Show OF OP ASPHALT VEINS iNS III IU dr if time the tlc in inthe II mu th the Fields Field of Itah A clinic b by Ceorge korge or e Homans Eld- Eld ridge on omi the thc formation of a asphalt phal phalIn In and the time OC occurrence of that element ele ole- ment cannot but bu appeal to this community com corn which la has been een called upon uon to 10 protect the time title to Interests Inter litter l' l ests t In mm an nn Issue i In time the tw land office Asphalt v veins P pays Mr h are scattered through most of the tho ex explored explored ex- ex territory of the time cath earth and amid are ale of ot far Car wider distribution than metal n-metal- veins The Tile wider occurrence of asphalt veins Is due W l to the time fact that petroleum the lie mineral from roam which the time asphalt huts has been derived has an extel extensive lv dl distribution In th time the stratified strati strati- fied led rocks from fromn the thu oldest to the time youngest In Ulf crumpling to which the crust of the earth carth has been subjected sub sub- such strata have frequently leen been folded and anti then exposed by hy erosion There Thero Is no marked difference In InIn vein In phenomena whether the ns fissures he filled fled with wih bituminous matter mater or ores anti and gangue Time The character of an asphalt mait vein depends largely lv on the time nature of the country rc rock I Time The purer varieties of asphalt occur occur oc oc- oc- oc cur CU In fissures the time urination formation of oC which has been brought about by I folding or contraction Whoa When fractures cure due to folding a n displacement of or the tee originally adjacent walls wails has lias ha often oron taken nl while In the time fissures en place fis cs produced pro pro- by contraction this does not necessarily occur To assign the time origin of or a n fissure to lo time tho t latter cause Is however often attended with considerable uncertainty taint because lack Inck of displacement may accompany phenomena of oC the lie first class The rime greatest asphalt asphalt- Oiled filled fissure In Sn time the world I Is one In which there Is no displacement the time vein having a maximum width of 18 feet and a length of no less than tin 10 measured miles mlle Others occurring nearby nearh aro ame on only I a little smaller and andIn ant In a addition display la U p ll phenomenon of forking In both instances the veins tron trend In the time direction of tile the to till dip dIl of the time enclosing strata stra They are therefore more probably the result of contraction than timan thal of oC folding the ti-me axes of the time flexures trending at nt right angles to the time veins The Time lineal extent of asphalt fillet fissures varies varleN from Crom a few feet Ceel to toman man many miles In Jim width time the fissures when single and md uninterrupted L by horses or Inclusions that have In ira from flom the time walls wals range e from a maximum maxi mum of 18 IS feet down to extremely line fine thread like crevices whose length Is alwa always s disproportionately great A clean clenn fissure fre frequently attains a n width of several se feet In most eases cases instead of or a a simple fissure a zone of fissures has imas been formed formell in which a largo lam number of or separate fractures occur tho ho smaller ones Interlacing with Ith ono omme Oll another anti anil nt tho ti-mo whole network together affording a large lir e aggregate ng space space- for the time pas- pas passage passage sage sago of the material is with Ith which thet the time t fissure surl Is filled This mode of oc occurrence oc- oc currence Is time the more mor Interesting as It affords a close cose parallel to characters I more macie commonly found Cound amo among veins Ins which CaT carry metallic minerals particularly par liar those In areas of crystalline or In th time the sedimentary slates of more recent epochs epochs Simple ore filled Oe fissures on omm the other hand a are usually confined communed to heavy bedded Y rocks locks such as limestone and sandstone sandstone sand sand- stone stono or to rocks Among a asphalt veins eills aro are found some remarkable examples of ten ten- ul y In the lie re region lon where the wonderful won wun- veins vel liS of Utah are aro found tho timo writer hits has observed ono one Instance Insalco 0 of an arm uninterrupted filled asphalt fissure of or a a. width one half an anInch Inch Ilch a n lineal of or full lul till I oo 00 feet It I appears appeals at time the tw surface as a Jet black line Ino and ami when viewed Nl from a distance carbon resembles a crayon mark marl drawn on the time rolled eroded surface of light h sandstone ton colored yellowish yeo gray gla Time The downward extent of the fissures Is more of tf te deep P workings remain un un- certain In II general however the time vertical vem range of tC the time more persistent veins of f clear cicar material Is greatest In Inma ma massive lve bells beds o of san sandstone indeed ItIs It ItIs I Is practically extensive co-extensive e co with the thickness of time the the enclosing rocks It I Is IR thought thou ht that the lime he great sat Cow Bo Boy vein In eastern Utah hall had before erosion I affected ti tim tho o strata strata a vertical ran range e of ofal at al least 2000 feet fee which is s the time thickness thickness thick thick- ne ness of the massive masho sandstone in which It occurs In Iii addition to lo the time long straight hl veins another type nm ama may often oUen be noted in imm which the time veins show how a closer re relation re- re lation laton to the time folded structure of the time enclosing r rocks m cl s and auth exhibit a n higher degree of complexity An Amm excellent Illustration of this his type mo may nitty be seen In iii tine one of tf the thc asphalt districts of Cuba The Time veins are located on omm the time nose or 01 01 ea easterly lerl end emit of an amm anticline On the tIme sides or 01 limbs of tf the time fold Cold at SOnic some SOne little distance from frol mum Its Us downward pitching extremity are aro O ono one or 01 two normal strike fissures As one olle approaches approaches ap ap- ap- ap pm the lime end of the time fold foll the time rocks become relatively broken and amid crushed and amid the timo regularity of if the thu strike fissures fis Us- us- us sum sum-es S Is lost In lii the time complexity of the time interlocking fractures rime Tho general trend remit of or the thu zone zono of fracturing however however how how- ever er continues as us a cm whole to follow ollow tile the strike of time the beds hes curving around the pitching end of the time fold Cold and Hl conn connecting con com n the tho strike e fissures on oum tho tIme one limb with those on omm the time other Time The strata in In this case comprise a succession 51 sion slon on of thin bedded anti and calcareous clays clas The rime predominate pre pie dominate but Lut tho time clays aro are In lii sufficient suf suf- abundance to give to the time measures mea incas ures tim a thinly laminated character rendering them in a sense transitional transi lonal between a typical and nHI a sIn sIn-dy 8 series rles The veins therefore there there- fore are nrc likewise transitional neither as its re regular ular as aM those usually found In rocks nor as Irregular heavy hC as tho those c in hal s |