Show 0 o T T r ra AT raf B ELT itan GEOL kry ua OE vl r alt D ada rda ati y 1 RY BY J jf G GIBBS I 1 B B i DIVisi divisions arr barring complex conditions caused by anu unu unusual sual faulting along the foothills on the east and back into the mountains a distance of from froin three to four miles the geology of the marysvale division is easily it la is clearly evident that ansome at some depth j the entire range Is with a broken and faulted pub substructure structure of quartzite and i t that b it it may 1 be e credited to the devonian age A small area to tho the morth north of the gold run canyon road presents some contradictory evidence the overlying limestone conti contrina con taina ins lh fossils credited to an earlier age than the devonian its presence is au an enigma and cannot bo be discussed tat this time i tile the preponderance of evidence eviden cc is that thab the areas area now represented hy by the mt baldy range and its no northern athern prolongation the mountains between millard and sevier coun counties was under the ocean during the devonian age hundreds perhaps thousands of feet of sandstone wa was depos cited tho the succeeding lower c carboniferous period covered the sand stone with a thick bed of limestone at the clo close of chiy lower carboniferous a gentle upward movement occurred and the area under discussion rose above the surface of the ocean where it remained during ng the enormous lapse of time that inter t between betwee n the closing centuries of tile the lower carboniferous and well along alo ng towards the close of thib the Tertia ray age when an almost worldwide world wide change of level occurred along tho the east cast side of and parallel with what is now known as the mt baldy range and its northern prolongation the Pall range randd the eart earthy hg crust was fissured aured fiB from the surface down to the region of molten roelf the fissuring way was succeeded by faul faulting and an idea of the tremendous displacement may be formed from the statement that deor deer ti trail ail peak the highest of quartzite is fully feet higher than thair the valley while the rea eastorn section of them the quartzite is tim emried led of feet of basalt and other crup eruptive tive material I 1 the displacement displace mont extended northerly a distance t of nearly nilles mires in seyler sevier valley talley abe sandstone so conspicuous along the east side of the m mountains is on the east side of tho the valley buried under hun bun bluds i fi i i ti 1 t J 1 sa f I 1 i tion kion material mater lali this stupendous displace ment is known as the bevier fault in the vicinity of marydale maryvale Mary avale vale a great su sur r a on oil the east paralleled the sevier fault anil and is now marked mark I 1 eay by a fringe of basaltic basa itle ir foothills and volcanic activity must have continued ovea over a long period after comi Jaia live quiet reigned along the mt baldy range the ble eviden evidences pes of whichard which chare are found in the mixture of bombs and debris in a belts belt or ofa oolite bullion canyon represents a lateral fault extending westerly f from 1 idi m the sevier faults fault the apex ot of the divide between two mile and bullion is quartzite and is fully 1500 feet feW higher than the quartzite to the north of bullion creek Another area of stupendous displacement exists along tile the cottonwood fault where deer debr trail peak rises fully 1000 feet above the ahe quartzite on the ridge to the south of CUt cottonwood onwood the topographical and cross section maps tot toi which the readers attention da invited wilP will serve to illustrate the profound i northerly and southerly faulting of the ba sic formation of the mt baldy range T the lie teachings of geology prove that the lom 6 M corp U t qt w wa 0 R ayol I 1 ta 01 W L i niest c 1 or Q 4 Q luct aali 01 5 z k pot C en P P ft 0 10 1 C t e OPP r 9 P qz kau ta low 0 W A V e 11 ah JR 44 1 dott 1 IN nill 1 W 40 S kt my kg 31 uri W d 4 foe S I 1 ht VW r vt A 1160 or 11 A uil kw k W A P W ta r I 1 0 pl 41 1 t A I 1 WINO IT u M Z eill W za 0 qt I 1 liki R adl 7 X bl I 1 M sw 1 ill 0 T tf V gj v AoI aRav olt j al vo 11 I 1 I 1 AN I 1 TO vat BALDY DW KOM dynamical history of the region to the west and southwest of marysvale Marys vale is a as s follows A large area are occupied by sandstone with a limestone capping because of tile the shrink ago of tai the d earths molten interior or he be cause oft the accumulation of gases seeking lines of easement e ment ithe crust was fissured and broken antor antol enormous fragments or blacks some of the great masses maintained their theft position porsi tion but the larger portion settled down into the fag mass of underlying igneous matter from elioso yawning fissures enor monn masses of aryh olied and birds etycl aya porphyry oozed up from tho eares ear taft melted mellea interior lAter lor and fo formed mountain masses thou thousands of fedt deep again the unstable crust d with intense seismic forces the old and but partially wounds were opened open ed and an d new fi fissures formed in inthe the overlying overl yina erita tive mass dafid great dyads of highly min erali porphyry now mark thia location and direction ot of many of those anel