Report of Radiocarbon Dating Analyses

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Material Information

Title:
Report of Radiocarbon Dating Analyses
Series Title:
Archaeological Files of 39 Magnolia Avenue Site
Physical Description:
Mixed Material
Language:
English
Publisher:
City of St. Augustine, Florida
Physical Location:
Folder: Carbon Dating Documents

Subjects

Subjects / Keywords:
Saint Augustine (Fla.)
39 Magnolia Avenue (Saint Augustine, Fla.)
39 Magnolia Avenue Site (Saint Augustine, Fla.)

Notes

General Note:
BDAC # 04-0271

Record Information

Source Institution:
University of Florida
Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
BH-L2-L6
System ID:
USACH00597:00004


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R A T R an 663096



REPORT OF RADIOCARBON DATING ANALYSES
Dr. Carl Halbirt Report Date: 5/26/2006

City of St. Augustine Material Received: 5/1/2006



Sample Data Measured 13C/12C Conventional
Radiocarbon Age Ratio Radiocarbon Age(*)


Beta 216623 680 +/- 40 BP -0.1 0/00 1090 +/- 40 BP SAMPLE : 39MAGFS4.112
ANALYSIS : Radiometric-Standard delivery
MATERIAL/PRETREATMENT : (shell): acid etch
2 SIGMA CALIBRATION : Cal AD 1250 to 1340 (Cal BP 700 to 610)


Beta 216624 910 +/- 40 BP -0.7 o/oo 1310 +/- 40 BP SAMPLE: 39MAGFS6.07
ANALYSIS : Radiometric-Standard delivery
MATERIAL/PRETREATMENT: (shell): acid etch
2 SIGMA CALIBRATION : Cal AD 1020 to 1190 (Cal BP 930 to 760)































Dates are reported as RCYBP (radiocarbon years before present, Measured C13/C12 ratios were calculated relative to the PDB-1 "present" = 1950A.D.). By International convention, the modern international standard and the RCYBP ages were normalized to reference standard was 95% of the C14 content of the National -25 per mil. If the ratio and age are accompanied by an (*), then the Bureau of Standards' Oxalic Acid & calculated using the Libby C14 C13/C12 value was estimated, based on values typical of the half life (5568 years). Quoted errors represent 1 standard deviation material type. The quoted results are NOT calibrated to calendar statistics (68% probability) & are based on combined measurements years. Calibration to calendar years should be calculated using
of the sample, background, and modern reference standards. the Conventional C14 age.









CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS
(Variables: Cl3/C2-0:1)elR00Glbres-200o500:b.mull1) (Vaiable C3/C12 0 :DelR00Glob res 200to500:labmult1) (Vaables1 C13/C12-0.:D l-R00:lob rs-200(o500:ab.mull-1)
Labrat o numbr: Beta-216623 Laboratoy numbr: Beta-216623 Laboratoy number: Ba 216623
Conventional radicabn age: 109040 BP Conennal radiocarbon age: 109040 B C 0Conventional radiocarbon ago: 109040 BP
(local reservoir correction not applied) (local reservoir corretion not applied) (local reservoir correction not applied)
2Sig.. -1--rtdru -.1t: CalAD12500o1340(CalBP70006100) 2Sig elibtdeut: ClAD1250 tn1340(CBP0t70ll610 ) 2SigeibledrII: ClAD 12501o1340(C1lBP7000610)
(95% probhabili) (95% probability) (95% pubabiliy)
Intlercepitdam Intcrceptdata Intercept dam Interceptofradiocarbon age Intercept ofrdicarbonage Interpof radiocarbon age
with calibraon c-rve: Cal AD 1300 (Cal BP 650) with calibration curve: Cal AD 1300 (Cal BP 650) with calibration curve: Cal AD 1300 (Cal BP 650)
I Sigma calibrated result: Cal AD 1280 to 1320 (Cal BP 670 10630) I Sigma calibrated result: Cal AD 1280 to 1320 (Cal BP 670 to630) 1 Sigma calibrated sult: Cal AD 1280 to 1320 (CA BP 670 to 630)
(68% probability) (68% probability) (68% probabitty)
et 40 P(10ea alustic sadiocarbon Dtn Lbeor 1t eta BPAl0nay R a t btusteb a sht aB 1i0 ea nlP R0adoabooain aortl









so -- o .










