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Show HowWatcLMoun- ' tains Wt, e h In the Ovet, , tl book recentlj, , ,ute Gui'de- p. UnitedIStateSC,ished by the n, ' the history of 4"eIca' Survey, the Wasatch nw0rmation H which overlooks1" Ran'e, is graphically told ',Lake City. ua there were any before of region most of ft, !j"s ln this Wasatch Range e's in the as sand and mud ,nd dow" P-p of the ancient sea, ottorn became comijaeted tl,e-V LMof into sandstone, shal( . , ni;d oe stone. The sea bottom J J" "ll ally became land. ntu" Mnk earth has aged, her J er cracked and wrinkled, in.?s Laid Utah-Nevada region y ( day ,i cracks were formed ca rocks on one side or tV o'Ldo were moved slowly upwJt(j 'p'-i'2 downward, forming long ti(1 Z- along the cracks, steep m side and gently sloping m m other. Such breaks in the eanvs crust are called faults. Afaun D may be a few feet or hundred, ft of miles long, and the distancenwi which the rock beds on one side fdU slip past those on the other may P range from a fraction of an inch a to thousands of feet. When the11 rocks on one side are shoved up over those on the other side the " break is called a reverse or over- i thrust fault. . . |
