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North American Continent-Ocean pesetting files. n accidentally i Transects Program ye nal te be not from the origic errors may hav CommissionB oona rPUdh .oySns. i GcEaaelro Stdhcy iSnecanimceeniscc,se M sC aaontmhde mRmietatsteoiecusr,c aensd Resources book, graphi National Research Council er po py pae t he original d, and som m tne oai ed fre ret creatnot b L files er, can Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p NATIWOaNsAhiLng AtoCnA, DD.ECM. 1Y9 8P9RESS oe ue te th ii are trse us ks ea NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose mem- aPl bers are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. bred. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance. pesetting files. Page n accidentally inserte osetahinnrsegdgt ai icntnnheTTTgeiaczhhh erhoaeiertnfsite ni NNirmorcg egnaaae pttrr lmoii oeaoomfsnrbnn tetoa eaaeahturlldrtas tec AAs strho tosccba,f . aa ni edtDtddedh ebeenirednym.m i rNgc Fetyya hrave taeootienine ffdogCkw nSEi tonePaocnnedl irg getee Ahibrnrsnseeycsce. s a efieasIdusstr i ergipiintnmssrhr g o 1eeaay us8r wu pipao6tdarn of3oeis cnv,Snt eoheattc hs tmeoioeterefa,fo n t Absnuthcclhoscaeiies nanesih d,npn N tete rchihdaometeet sf ii ai yanoaNtn u, ndh 1datsamah9 etltsio 6lieo Afnra4c-nsi pc,hasm aaenutlr dcraonAapcenldteoomcideotagraruydndy tat ei e hontaa mitefngnnh d Sygdcat o hc tiost ni aoropfeer cntrttEqheohicuenercee ti geisoyrsrid.eef nou sultee fshrie ceetde rt st iiif oNnsooat gnrpaai n, dtpt oighavrofoueni nis vidtgasese lhe t d thmneAh edebeec r y Imasafn cedlasb hde wteRoiemtrerluesaaylp,tfrl ea ososg r hrofeeot af nS.v Rr MgUcieneairpevgengnodi mewecnidwcee i tistni hnhn,Ct ee atoso .hsacnm euia e stm Nnhpctoiaiaietrrfttnaiiietoctleyil n fea ciaolncolfdn- ye Academy of Sciences the responsibility for advising the federal government. The National Academy of Engineering also sponsors engineer- not from the original tc errors may have be iDagtenipnivrgvcp.e e er,pRn o TTtra opootnhhbor gideeie drat rahtNeItteemnne caM s tpshtNitirfi .noatoy auWointf mtiileaesoohslse ng soiuRdtaiyfeeo le a s MnwsiAt ss eoim e catfpidha rnermci de etcthehstehi iimnedCend ei geyAoec n w xauncotlanaa af omcc dstSifa ieoe ilcrtmn snewhiate,aeya tanlr ib' ssNceonl esniopeases eruthoa gidbroerfapsyc dnnp,oh aiioies,tzln esnl aeiA sccn1cd oycood9 bua fn7 me ydrg0fda euar tgubmehrtetctsyeehysas r etNi teshooir odaienfpnn ut aeEiNg.colr n aDtanckagtthaniriiionl.oano nirSnAewnt aeaeagcllrmrena i Atdntddouogg ec er tem.baelh dseaOeye en a a.hmod nrTef c yaa ahhS lddoit,cevh vfiari ien Ssosiniedsfcnc r itpger ehtesr noetec hci sotnpeehig uds 1efn bee t9ifonldz1ei tceeds6 o.rsee a tfTcrtol hau th ghlerae eoe sg s IsvotuInohenvpscerseteni tirasritmnituteouemrter tevnte e hia tacno.ecc et hfF tbs asiMu re noounvdfeanc e,dedtd miumi eoccperniioo nnnitmnnthees .genm io t tris ufnem nose aeipwntcmoygncn ibo onisernfeidr biesstairci lnsoaii.-tc-fye per book, ypographi wScarociemit ehcnm hgcaueeinnsrme iatrinaaenlds . p atTohnlehdi ce Nvi Ceaicsto iedou cennhtacealir limA rimsci naaaeddndem, mrbienyysi p tsohetfeec rE teAivndceg ajlioyndi,een oemtrlfyiy nt ,hb gtey h i Nenb oCapttroihoou vAnniacdcliai lnRd hgeea msssee iabrevrescic chaoen mCsd o ettou ht nhethc eIei nlp .gsrtiointvuceitrpen aoml fo eMpnete,r dathitcieni ngpe ua.b gDleircn., c Fayrn aodnf tkbh oPet rshec stishe ena tnNidfia cDt iaorn.n dRa loe Anbegcriantd eMeemr. iyWn gohfite pae t Support for this project was provided by the