ancient dint rents through the weight of the superimposed super guyer imposed mass of arul tive material Eat erial the associated nd af 91 ali f w 4 underlying sa sandstone was altered changed 1 to the bonx now far familiar nillar quartzite there are several localities where the dand sandstone stone es those thode agencies and obtains retains its old U time characteristics and insensibly merges merger into quartzite as aa the I nemis formation 4 i lations mat ions A the brief period of comparative quieta which succeeded the previous disturbances was vas broken by another uplift of the range 1 and along the eLi central itral port portion ex extending irom gold mountain south a distance our off some ome ten miles agrant a i fissure was formed i 0 irom from the surface down to tile the region 0 I 1 liquid fire tile thoi mighty force which split 1 the northern portion of th the mt alt baldy range 11 also formed lateral fissures extending east cast erly eily and westerly esterly iv from the great central rent those fissures became abines ot of ease ment for the finals of mag nia ma seeking egress ogress 0 s 1 and andl andstrom from molten depths the hot gaseous mud flowed upward and formed great dykes of phonolite which to s day cheerily clinks wider under the feet of an aia t occasional prospector i while the eruption of the phonolite 7 1 marks the afie last eyl daous throes of na ture in the mt baldy re region 0 ion subsequent local docal fissuring of the phonolite occurred L and in connection with other fissures al i rea ready dy formed became channels for the up tip ward vard and lateral flo flow iv of gold and sliver silver bearing solutions lons jh extinct cral era fields of dark colored 1 tra chite ridges of dykes and chiri chimneys ineys of obsidian I 1 in n the pl phonolite prove that local volcanic forces wore con coil over a 1 long period after the wi wide d 6 spread eruptive activity hafl had ceased A tile the readers attention is n now ow A directed ire acted more particularly to tho the topographic topographical all 1 and cross section maps while we investigate the i economical results of dynamical forces just i described to avoid confusion tho the great porphyry ry dykes dyka only have been mapped and the ij veins along the trend of those dykes are i prominently drawn j the cross section shows the deer i mine occupying a blanket contact wh which dips to the north at about eight or ten de 1 grees and is ill hidden adden by overlying debris in that locality the owners have blocked about tons of ore having an average t A value of ten or twelve dollars per ton about A Q feet distant to the south many carloads carl dads 1 of ore wore were shipped shipp ei and which netted the 4 i owners several hundred dollars per ton in lead silver and gold it is belaev believed i ed that i the contact derived its filling by solutions Elond from the north morth where eruption rock is in evidence and grobi probably associated with a lateral fault the hig high grade ore f south doubtless owed its ita origin to a secondary andary movement of solutions which passed X i t through the large body of ore le ached it b and ti transferred the r concentrates r aads to 0 the higher portion of the contact i higher gher up on the deer trail escarpment j is s situated the lucky boy q that years ago i yielded a large quantity of high grade mer curial oro ore the tha e origin of wha watch e li is im an un t lebi i i still ghigli higher e r on the mountain side jc s situated it tho the once famous phito like the lucky litchy boy it proved to be asure ace deposit in limestone the oredas ore was almost pure silvor silver and with no vituld reason for its pres ence in ill a locality where conditions are seemingly so unfavorable tile the first great porphyry y dyke that tra verses alinosi itlie entire district occurs ab about aut three mires miles west from tile mouth of cottonwood canyon and occupies the great north northerly bily and southerly fault line along alon B this dyke is situated the nelson a vein of gold bearing quartz that projects above tile the ground like ng a reLt wall all tive the branch vein is h strong andias per manenty has boen been proven It yields silver i ana a ila gold I 1 tre standard is a monster ledge and 1 yields lead silver and gold almost ali host etchi Ij in sulphide conditions on 01 i the the dyke is situated 1 14 4 thie the copper belt il to tife the west of the crystal mine arid am I 1 i trend trending ilig northerly jsu is a great fidyke dyke of porphyry that after traversing tra the marysvale Marys vale section bends northwesterly into tile the gold 4 mountain district along this dyke is sit au jsn high grade ore and now has exposed a 15 foot vein that averages 20 per ton ane jno perty is being work vork edby 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 monster ve vein in with great chutes of galena and crystall crystallized zed lead carrying gold and 0 01 J J phonolite Phon olit crotsl be alon aj R h q 0 t i t lu a a V bait 01 t silver space will not permit of any description of the horse heaven aven and other fine properties along the great webster dyke another anether monster dyke cuts the country froin i rom the cast side of mt aft delano over into bullion cai