Refercances Referenceas Refreencesed








Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory









CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS

(Variables: C13/C2=-0 7:Dclm-R=-00:Glob res=2001o0000:b ult=1) (Variables: Cl31Cl2=-0 7:)elt-R= 0:Glob ro=-200 to500:1abmult I) (Varables C3/CI2=- 07:Del -R=0-:Globres=-200 to00:lb mull
Laboratonumeor: Beto-216624 Laboratoln umher: Rd- 216624 Laborator number: Ba-216624
Conventnal radiocarbon age: 1310=40 BP Conventnl mdinarbon age: 131040 RI Conventinal radiocarbon ae: 131040 BP
(local uservoir correction not applied) (local -scrvoir correction not applied) (loal r-ervoir correction not applied) 2Sigoaclbrtod rault: CI AD 1020 to2l20(Ca BP 930 a6o) 2Sig. ealibrated rsult: Cal AD 020to9 01)(ClT P 930 o760) 2SigmaA lITbOdOeUlt: CalAD1020tol190(CO P 930to760)
(95% pbabili) (95% probabiliy) (95% probabili,)
Intercept dam Intmeptdam Inercep dam Intercept of radiocabon age Inlerpl ofradicarbon age latcrptof radiocbon age
ith calbrato cure: Cal AD 1070 (Cal BP 880) ith calibration ure: Ca AD 1070 (Cal BP 880) withaibraion curve: C AD 1070 (Cal BP 880)
i Sigma calibrated rsult: Ca AD 1040 to 1160 (Cal BP 910 to 790) 1 Sigma calibraed lsult: Cal AD 1040 o60 (C BP 910790) Sigma alite r CA AD 1040 to 1160 (Cal BP 910 to790)
(68% probabihty) (68% probably) (68% probability)
























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Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory















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Final Repor Final Report Final Report The fna report package includes the final date repot, a statement outlning our ana ytical The final repon packge includes the na date report a statement outlning our analytical The final repo package includes the final date report a statement outlning our analytical
procedures a glossay of pretreatment terms, lendar calibration information. biing documents procedures a glossary of pretreatment terms calendar calibration information bing documents procedures a glossay of pretreatment tens, calendar calbration information biing documents (containing balance/credit information and the number of samples submitted within the yearly (containing balan/credit information and the number of samples submtted within the yearly (containing balancecredit information and the number of samples submtted within the yearly discount period), and perpheral tems to use with future submIdals The fnal report includes the discount period) and perpheral iems to use with future submit The fna report incudes the disunt period) and perpheral teams to use with future submttals The fina report includes the I"didua anaysis metthohe deiery bass, the material type and the individual pretreatments Indvidual analysis method, the delivery bas the mater type and the individual pretreatments ndvidua analysis method, the delivery basis the matter ype and the individual pretreatment
applied The final report has been sent by mai and e-mal (where available) appled The final report has been sent by mai and emal (where available) appled The final repot has been sent by mai and e-mal (where available)