Department of Energy, the National Science Foundation, the National Aeronautics and he original d, and som SLInpitbaercraner ayAt iodofmn Cailno Sinstgtarrnaedtsiaso rnCd, aBatnaoldoo ktgh NCe uaUrm.dSb N.e Gro .0e o8-3l9o0-g69i3-c06a40l1 8S7u7r-v5ey. m tne Copies of this report are available from: oai U.S. Geodynamics Committee created frnot be ret N2W1aa0tsi1oh nCinaogln tRostneis,t ueDatiCrocn h2 A0C4vo1eu8nnuceil, NW L files er, can AS0d6d3itional copies are for sale from: National Academy Press 2101 Constitution Avenue, NW Washington, DC 20418 Mv m Xowe Printed in the United States of America oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th iii are trse us ks ea IN MEMORIAM aPl bred. Page nserte Edward A. Flinn s. y i (1931-1989) pesetting filen accidentall oLfi tthhoeFs Iprnohtmeerr e-1U 9P8nro0iog ntro aC m1o9 m(8I6Lm,P iEs)s.diwona rodn Ath. eF Lliinthno sseprhveerde wwihthic hd ewdiacsa etisotanb alinsdh eedf fteoc tdievveenleosps aans dt hoev efirrssete s tehcer eItnatreyr-ngaetinoenraall ye nal te be During this period, he was an ex officio member of the U.S. Geodynamics Committee. Thereafter, as Vice- m the origis may hav Chairman of Working Group I and Past Secretary-General, he served as one of the USGC-ILP reporters. not froc error book, graphi er po py pae t he original d, and som m tne oai ed fre ret creatnot b L files er, can Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th iv are trse us ks ea aPl bred. Page nserte s. y i pesetting filen accidentall ye nal te be m the origis may hav not froc error book, graphi er po py pae t he original d, and som m tne oai ed fre ret creatnot b L files er, can Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th v are trse us ks ea bread. Pl U.S. GEODYNAMICS COMMITTEE Page nserte Frank M. Richter, University of Chicago, Chairman pesetting files. n accidentally i DBWDroaiavlndliaifdalod mLr dJ .J . J H.D oH.ne HiePnsaaz,go eUel,o rnP,,i uMvUrednaruissviestea yUrc sohnitfuiy vsC eeoartftsl siiCf tIoyanrlsniftiioatru, ntBeiae o,r kfB eTelreekcyehlneoylogy ye Robert A. Phinney, Princeton University nal te be Leigh H. Royden, Massachusetts Institute of Technology m the origis may hav SPRieogtbem rV uRna.nd V dSaenirle ,Vl sRooinoc,e, SUUhnneiilvvle eOrrssiilit tyCy oomf Mpainchyigan not froc error E-an Zen, U.S. Geological Survey book, graphi Ex officio: er po py Albert W. Bally (Bureau Member, Inter-Union Commission on the Lithosphere) pae t he original d, and som SPetamffbroke J. Hart om taine The following were members of the U.S. Geodynamics Committee during the period of the North American ed fre ret Continent-Ocean Transects Program: creatnot b JWohilnli aCm. MCa. xKweelllyl (Chairman, 1978-1983) L files er, can JCaacrkl KE.i sOslliinvgeer r(Chairman, 1984-1987) Mv m Xowe Don L. Anderson oh David L. MacKenzie d frng, Albert W. Bally posematti Marcia K. McNutt mor Hubert L. Barnes coc f J. Casey Moore n reecifi Mark D. Barton ep ork has beesetting-sution. WANreitilhll iuDarm .L O .R pB.d Moyekutetechhlebrerger nal wer typattrib BI. rSueclew Ayn. BSoalctks his new digital representation of the origihs, word breaks, heading styles, and othublication as the authoritative version for FDRHBGAREMArd.ooeradaaa twCorvlbanhratrmiyimlcuandnga irrdL ersud MWBk R ot vRA Ar u..ABo.e . . DG. Snt Zu. BTt F czrrSoHohechlipbiyeoehuoneawdnmfelntcilnzoe kp(lelnesesoxrkn oi f(feixci oof)ficio) About this PDF file: Tthe original; line lengtprint version of this p oe ue te th vi are trse us ks ea bread. Pl BOARD ON EARTH