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<br />w <br />::.;, <br />c.., <br />r::, <br /> <br /> <br />Figure 6. Hand-pump water well In alluvial depoSits near Montezuma Creek In the Greater Aneth Oil <br />Field. San Juan County, Utah. <br /> <br />Ground Water <br /> <br />Tht' gmund-":Jler ..y..tt"1Il in lhl' \it.inny of the <br />Grt"aler Ant'th Oil Fit"IJ con..i..h pf:J ..equenct" of I:)l,.'d. <br />roc\.. aquifc~ and contining unib that art' IIKally O\'er- <br />bin by aquift"r.. in unct)!1..olid:Jled dt'pO"'lh (li~. ~}. <br />Allu\.ial :lquifer... are pre..t'lll in Iflbutary dramage..lhat <br />cUlllam ephellleral..trt"anh :md <l1i.lng tht' San Juan <br />River floodplain. Alth(1Ugh aquifer.. in alluvium an.. <br />limiled in ..ilt' and t.hid;ne...... the~ gt"nt'rally contain a <br />...uh...tantial \olulTle of fre...hwatt"r. The principal t'l(.'d. <br />nx:k aquifer.. in rocb (If ~k"o/.(lic age include lhthe in <br />Ihe Cretact"ou... Da"Ola SanJ...IOnt" Jura"..ic Morri..nn <br />Formalion (including Ihe Bluff SanJ..lnl1e ~krnheTl. <br />and lhe Entrada. ~a\aJ\l. and Wingate Sand..tnne.. (fig. <br />J). Generally. aquifer... In tht" Hluff. Emrada. :\";t\ajt1. <br />and Wingale Sand..tone... are confined In thi.. area. and <br /> <br />\\OI[('r l!Im... fmlll \\1.":1.. bt.'L'alhl' the pOlt'nliollletric sur- <br />fact' of llll' water in lhe aquifer.. i.. aht.w(' land 'ounace. <br />The Burro Camlln Formation and tht" Dakota <br />Samhlone are pan urthe Da"(lla ;ltluifer lThOlnas. <br />14X9. and Hm\dk 19901 or lhe "[Y' aquifer of A very <br />(14XOI (fig. .~). Rt'charge ,lnJ Ji..charge frum the <br />Da\..I1I01 aquifer i.. IlKalilt'd ht..'I.'au~e of tht' Jis,:ontinu- <br />oU"l'ro"lonal relTInalll.. of thl' fnmlalinn. Di...charge <br />from Ihl.' D;l\..uta :lquikr I" frolll ...pnng.~ along the con- <br />lal't bet\\ t'en lhe Da\..ota Sand..tolll;" and the undl'rlying <br />Bru..hy Ha..in ~lcmht.:-r of thl;" .\lorri..on Fomlalion. <br />fnllll \\ clb on higher mt'~:". and b~ e\'apotran"piralinn. <br />Thickne".. llf lhe Dakola aquifer in lhe ...Iudy areOl i~ <br />gl'nl'raJl~ Ie..... than 100 fl. <br /> <br />The \\'e..I\\OIlt'r Canyon. RecOIpture. Salt \\'a...h. <br />and Bluff Sand..!tlllt' .\lcmht..'r.. of the '\forri..on Fomla- <br />lion are in('ludl'd In the ,\1om...nn a,-!uifer (Thoma.., <br />Il,lXl,l. and Ho\\elJ... !l,lt)(ll, whit'h correlate.. with the <br />".\1"' :i,-!uih:rllf A\l'l! I ]l)'sblllig.. ~I. Thl' Bnhhy Basin <br /> <br />13 <br />