Pretreatment Pretreatment Pretreatment

Pretreatment methods are reported along with each resut. All necessary chemcal and Pretreatment methods are reported along with each result All necessa chemical and Pretreatment methods are reported along with each resut All necessary chemical and
mechanica pretreatments of the submitted material were appled at the labrato to soate the mechanical pretreatments of the submitted material were appled at the aboratoy to isoate the mechanica pretreatments of the submitted material were appled at the laboratory to isoate the carbon which may best represent the time event of interest When interpting the resuts it s carbon whch may best represent the time event of interest When interpreting the results it s carbon whch may best represent the time event of interest When interpreing the results it is imponant to insider the pretreatment Some samples cannot be fully pretreated making ther 1C impotnt to nsider the pretreatments Some sampes cannot be fully pretreated making their 14C important to consder the pretreatments Some samples annot be fully pretreated making their 1C ages more subjective than samples which can be fully pretreated Some materials receive no ages more subjective than samples which can be fully pretreated Some maerals receive no ages more subjective than sampes which can be fully pretreated Some materials receive no pretreatmens Please look at the pret reatmen ndcated for each sampe and read the pretreatment pretreaments Pease look at the prereatmen ndted for each ampe and read he pretreatment pretreatment Pease look at the prereatment ndted for each sampe and read the pretrea-ment
glossary to understand the impications glossary to understand the impicatons glossary to understand the impliations

Analysis Analysis Analysis

Materials measured by the radiometric technique were analyzed by synthesizing sample Materials measured by the radiometric technique were ana lyed by synthesizing sample Materials measured by the radiometric technique were analyzed by synthesizing ample
carbon to benzene (92% C). measuring for IC ntent in one of 53 scintil ation spectrometer, and carbon to benzene (92% C), measuring for Ct content in one of 53 scintilation spectrometer and carbon to benzene (92% C), measuring for 1C content in one of 53 scintilation spectromeers and then calculating fr radiocarbon age If the Extended Counting Seice was used, the 1C content then calculating for radiocarbon age If the Extended Counting Service was used the C content then calculating for radiocarbon age If the Extended Counting Seice was used the th content wasmeasured for a grealy extended perod of time AMS results were derved fm reduction of wa measured for a greatly extended perod of time AMS results were derved from reduction of was measured for a greatly extended perod of timeAMS results were derved from reductn of sampe caon to graphite (100% C), along wth standards and background The graphte was then sample can to graphite (00% C), along wth standards and backgrounds The graphte was then ampe carbon to graphite (100% C), along with standards and backgrounds The graphite was then
detected for 1C content in one of 9 accelerator-mass-specrometers (AMS) detected for 1C content in one of 9 acce erator-mass-spectrometers (MS) detected for 14C content in one of 9 acceleratormass spectromete (AMS)

The Radiocarbon Age and Calendar Calibration The Radiocarbon Age and Calendar Calibration The Radiocarbon Age and Calendar Calibration

The Conventiona 1 C Age (*) is the result ater applyng 1C/12C corrections to the The Conentional 1C Age (*) is the resut after applyng 1/12C corrections to the The Conventona 1C Age (*)' i the result afer applyng C/12C corre tins to the
measured age and is the most appropriate radiocarbon age If an "' s attached to this date it measured age and is the most appropriate radocarbon age If an is attached to this date, i measured age and is the most appropriate radocarbon age If an is attached to this date it means the CC was estimated rather than measured (The ratio pi an option for radiometrc means the 3CC was estimated rather than measured (The ratio is an option for radiometrc means the C12C was estimated rather than measured The ratio s an option for radiometrc anaysis but ncuded on a AMS analyses)Ages are reported wth the unt 'BP (Before Present). anaysi but included on a lMS anayses) Ages are reported wth the unts'P' (Befre Present anaysis but ncuded on a AMS analyses) Ages are repoed wth the un 'BP' (Before Present)
Present is deined as AD 1950 for the purposes of radio-rbon dating Present' is defined as AD 1950 for the purposes of radiocarbon datng. Present is defined as AD 1950 for the purposes of radiocarbon dating.
Results for samples ntaining more C than the modern reference standard are reported as Results for samples containing mor 14C than the modern reference standard are reported as Results for samples ntaining more 1C than the modern reference standard are reponed as
percent modern carbon (pMC) These results indcae the material was respirng carbon after the percent modern carbon (pMC) These reutr indicate the materIal was resprng carbon after the percent modern carbon (pMC) These results indcate the material was resprng carbon after the
advent of themo-nuclear weapons testing (and is less than 50 years old) advent of thermo nucear weapons testing and is less than 5 yea r old) advent of thermo-nuclear weapons testing (and is ess than 50 years old)
Applicable calendar cai brations are included for materials between about 100 and 19 000 Applicable calendar calbrations are included for materials between about 100 and 19,000 Applicable calendar caibrations are included for materials between about 100 and 19 000
P f ibrations are not ncuded wth a report those results were either too young, too old or B If ibrations are not ncuded with a repot those results were ethero ng too old, or ibrations are not ncuded with a repo those results were either t oo young too old or
inappropriate for calibration Pleae read the encoed page dscusing calibration, inappropriate for calibration Please rea d the enclosed page dscussing calbraton inappropriate for calibration Please rea d the enclosed page dscussing calbrat on
















