Show i One e Of Natures Nature's Phenomena L LOGAN T OG-AN OG canyon was formed by erosion This is the theory of Prof William Peterson state geologist gist and bead of the department of I geology at the Utah Agricultural college l Logan gan This canyon contains beauty spots unbelievable able until they are seen The shows the power plant in Logan canyon anyon situated at one of the tho interesting interesting inter inter- I esting scenic seethe points ryr ar r- r w fr Vl ay LT t w L w 5 t t 4 p t AV i y U- U r s ts i Sy ti f r t f Q J w 3 l- l lf f j NT 0 w W w S S aK 4 s l W lJ tit f t W f b Y I 1 f d' d iy 4 Through Silent For Forces ces Produced Changes and Formations Picturesque e and Useful In This Land Landof of Wonders r and Marvels Marvel S Herald Rp Special lal OGAN May 8 Aside S. Aside from remarkable remarkable remarkable remark remark- L LOGAN able charm for the tho a auto uto tourist Lo Logan canyon presents one of ot the most interesting studies for tor the tho geologist to o b be i found In tho the entire west accordIng according accord- accord ing ng to Prof William Peterson PHerson state geologist and head hend of the department of geology at tho Utah Agricultural college The canyon according to Professor Protessor Peterson has b been cn formed entirely by erosion About 1 years Logan river has been cutting through the great block mountains forming forming- the Wasatch chain These mountains are called block mountains because of or peculiar origin To quote Professor Professor Pro- Pro fessor Peterson Cache che valley Is In a a- portion of ot tho the great cat basin formed by tho sediments of four tour oceans separated In time by millions of or years cars and by periods of ot land lanel Tho The first ocean which was the tho largest was also the thc most Im Im- Im It extended from the east cast margin of ot the Wasatch mountains an and to the west margin marg-In of the Sierra Nevadas Nevadas Ne- Ne vadas and remained an ocean for 20 O- O years yeara During DurIng- this great stretch of ot time more than two miles of ot sediment sediment sediment sedi sedi- ment accumulated principally of or lime lime- stone At the tho close of ot this period perlo land began to appear where the sediment sediment sedi sedi- ment was thickest due to an arch arching In up of ot the botto bottom i of ot tho the ocean This arching up caused used a a- serl series s of or north and Bouth south fractures and split the sediment sediment sedi sedi- ment Into blocks only a a. few miles wide east aBt and d west and a few CeW hundred miles long north and arul south The readjustment readjustment readjust readjust- ment of or these blocks formed the val val- leys YS and mountains Ins of otho the tho great basin All 4 Acre n Represented Dt d Logan canyon has been cut through one of or those these huge hugo blocks says Professor sor Peterson A trip through the tho canyon canyon canyon can can- yon shows practically all the tho rock formations formations- of or the tho Paleozoic or early carly geologic period Including the Silurian Devonian Mississippian Cambrian and Carboniferous formations forma forma- With each formation are arc found in abundance a all l the be fossils belonging to the period On UI the tho Bear lake side a wonderful opportunity Is given to stud study tho the Cambrian formation It was hero that Dr D- James Jamea D. D Walcott secretary sec sec- rotary of or the Smithsonian Institute and formerly director of ot tho the United States geologic survoY survey spent several weeks g In making a a- typical section of this period One of or the most remarkable things to bo be noted about Logan canyon canon is that the face of ot the thO orl original block forming the mountains fringing the tho east cast of or Cache valle valley can enn bo be seen at atthe tho the mouth of the tho canyon At one time this of ot rock rose rOMe two miles at atIn atan atan an In angle anglo of or bout J bout 60 degrees The lower lower low low- er cr part of or this f face ce can still be bo seen the upper face having been removed by erosion Glacier I Left eft Traces Trace Logan canyon was formerly the thc scene of or man many glaciers says sars Professor or Peterson Wherever glaciers in existence mount mountain ln lakes now appear scooped out of ot the tho solid solla rock Tho The glacier forming Tony T-ony Grove Gro lake the most beautiful In the tho canyon canon also left an Immense terminal murrain through h which tho the canyon road now cuts its Ita way about twenty five miles mUes from tho the mouth Springs s occur In tho the canyon of ot which tho the largest cst is Ricks Rick's spring formed b by tho water dissolving a tunnel tunnel tunnel tun tun- nel for tor miles s underground through the lIm limestone stone formation The springs from which Lo Logan an city gets Its water wLter Is of ot ofa ofa ota a sort and represents the seepage of or water for miles from the tho north between two Immense blocks of or rock rocIe The water Is only allowed to toes es escape po an and appear as a spring spring- because Logan Log river rl has eaten Its wa way through the upper block to tho the lower Comparison With Other Others To show aho the size of Logan Log canyon Professor Peterson made a telling comparison with other canyons canons of ot tho the west Immeasurably greater than Bryco's Bryce's canyon canon or Zions Zion's canyon it Isas is isas as ns deep as the Grand canyon of oC the tho Colorado and nearly as aa wide vide With a a. I width at nt the tile top of or five miles It Il presents presents pre pre- I a depth of one mile milo Thirty six I II I cubic miles of or rock have been carried awa away by Logan river In forming Logan Logan Logan Lo Lo- Lo- Lo i gan gan canyon canon says sn's Professor Peterson As As each cubic mile of ot rock means five the billion thirty six cubic miles means menn one hundred eight billion loads It has had t. I taken cn about bout years yeara to accomplish this Yet Logan canyon is still a young oung canyon c. as Its ruggedness will attest Logan Log river and other streams have covered tho the floor of or Cache valley with at It least 1700 feet teet of or deposit because we have reached that depth in one place In the valley and have havo ri not struck bed rock |