canyon ryon there is a largo large number of fine linea properties on the dyke and cond contiguous u us to it A study of the maps will convince anyone ct at till all familiar with biti the relation between geological col co conditions n editions and the occurrence of veins and values that the country to the west ot of marysvale Marys vale valc presents one ot of ane most inviting fie fields ils for intelligent 0 investment to i bo be found in the united st states ates sa 0 1 i rt v GOLD MOUNTAIN DIVISION i i alighting from the train at devler station en 11 th the e R 0 IV R R the observant traveler t to 0 gold mountain will wili notice 0 1 that the rugged and brolien broken foothills are composed of ba baltic material I 1 As one proceeds westward 1 I eai and id enters clear creek canyon he will vill note within a mile oi or so of gold mountain and to the stranger k is a subject of curiosity interest terest and study in sonic some localizes loca lites the thea basalt caps the ali rhyolite olite but in a general way if it merges so gradually a dually into the rhyolite that no line of demarcation mar Inar cation kation is visible contemporary with the great sevier fault and extending westerly the earths crust was profoundly broken or fissured along a line now represented by clear creek canyon and intersected intersect eff and crossed bytho 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 no north rth into the Pah vant range those principal fissures including innumerable in parallel fissures were openings for I 1 the upward flow of rhyolite and kindred eruptive material prior to the complete solidifying of the rhyolite tile the clear creek fracture reopened and basaltic material was forced up through the partially congealed rhyolite rhy olito and which explains the blending of the line ot contact I 1 beginning a short distance north of the I 1 Z 2 7 7 7 L 9 ft 7 5 w 4 EX 0 silo 6 ia i A 1 I 11 of ld I 1 1 J 4 11 1 A 14 4 X pl at e A 4 7 r k ae ju v to ua r ja 1 t tc 1 A 4 J T 5 vi A Y N G fv cf Y S V 11 1 1 1 i I 1 af K VA 70 i ae MAP ff hc ak a 0 Y GO L DM U nita I 1 NT I 1 V IS 10 W af ea the fact that the gorge lias has been ploughed sloughed hed deep in inabet abed of basalt which as robinsons vanch la is approached becomes more columnar in its structure the tha bed extends west erly aly from sevier station a distance of some fourteen milles miles where rhyolite becomes the country rock and farms them the apex of tho the range the earlier geological conditions bof of the mt baldy mineral belt are arb described in the marysvale Marys vale division of the subject and to whish is referred fn an tho the basalt extends somo soma three to four miles north of the canyon and is also bounded by rhyolite and other eruptive rocks tho the upward climb from robinsons to gold mountain is among basaltic butt buttes weathered to fantastic shapes and highly colored or discolored through the a action c tion 0 of f strong sol s solutions ol tit ions tho basalt extends ex tendis to annie laurie see topographical map in a belt of birdseye porphyry extends southerly a distance of a mile ortho or two and disappears under the more afore rece recent ut phon litie olitte rocks to ito the east of the annie an nie laurio laurie an enormous belf colaes in from mt belknap and forms I 1 the divide between wm I im berly basin and the head ot of deer creek and is also 1 so far as exposure is conce rend tho the east local boundary of tho the 11 birdseye this PC peculiar cular porphyry 17 with its dark base anal freckled with almost i specks and spots extends westerly oyer over v the 11 tiptop divide and down towards fish creek the dip of the magnificent annie laurie ll 11 vein or veins is towards the west and on that side at a distance of perhaps or f feet from the croppi droppings crop pings ngsi is a dyke of por s phyra entirely distinct from the country J 1 variety yi the locality where the dyko dyke is most A prominently exposed is on the hillside to the southwest of the blue bird tunnel the tiptop divide is the apex of a large dyke of porphyry which occupies a northerly and gout southerly herly fissure or line af faulting the great sevier ledge wit with hits its marvelous wealth traverses this dyke on a r fsmith southerly erly strike and upon which the tiptop H a and nd other bonanza claims are situated r U g southwesterly from the tiptop the for 3 mation changes the birdseye bird porphyry on n the surface at least gives way to rhyolite te r 4 V and tra chite faulting is more conspicuous and explosive volcanic activity more in evir dence within this area and well in to wards grand old baldy is situated the fine property of the trappers pride the geol i ogy agy of the leca locality lity is given by a gentleman intimately associated with the mines and is zas as foli follows lows the country rock Is ia altered which has undergone a series of sr faulting and thereby tending to make it per to the action of mineralizing mineral izing eions the faults so far a as s developments have determined are arc parallel with the veins thus far no lateral faulting has das been r to io the cast and southeast of the trap pers pride an and directly north corili of mt A knap is a great field of phonolite nearly af pf all of |