous A pluto like the lucky Micky boy it proved to be a surface deposit depo sitt in limestone liffie stone the orea was almost pure sil cioe ver 1 and with ny no visible reason for its presence iri in a lo 10 locality where conditions are so unfavorable ta first gre ft ithac tra verses almost the entire district occurs about thice miles west from the mouth of cottonwood canyon and occupies oc aples the great northerly and southerly fault line along this dyke is situated the nelson a r vein of gold bearing quartz that projects above the ground like ir a great wall the branch vein is strong and its permanency nency has been proven it yields silvery silver t anu gold the standard 1 ia s a monster ledge and yields lead silver and gold almost exal excl exclusively u in sulphide conditions on the north end of bf the dyke is situated wa copper belt to the west of the crystal mine and trending northerly is a great dyke of porphyry tha that after tt traversing aversing the marysvale Marys vale 1 section bends northwesterly into the gold mountain district along this dyke is sit siv wa t AR 1 th 4 6 1 i m 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 iho bullion creek side the dyke forms the hanging wall ol of the webster a monster vein with great chutes of galena and crystallized lead carrying gold and i jy NE YF ay V ax i i it phonolite Phon olit pa rp h rj clogs leellon 0 arn b a L 0 ok i N rr 0 nt acon aa I 1 Y DIM 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 side of mt kit delano over into bullion canyon there is a large number of fine properties prop artles on the dyke and contiguous to it it A study of the maps map swill will convince anyone at all familiar with the relation between geological conditions and the occurrence of veins and values that the country to the west of Marys Mary valo svala presents one of me most inviting fields for intelligent investment to he bb found in the united states 0 GOLD MOUNTAIN DIVISION alighting from the train at sevier station on the R G IV R R the observant traveler to gold mountain will notice that the rugged md and broken foothills are composed of basaltic material As one proceeds westward and enters enter clear creek canyon he will note within a mile or so of gold mountain a and n d to tb the stranger is a subject of curiosity 3 in berest and study in some localizes loca lites the basalt caps the rhyolite but in a general way it merges so gradually into the rhyolite that no line of mar kation is visible contemporary with the great sevier sault fault and extending wester westerly lk the earths crust was profoundly broken or fissured along a line now represented by clear greek creek canyon and intersected and crossed by the great fracture which once extended from southwest of marysvale Marys vale along t the he present abax of tle th e range through gi gold oliff mountain and onward to the north nort hintO jinto the Pah vant range those principal fissures including annu merable 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 blending of the line oi 01 contact beginning a short distance north of the 7 4 7 7 r 17 7 17 wo J V az J 1 vav 0 16 c I 1 L p A af I 1 2 ria J 11 1 lo 10 P r pi ok 1 ja A aa Y topographical ToPOGRAPHIC AC A P f tji GO L D M DIVISION TB A L D Y I 1 RE A L BE CT tho the fact th that at the gorge has been ploughed sloughed hed deep ina led bed of basalt which as robinsons ranch is approached becomes more columnar in its structure the bed erly from sevier station a distance of some fourteen miles where rhyolite rhy olito becomes the country rock aad a ad forms the apex of the thea range the earlier geological conditions of the mt baldy mineral belt are described in the I 1 division of the subject and band to toh r the basalt extends some three to four miles north of the canyon and is also bounded by rhyolite and other eruptive the upward climb from robinsons to gold mountain is among basaltic buttes weathered to fantastic shapes and highly colored or discolored through the action ou of strong solutions tho basalt extends to annie laurie see topographical map a belt of birdseye porphyry extends south erly a distance of a mile or two and disappears under the more recent litie litle rocks to the bast ast of the annie laurie an enormous belt belf comes in from mt ml belknap and forms the divide between kimlerly kimberly basin and the head of deer creek and is also so far as exposure is conce rend the east cast local boundary of the birdseye this pecullar peculiar porphyry with its dark f eld baw baso wl free lel WJ with th almo 1 i specks and spots extends westerly over the tiptop divide and down towards fish creek crack the dip of the magnificent annie laurie vein or veins is towards the west and on that side at a distance of perhaps or 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 p exposed is on the hillside to the southwest of the blue bird tunnel the tiptop divide is the apex of a largo large dyke of porphyry which occupies a northerly and southerly fissure or line lifie of laul faulting ting tho the great sevier ledge with its marvelous wealth trav traverses erseg this dyke on a southerly strike and upon which the tiptop and other bonanza claims are situated southwesterly from the tiptop the formation changes the birdseye hird seye porphyry on the surface at least 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 fino fine property of the trappers pride the geology of the locality is given 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 of mineralizing mineral izing solutions the faults so far as developments have baa e determined are parallel with the veins thus far no lateral faulting has been encountered to the east anil and southeast of the trappers pride and directly north of mt belknap is a great hold field of phonolite nearly all of is 19 highly stained with iron oxide the locality yields beautiful specimens of phonolite several undeveloped but most promising veins are opened with short tunnels the decomposed filling pans gold in milling quantities in a general way the gold mountain faults dykes and veins trend towards that stupendous uplift represented by baldy and belknap and incidentally proves that the 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 VIP the vein system of the major portion of the mt baldy region A it was intended to outline the predominating formations but lack og of time tit at the last moment prevented the map will however serve to illustrate the general to topography of this interesting region the B W and H division it would not only be an injustice to the B W and H section of mt baldy but |