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Show May the joys of this tSSiOjfi Christmas season rekindle fFrk cherished memories, and fill IPl your heart with great happiness. mr ABC Auto Parts FABLE vs. FACT SAFEGUARD RAINBOW BRIDGE, WORLD'S LARGEST NATURAL ARCH, WITH ITS NEARBY MONUMENT GROUNDS 'V I Ji N' Mm - . . Kik In order to preserve, protect, and prolong the life of this renowned landmark, it is vitally essential that Lake Powell reservoir waters be kept out of the base area and foundational structure underneath the span of the Bridge, and at a safe distance down the channel away from the substrata supporting the tremendous weight of the Great Arch. The earth science, geochemistry, is defined as being "a specialized branch of chemistry dealing with the composition of the earth's crust." .From the authoritative textbook, General College Geology, by Eardley, we learn that 90 to 99 percent of the earth's crust, in volume, consists of the "silicate minerals." That some of the silica components (tetrahedrons) are "weakly bonded together" in the non-igneous rock formations. Example: the mica minerals which flake and fall apart readily; mica is a "hydrous silicate." We learn that "nearly all sandstones are porous" and "permeable". . ."sand beds and sandstones are generally good carriers of water." The sedimentary rocks, including sandstone, "will hold from 12 to 45 percent of their total volume" in absorbed water. Also that sandstones which contain the natural cements iron oxide and calcium carbonate including calcite are "only weakly cemented together" and are said to be "friable" or easily crushed. Calcium carbonate "is particularly soluble in water if carbon dioxide is presenf." Natural cements in Rainbow Bridge and its foundations include iron oxide, calciumcarbonate and its precipitate calcite, with the silicate minerals. To fill Lake Powell reservoir up to full capacity at the top of Glen Canyon Dam woutd inundate the base area and the supporting foundational structure of Rainbow Bridge to a depth of 46 feet, or 57 feet at flood margin. Rainbow Natural Bridge has stood for ages on its innately dry sandstone foundations. If kept intact it should stand for centuries to come. THE NATURAL TENDbNCY OF WATER IN THE RAVINE UNDERNEATH RAINBOW BRIDGE IS TO SOFTEN AND WEAKEN THE FOUNDATIONS: PENETRATE INTO THE PERMEABLE SANDSTONE FOUNDATIONAL STRUCTURE. SATURATE THE SUPPORTING SUBSTRATA; DISSOLVE THE NATURAL CEMENTS IN THE STONE AND DESTROY (BY DECOMPOSITION AND DISINTEGRATION) THE TENSILE STRENGTH IN THE (FORMERLY) DRY LAYERS OF ' ROCK. An experienced engineer in the chemical industry, was there any other similar lake or reservoir in the entire "principally in scientific and engineering testing and country from which to possibly draw correlative data." research" has written as follows: "The balance of the report was based upon library "The bulk of the (U.S.G.S.) report is purely descriptive of research and correspondence with other U.S.G.S. the terrain around Rainbow Bridge, but nonetheless it has geologists, and by data provided by the Bureau of several weaknesses. First, it is based on a five-day field trip Reclamation" .... "In sum, the report has all the earmarks to Rainbow Bridge in 1959, with two of these days spent of an armchair analysis." getting to and from the Bridge." - "This left three days at the actual site for study, hardly enough to be meaningful." Thank you, "Second, this field trip was made long before a drop of ' PS by water had been backed up behind Glen Canyon dam, so no MriIart possible consideration could have been given to the effects of Box 607 standing water on the relevent geological formations." "Nor Panguitcn, Utah I ) iffiuffirJ ) $195 to $2,600 bonus savings on hay and forage equipment during John Deere's (( Roundup of Bargains Reward yourself two ways. First you'll get the full-season ff ff dependability of new John Deere fc tbiT, II (I machinery ahead of the busy use pj.. r.ffQ?"l II season. Second you'll keep cash in :'" r?i 11 your pocket with the special discount f f-raa, ) )) prices listed below. Act now while I MHPclf''. (( 11 these pre-season discounts are f((fiinnnm,TT1 J J V available. See us about the hay )) "'. or forage equipment you need. ff II DISCOUNT DISCOUNT II UNTIL 1 MAR. 1977- 1 II MACHINES 28 FEB. 1977 30 APR. 1977 IL If 336 and 346 Balers; $195 $90 , 15A and 16A Choppers; II II 100 Stack Mover; 25 and I' 1 1J ' 34 Forage Harvesters 11 1207. 1209, and 1214 $390 $195 11 ... ff MowerConditioners; M - II 800and830Windrowers; ' II 466 Baler; Round Balers; 11 35 and 3800 Forage Harvesters I J J 1 00 StacK Wagon $520 $260 If 200 and 300 Slack Movers $650 $325 11 II Hydrostatic Windrowers; $1,040 $520 11 200 and 300 Stack Wagons II Self-Propelled Forage $1,950 $975 If Harvesters IV 230 Stack Shredder $2,600 $2,600 II No finance charges imposed until the next' use season. Ask us for II details. If dealer inventory of any product listed above is exhausted, it ( can be ordered. II 1 V-EQUIPMENT INC DBIJIHn tt : )) "To be in business tomorrow, you can't do todays farming with yesterdays equipment" I ADS RESULTS 6 |
