Show THE GEOLOGY OS yale ut Utah ah sept 2 29 15 editor ali mining in ing review not 11 as a sor of but prof 11 t as a plain student of that science the writer J il space for a mild criticism of the ge giolo I 1 marysvale Marys mar vale which appeared in the 10 of the dinst and which had for copt aw di 1 parent professor Marcu marcuse joi aside from the evident fact that jones was wag in a hurry when writing the mia in question and which makes it unintelligible there is a serious error in anfe 14 statement of the professor where he akerd the formation of the marysvale Marys larys vale aiding d n brict to to be carboniferous quartzite and j stone atone the fossils do not hear bear out the asser tion only in one locality in this the writer found fossils sufficiently perfect k t enable one to identify the formation south of the monte del rey rev to professor jones refers about throe three fowl of a mile and a few rods north of the road is n gold run canyon isa bed of fossils a fawd which are perfect in this bed are numerous fossils characteristic of the upper among which are found some very fine specimens of icye gul arim at severe seven points near the bed in question upper siluria silurian limestone is found in horizontal position M 01 the upturned nearly vertical edges of lowet low si silurian luran limestone strata tr ata which clearly proves that the first great seismic occurred at or near the close of the lower low silurian age I 1 the formation last named a 36 and proves t fc I 1 a rule caps the quartzite latter t to 0 be either paleozoic or arc bean the formation in the monte lionte del rey lod ity is a fair type of that of the entire MW ma j v vale ale region and it is not to be credited tint r of the ipp dame nature sandwiched a slice 14 01 0 w and lower silt irlan rocks into a vast carboniferous quartzite quartette and limestone there is not the slight slighter ct evidence that gl prove professor jones assertion th drin duang Belknap was an active volcano tl statement tertiary period his e bovee overflow from talt mt belknap entire marysvale Marys vale region is entirely u lutena quartz of ule the q from the fact that the capp capping lug 01 ite and lime stones of this 9 locality is abert and that of mt belknap is is not the slightest resemblance in or appearance firnau t some two mi miles les south adouth of BAW limited are a number of craters crater 8 ocell occupying a chopo of aslee 1110 area which by their appe the 1 oy by dively recent activity furnished Ter tr to the in jagged lava neav may no de referred period the professors assertion that the copper belt is in lime clearly proves his recklessness of statement the copper belt is in rhyolite many other inaccuracies in professor tones jones learned article could be pointed out but sufficient has been done in that direction to partially offset the implied sneer neer and consequent injury for which his discussion of secondhand second hand information of this district was apparently intended very respectfully J P F GIBBS |