SCIENCES AND RESOURCES Page nserte William L. Fisher, University of Texas, Austin, Co-Chairman pesetting files. n accidentally i BSKAarelimbiaienturi et JA lW. SkS.i.k , B AiUnadnnlaleiymvr,,e sRrY,s iCiactlyeoe l UooUfrn naSiidvvooeeu rrStsshicietthyyron, o CCl oao-lfCi fMohrainnirieamsan ye James R. Baroffio, Chevron USA, Inc. nal te be Sandra L. Blackstone, University of Denver m the origis may hav DGWoo. nrGdaoaldnry JP .E .D rEneasPtto,a noS,lt oaI,on Uwfonar diSv Utearntseii tvUye nrosifiv tCeyrasliitfyornia, Berkeley not froc error RAolebxearnt dNe.r GFi.nHs.b Guroge,t zU, nUivneivrseirtsyi toyf oMf iCaomloirado book, graphi PPreirsrcyi lRla. CH.aPg.e Gnsretewin, ,M Riensnoeusroctea IGsseuoelso,g Iincca.l Survey er po py Harrison C. Jamison, Atlantic Richfield Exploration Company (retired) he original pad, and some t TCCFrhhaaoranemrkll e aOMss t JtH.e. R,.M iJJcroah.nr, tdkUeairnnn, ,o,U UcMnanilav isCveseroasrcrsiphtiytouy rso aeoftt fitCo sOn hI kin(clrsaaethgittioourmeteda )of Technology om taine J.J. Simmons III, Interstate Commerce Commission ed fre ret Steven M. Stanley, Johns Hopkins University creatnot b IRrvoibne rLt .S W. Lhoitneg, ,N Setwaf fY Doirrke cSttoarte Energy Research and Development Authority L files er, can Betty C. Guyot, Staff Associate Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th vii are trse us ks ea bread. Pl COMMISSION ON PHYSICAL SCIENCES, MATHEMATICS, AND RESOURCES Page nserte Norman Hackerman, Robert A. Welch Foundation, Chairman pesetting files. n accidentally i RBGRo.ae lCobprelhgar terJ k C.F CB.. BiCuceraecarrhrrodifneiseerl,l,e ,HUy M,an Wraivvsoaesarrodscdi htsUyu Hn soeiofvt lteCesr asOInilticsyfetoiartnunotieag ,ro Iafrp vThienicce hInnostliotugtyion ye Herbert D. Doan, The Dow Chemical Company (retired) nal te be Peter S. Eagleson, Massachusetts Institute of Technology m the origis may hav DMGeeararhnya eEr tA. FEnrnaiesedt mFlaoanxnd,, e UIrB,n BMivr,eo rTosk.iJthy. a Wovfea nTts eNoxnaa tRsioensaela Lrcahb Coreantoterry not froc error LPhawillriepn Ace. GWr.i fFfiutnhks,h Douuskeer ,U Cnhiveverrsointy Corporation (retired) book, graphi NChearils Fto. pLhaenr eF, .R MicceK Uene,i vUenrsiivteyrsity of California, Berkeley er po py Richard S. Nicholson, American Association for the Advancement of Science he original pad, and some t JJPFaehrcraieknlmi kpE i L.Aa hO.. PPlPia.va rlOekmres,e rtCr,r i,Vok Erean.rnI,e. dl Pdle rurUibn Pnicliotev ntUeotr nnsd iieUvty eNnrisevimteyrosuitrys O&b Cseormvaptaonryy om taine Denis J. Prager, MacArthur Foundation ed fre ret David M. Raup, University of Chicago creatnot b RLaoryr yF L. S. cShmwairttt,e Nrsa, tSiounpaelr cCoenndtuecr tfionrg SSuuppeerrc oCmolpliudteinr gL Aabpoprlaictoartyions L files er, can KMayrrlo Kn .F T. uUremkaiann, ,A Ycatilneg U Enxiveecrustiitvye Director Mv m Xowe Robert M. Simon, Acting Associate Executive Director oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th viii are trse us ks ea aPl bred. Page nserte s. y i pesetting filen accidentall ye nal te be m the origis may hav not froc error book, graphi er po py pae t he original d, and som m tne oai ed fre ret creatnot b L files er, can Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th PREFACE ix are trse us ks ea aPl bred. PREFACE Page nserte s. y i pesetting filen accidentall ye m the original ts may have be 1obe9che7aa9nl,TTf i chhao seelf i CtaUthh ooSsentsG utpUidCnhSyee G anroeptC-f.pO ,ot hhcineeeta epsndtr rT ouRvrcaiotdnubesredeer c tla tesCna dP.d rSePorpghsehraeaindpme rai ownsz