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RE:2 abi.a Dmag Rus For Suple 39MAGFS4 112, 39MAGFS6 07 RE: R0di2abon D ag Rmula For Sapla 39MAGFS 112, 39MAGFS6 07 RE Mmbon, Dang R0s For Saples 3-9MAF. 112, 39MAGFS6 07

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Dr CHl Hlbi, Repon Do : 5/26/2006 Dr Cl Halbia Repo Date 5262o 6 Dr C~ hbit Repon Date 5/26/20 Cily of St Aougone Mate4 R4 vd: 1 /I/5200 Ci" ofSt A0ugae M5la/0 I0Rafd: 5A,2000 Ci ofSt Augtie MaSta.o Reeboed 5112006 SO pleData Meled 13/12C Convenlowl Sn0ploData Measur0d 10/12 Covm tomla SnpleDab M troml 13/12C Convnonal ladooxw nAge aoo Ndi0arbonAge() 1h 1an0Age Rao Ndiwon AgoC) Odior bonAge Natio adoebon* Age()


- ,39 F41 60+/-4BP lloo 0000 0+/- E0 2102 4 680So 40BP -looo 10 40+/ 4BP 0i0 3 3 402 n+/ BP -olooo 10 +/-Bp S0I 0 0oN- : C icADI0 B otol 2 A N 21 3(CBP0o0M610) S0C RN0 C iO11 (calBPo0 tol0) SMPL IP9 GF 60d S:: m F 07 2SIOCA2BRhAlON cD100 4o01120 (0B0oa ) 2Sli=cIBPnI0 C0 0 0 B 930to70) 0206CA(00N CU/l00 o110 cl1P aBPo0to070)









CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS

(Valales: C l3/C12=-0:Delo-R=D O:Glob t-200 S00:lb. multl) (Va-bles: C 3/Cl2-01 :Dcl-R=00.Glob na200to500:lab mult=l) (Vaables: CI3/CL2=-O:Delm-R-0 O:Glob =2O00to500:lb mult-1)
Laboratoynumbr: Bea-216623 Lboratooy number: Ban-16613 Laboratoynumbr: Bta-216623
Convmlonal radiocarbon age: 109040 BP Conventlnol radiocarbonage: 109040 BP Coonvtiono l radiocarbon ge: 1090-40 BP
locall user corrndon not applia) (local rrvoir corrcdion not applied) (local oser voir cootoon not applid)
2 Sigma lted lt: Cl AD 1250 to13401(Cl BP 700to610) 2Sigm rad lt CalAD 1250t 40(CalP 70to610) o Sb, 2 SigIma oolrated rdult: Cal AD 1250to 340(CI BP 700to610)
(95% pobobiloly) (95% pobobiliy) (95% ability)
In epIpda- omepdam aneptdam tropt ofradioobon ag Lot rptosraliootbon g Intrtptto f radiocfbo n tgE
wiboibrotoo0rv:e COMAa300 (Cal BP0650) withAibioi orv CA AD 1300(CiBP 650) ithoalibion re CA AD1300(Ca BP650)
1 Sigma lbmt- It Co AD 1280 to 1320 (C BP 670 o 630) 1 Sia( oIibrtod .sult Cal AD 1280 1320 (CM BP 670 to 630) 1 Sigma iib sutd CA AD 12 0 lt 1320 (CO BP 670 to 630)
(t% pobobi4%i) (00% poobiy) Otto otbo )












