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<br />20 Sedimentology and Slraligraphy of the Palisades, Lower Comanche, and Arroyo Grande Areas 01 the Colorado River
<br />
<br />Ji,:latl:J a ..lagl:-Jhchaq;.... r....bll\llhhlfl;J1 th.... tim.... \lIJ....fl''''I"
<br />lion thai h Jllr....rL.n! from lhat Ill' loJa~
<br />ThL' ....k\alloll OflhL' 1;1l1J ..urtilL..... al ......L.III\l1:' 17'13.34:'
<br />fill I.. 10\\ L'll\IUgh thai till" lo...allllll L'\'\lIJ l:k' IflUnJal....J h~
<br />a fto\\ ....llmpar~lhll: h, or ..hghtl~ k.... than thai of Ih.... 19~ I
<br />fllllwJ. anJ pll....lhl~ h~ lh... p.:,l" l,fth... 1'15-110".1 '\1111<.' olh.:r
<br />..lr<lllgrarhK ....'cllOn... mu....h gr.:aIL'r r1".1ll.. 1\\ nh Jh....h;lrg....
<br />hlgh....r lhan ....:J11 n... ~K...Ut:Jl...I~ ......lllll;Jl...d u"1llJ! lhl" ..tagl:-dh-
<br />....h;Jrg... rL'bllllll..hlfl I \\\lu!d b..' r....yuir...d I., J"POSH .....Jlln..'1lI1'1l
<br />lh.: ,,'\I..l111jo! bnJ ..url,lc" hUr!;K..' d.'\;IIII'I1" ,Ir..' -IIIl 71 [) III
<br />al ........ll(1n 1. 791>.1-1 i III al .....clll'n ~. 7\r ~."(I1l1 ;11 ..n:lLoll J.
<br />79:'.:\7-1 m:ll ........lJull 4. and -'l:i,5~:, III ;11 .........llon I". Th... 110l'r
<br />llflh..' ,Irn,;.o. In CI'1l1r;hl. \\I'uld h..' lllunl!;lI,,'d h~ .J lir.....h,lrg...
<br />of -5.1\1'0 m "I ]1\0.001111 ..J allh... Il',,'all.m of ~..'...1I'1I1 h.
<br />a....uming lhatlh..' rt.'glPlldl <.1\ ..ra);..' L'lll1Jlll"l1~ n:prL.......lll...J b~
<br />Ihh ..lag...-JI.....rurg.: rdalllln..hip \\"uIJ hlJld \1 ItJll[ lIIn.....lh...
<br />kId oflh.... 1'/<)(, BHB!. 11I..,J ...\pt.'T1l11..'n1. ..u....h a dl~\.harg.: l,'t
<br />gr...;jl....n \\,'llIJ n...n....cd..d III rrol1W\<." r"'~II'r;jII\'" tlu\lal ~,,'dl-
<br />m<:l1I d,'pO'ollllln 1Illhh an.o~(l/h"I\\.'rk.
<br />
<br />Lower Comanche Site Summary
<br />
<br />Straligr<l[1ll1.... ~':C(llll]'o d':~crlh....J mth... "l'uth.:rn. .JrT\l~\l-
<br />1I1.:",...J Lll\\....r l'olllandlL' ar.:;! 111.1"::11..' lllllhl[1k ':ph."k~
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<br /> 797
<br /> 7%
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<br /> 794
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<br />$
<br />w
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<br /> 787
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<br /> 0
<br />
<br />Lower Comanche
<br />
<br />'''I'
<br />
<br />1921
<br />.
<br />195/
<br />19S13.....
<br />1983 .
<br />.
<br />./
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<br />. 19?j;.2QO-l
<br />,I
<br />.