adorseei cpivn oeeirltvotieaoprtli eunodtgfi o batnyhn etdoh fUec atSUhrGre.yS Cit.nr Gatgon e soociudtoityoo tnnrhdaaemil n priacretoseg g iCotrhaonemm bT.me rTtaiwtrntaeesneeesn c(e tUcstht S PegGr rocCogrua)r ptaeosman rw. l yaeOn rinden book, not frographic error ocporrgonagdnruaiczmte odef x ftpohare n apd resodeg rtrioea smi no cafln ucddo efro rCird aponrraesds eioannnt a tathnioed n mM aanerdxg iipcnuasbn ol cifco artthriieod noU rosnf;i tttehhdeu srS eittsa ubteletscs..a SmWpeie tach iiNfni cot wrpthola Aynesma wresre iacrfeat ned rCe ivtosen litoninpiteeiandt ti-foOonrc, etthahnee er po Transects Program. It is regarded as a contribution to the International Lithosphere Program. pape ty The resulting maps, sections, and text of the North American Continent-Ocean Transects Program are being he original d, and som preusbelaiCrschohem dw pbeayrr eits hboean Gs iocef o oltbohjgeei ccttraialv nSessoi tcoiiofe ntty hz eoo ftn rAea nmasreeocruitcsna dp a rsoth gpera arcmto o.n fAt iintcsec npotrraodlgi nrmagmalyr g,o iinnn sitt,hi aeal nD pdel acdnaednveien logof p fNomroe rtnthhte AoTfmr apenlrasineccas tnsf oGPrer oofuglotruagrmye. m tne called for a report by the USGC giving an overview of the results of the program and guidance for the future—the oai present report. ed fre ret This report on the North American Continent-Ocean Transects Program consists of two parts: Part I— ML files creatver, cannot b Oditisvs cpeurrvPespisaeiarowtr naI t aoiisonf ndtth. hRee ertecrasopnmosemncsetisbn)di.laittyio onfs ;t hPea Urt SIGI—C,N wohrtihc hA amckenriocwanle dCgoenst itnheen stu-Obscteaannti aTl rcaonnsittriiobnusti o(gne onfe Rraol baenrdt Sdpeetaeidl etdo m Xowe Part II is the responsibility of the indicated authors: Robert Speed, coordinator of the North American posed fromatting, h Cicso onbnsatosinelieddn aott-neOd bc odeatihsnc puTusrsabinloissneh coetdfs Ptahnreod g turraannmpsu,e baclntisds h s2eh3do ulmeladad tbeerresi a mol faa dtshseeo acinviadatiielvdaib dwlueia tlah st r tahpneas rtetr caotn fts eeiatcsmt srs.e . pTTohhrete UoUnSS GGthCCe dNneooctreitdshe tdhA atmth Paetra irtctha IinsI comc for Continent-Ocean Transects Program. n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p oe ue te th PREFACE x are trse us ks ea The U.S. Geodynamics Committee is pleased to acknowledge the continuing support of the the Department bread. Pl of Energy, the National Science Foundation, the National Aeronautics and Space Administration, and the U.S. Page nserte GFoeuonlodgaitcioanl Sanudrv Uey.S f.o Gr etohleo gviacraiol uSsu ravcetiyv iftoier st hoef Nthoer thco Ammmeirtitceaen, aCnodn tthinee nspt-eOccifeiacn s uTprapnosret cotsf Pthreo gNraamtio.nal Science s. y i Expansion of the original Transects Program to become a North American Continent-Ocean Transects pesetting filen accidentall PTArrmoangesrraeicmcatsn w PCaroosn jetwicnete l(ncuot-nmOdeec.re atAnh eTb Irrnaontaesdrenecrat,ts i ouPnnraofolg rrLeaismtehe.ons prheesruel t Pwroagsr atmhe) , lmauondcehliendg inin l a1rg9e8 5p aorft othne t hGe losubcacl eGssefuols cNieonrcthe ye nal te be m the origis may hav not froc error book, graphi er po py pae t he original d, and som m tne oai ed fre ret creatnot b L files er, can Mv m Xowe oh d frng, posematti mor coc f n reecifi ep es ork has besetting-ution. wpb nal er tyattri e origind othon for entation of thding styles, aoritative versi his new digital represhs, word breaks, heaublication as the auth About this PDF file: Tthe original; line lengtprint version of this p