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Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory









CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS CALIBRATION OF RADIOCARBON AGE TO CALENDAR YEARS
(Vanales: C13/C12=-0 7:Dela-R=00:G lob s=-200o 500:Lb mlt=1) (Vaables C 13C12=-0 7:Del-R=000:Glob .s200 to 00:lab .mul=1) (Vaale: C 3/C12=-0 7:D0lm-R=010:lob s-200 to 500:k1b multI)
LabOray 2numb0r: Bet-216624 Laboratoy numbr: Bea-216624 Laraoryn mbr: Bea-216624
Convtional radioarbon age: 131040 P Conati radiorbon e: 1310040 BP Convtion radiocarbon age: 1310D40 BP
(lood servoir correcton not applied) (local servoir corr on not applied) (local sertvoir correctin not applied)
2 Sigma albratd r0ult: Cl AD 1020 to 1190(Cal BP 930to 760) 2 Sigma caloraed rult: Cal AD 1020 to 1190(Cal BP 930 00760) 2 Sigma calbrad r ult: Cl AD 1020 to 1190(Cal BP 930to760)
(95% pmbabiliy) (95% pubability) (95% probability)
In meptda- Intmept data 0(rPeptdam

witer ibro 2bi2 re Ca AD 1070 (Cal BP 880) ite bew iooi2r2 e CA ADl 070(Cal BP880) intrlibti@0 r0e: C 0DI 070 (CalBP 880)
I sgma S libtEd suit Ca AD 1040 1160 (C BP 910 to 790) 1 Sigama alibmted sut C AD 1040 to 1160 (Ca BP 910 to 790) 1 Sigma libmtd rult C AD 1040 to 1160 (Ca BP 910 to 790)
(68% probabi0ty) (68% probabibty) (68% probabity)































Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory Beta Analytic Radiocarbon Dating Laboratory









Feature 14, north I/2 Fature 14, north 1/2 Fture 14, north 1/2 Level 5 (35-50 cm BD) Level 5 (35-50 cm BD) Levdel 5 (3550 m D) FS 607 FS. 607 FS 607

Comments: Conuetraton of hell (primadly oyster ath ame quahog and reor clams Comments: Conetoraton ofshell (pmatily oysteh wth me quahog and sor clams Comments. Constration of shell (pmaily oyster th some quahog and raror clams and limitedsallop and musel) in adar dy-loa i: orgae ally ch Feature 14 ad emited allop and mussel) in a dkandy-loam soil. orgaioly rich Fature 14 and limited scallop and musel)inadarady-lo] soi: orgaeallyrick Feare 14 appears to e a trash pi as no evident of bumng has yet been exposed along ether the appeas to bea pit a no evide of buying has yet en exposed long either the spes to o h a pit Mae eidee of buying ha yet beenexpoed alone iththe base or walls of hebe pit The fater is mbirl mesu ng approximately 80 cm e a or alo fthe pit The feature is sutbirlia mte ing approximately 80 tm in a or walls ofthe p The feate is ab irlt mea ng approximately 80 em in diameter his level coespods to reu aatiest, a the pit wtains a low diameter This level rrespondsto reus aivtites, as le pit contains a lower diameter This level eorespods to rehs activities, a the pit entas a lower sratigraphh deposit whose fnotnion is unkno at this time stratiiapc deposit whose function is unknon at this time stratig aphi deposit whose hfnton is unknown at this time

Sheu mples tHted using pli/s (no diect ntat th h s) ed immediately Shell mples colleed using pliers (no diet man wiMth hads) and immediately Shell samples tollMed usin pliers (no dirt ontact ith hands) and immediately ,apped in aluinum foil. rappedinaluminum foil wrappd in aluminum foil