<br />
<br />'coo 2.000 3000 4000 5000
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<br />'000
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<br />DlSOlilrgeim SI
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<br />Figure 19. Stage.djschargerelallonshlp lortheLower Comanche
<br />area. based on surveyed elevallOn ot dnltwood logs Inferredlo
<br />represenl h,stom:al tloods Only POlnlS consrdered to De of'good' Of
<br />.excellenf Qual11y were used to estabhsh lhls relatjonShlp The19 21
<br />POIn! that was surveyed comes trom a clustef 01 logs -1,2 m above
<br />a well. defined 1951 driftwood assemblage No WOOd was Identified
<br />that could conhdenllybe Iderltltled as an 1884 deposit the dashed I me
<br />Showslhe 18841loodd,schafge as II would mterseCIW'lhTheextrapo-
<br />laledstage'dlschargecur>.-e
<br />
<br />.
<br />llfllu\I,t!...:JlIll..nt.lIilln t.,II"\\l'J b~ r.:v."rking at th.: land
<br />~urr<.l(e.\"'(lII:1ll .....Jirn<:ntar;. ..lru...lur..... M" pr.........nllTl ~orn....
<br />"flh<.' lill<.'-grall1l'J JL.r,,~ib, TIlL' .lhunJall! bulf-Cl,lor...d ..i1t
<br />and ~:HlJ mal..'rial in ~""CIII'n~ I. ~. ,Ind 4 l'11Uld he lIlt...rpr....lcJ
<br />a.. tnhulary allm lum J...n\..J fr"lll ,l"',,hall J"'plhll.~ up~lrl'am
<br />and un \allL'Y ~r.'r<.'~ dunng r.'cal nullltJ"....\ l't1I~. ,'r ,I~ "l'Jl-
<br />nl...nt d..rj\cd fr"1l1 lh.' t'll!'>radu Rl\...r c 11u\ lal llr r..'\\..rk.:J
<br />i1"'llllanl Ihat ma~ ha\... 1111crh..Jd..J \\ Ilh mhular;. ~....Jil1lL.lIt
<br />a~ 11u\];11 ,IllJ fan pm....::"'..... Il1IL'rs...d. R..."uh.. "I grain-"I/'"
<br />anaJ~..<:~ .,ft\\t. ~al11rk.. fn'1l1 .....Clllln 2 I~\llr Ih... IIl\<."rpr.:ta-
<br />lion ..1' r....\\or~..~Il'l,lllrad\, RI\<:/ ~...dll1lL'l1I Th<.' ll11rl'rbnc.... of
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<br /> 7<;;7400
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<br /> . :~"."".".<'O_~,
<br /> 797 lBA"",,,,,,,...,...,.,,,,
<br /> D~"""~I""",,,,,,,,r
<br /> 3
<br /> 7%14'
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<br /> 79~S'I~ I
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<br />, 795
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<br /> 79J~ "
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<br />72
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<br />%
<br />
<br />175
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<br />D'stance!'omtov..'(m,
<br />
<br />Figure20,ProPorl,onsolfluv,al.aeohan.andlocally
<br />dlmvedsedlmenl.andsedlmentlorwhlchadeposi_
<br />tlOnal emmonmenl could notbe conlidentIYldet1\J.
<br />hed 10 SlrallgraphlCseclIons at Lowe' Comanche
<br />laeollanandtluvlalsedlmentmdlcaledonlywhefe
<br />confirmed by sedlmenlafyslructuresl Stfatlgraphlc
<br />section numbers are shown below the slacked.col-
<br />umn graph lor each; upper elevation (In mlof each
<br />section ,s shown above the column The vertical axis
<br />indlcales elevallon reterencedtothe NADB30999\
<br />datum tor the slfatlgraphlc SeC1Iol1S (shown aClual
<br />helghtJEleval1onsotcoloredbarsWllhmeachsec_
<br />tlolllndlcateprOporllOllollhalsedlmenll\1peonly.
<br />anddonOlrepfesentactualstral1graphlcPOSI1Iollof
<br />Ind,vldualhOfllonSwrThlnthatsecllOIl
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