Except tbr some rots, thee is no evident for omaminattion of Fea i4 Ovelying Except for some roots, there is no evidena for ntrainaton of Feature 14 Overlying Except for some rots, there is no eviden for mtaination of Fea re 14 Overlying the pit was a etn ne of amli sands, wheh was ubsequsntly sealed by a dent shell the ph we athin tone of aeolian sands whch w at bsauently seated by a dens shell the pit was a thn eone ofaeolian sacd which we subsequently sealed by a dense shell middendeposit ~gagoml 8 to 32 a BD Consequntly, mteal reoveredfrom middendepoitts gihfrom 18to32cmBD Consquently,atteaalreveredfrom middendepositrangigfrom 18to32 cmBD Corsquently, mtedial rs overedfom Feate e I4 yrep ts well-saled deposns Feature I represents well sled deposits Feaure 14 tepre s well-sealed deposits






Featwe 10, noth Feature 1, north' Feture 10 north V level ( 0c me BD) Level 9 (80-i emBD) Level 9 80-I m BD) t S 4 12 F S 412 FS 412

Contents: Corntaion of shell nmaly oyster wth ome quahog and limited Coments: Contentraon of shell primlyy oyster wi some quahog and limited Comments: Conenlation of shell primlyy oyster th sme quahog and limited amounts of r mussel, and sallop) in a dak ady-lom oreanica dly ich amoltts ofr dool mussel, and scallop) in a dark sandylose orga ti ly erih amounts of ra clam mussel, and scallop) in a dark andy-los: organeialy rith Fete 10 is a mastig based on the preaet of harcoa and fire- ddened lo il along 1ae l0 issatratig pit 1-n ,1th p of hotle fir eddeedsodao Ftue 1. i aroatin pit oasedo thp ofharontd ddeed l the ahsand walls ofhe pit The feare i -irula meas g approximately 80 cm tho bae ndwalloe f t Thefreis a cirte me g appoxmae tey eba n dwalsofethhep Thefte a eis ittt ar eam snag approximately 80 indiaeter Twodinct shellsaareevident ed eppatedbyathinbdof indieter Twdite Tao tintshllstra evide andsepratedbyatnbdof indiae Teditintshellstrat ee denteandoe atedbya nbandof rdepositd browns ad The shell plea we taken from the lo eel neathe redeposited bromwnad Thshe ahll mpl wee taken ftom the t leeve n e the redeposited brown t nd The shell mpl were taken from the low level n athe burnt .il deposis burnt ceil depots burnt b il deposits

Shell samples colleted using pliers (m diet ntao t with hands) ad immediately Shell stples wllected using pliers (m dca nMet with hands) and immediately Shell samples lleed using pliers (no direct ontact with hands) and immediately wrapped in ahinum foil wrapped in aluminum foil wrapped in aluminum foil

Thereis~ e videseofrtesoote aion thnpt Athlckdepositof shell(circ Theisoevidteofrotsorntmationwithtpit Athidepositofshell(cirto The~esnocide ofroosor nta atowiithinp. Athiddepostof shell(ir 60 to 79 m BD) ad bee dsoded into e depression absqotuently abng the lowes 60 to 79 m BD) had en discded into the depression ob ently ahing the lower 60 lo 79 a BaD) had been discaded into the depresion Ibseuetly saling the lowa level. Oeethismiddledeposit weamidderne of shsell(cia 35-60 OBD), level Overthismiddledeposit wasa ddenoneofushshell(cra 35-h0 mBD), level Ovadthsmiddledeposit wsaiddenz toneof cmsh shell(cir) 3560 m BD), which apple cs to have been tapled Atifacts reverd t m ths upper one ae the which app s to have been trampled Atffets removed fom rth upper loe p the wh appeal to have been sampled Aifat s reoa ed from his upper ne e the see tasb tertehedr om i to hmF.at eO Themateas o bmihdttdfaorlysis sam l thera t e edfrom w thin patu e 0 Thmateial bmited fora ysis a eese hore aedfromwl nFeatrel0 Thematlaal bmiittedford a ysis fom Ftrea I0 has ben sealed from Feature 0 h baen tsaled from Feature 10 has been sealed




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