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FROM: Darden Hood, Director (mailto:mailto:[email protected])

(This is a copy of the letter being mailed. Invoices/receipts follow only by mail.)

June 14, 2007

Mr. Federico Freytes Rodriguez

P.O. Box 3121

La Paraguera

Lajas 00667, Puerto Rico

RE: Radiocarbon Dating Results For Samples Tesorodorado 1, Tesorodorado 2, Tesorodorado 3

Dear Mr. Rodriguez:

Enclosed are the radiocarbon dating results for three samples recently sent to us. They each

provided plenty of carbon for accurate measurements and all the analyses proceeded normally. The report

sheet contains the dating result, method used, material type, applied pretreatment and two-sigma calendar

calibration result (where applicable) for each sample.

This report has been both mailed and sent electronically, along with a separate publication quality

calendar calibration page. This is useful for incorporating directly into your reports. It is also digitallyavailable in Windows metafile (.wmf) format upon request. Calibrations are calculated using the newest

(1998) calibration database. References are quoted on the bottom of each calibration page. Multiple

probability ranges may appear in some cases, due to short-term variations in the atmospheric 14C

contents at certain time periods. Examining the calibration graphs will help you understand this

phenomenon. Calibrations may not be included with all analyses. The upper limit is about 20,000 years,the lower limit is about 250 years and some material types are not suitable for calibration (e.g. water).

We analyzed these samples on a sole priority basis. No students or intern researchers who would

necessarily be distracted with other obligations and priorities were used in the analyses. We analyzed

them with the combined attention of our entire professional staff.

Information pages are enclosed with the mailed copy of this report. They should answer most of

questions you may have. If they do not, or if you have specific questions about the analyses, please do

not hesitate to contact us. Someone is always available to answer your questions.

The cost of the analysis was charged to the VISA card provided. A receipt is enclosed. Thank

you. As always, if you have any questions or would like to discuss the results, dont hesitate to contactme.

Sincerely,
mailto:[email protected]:[email protected]


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Mr. Federico Freytes Rodriguez Report Date: 6/14/2007

Material Received: 5/15/2007

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

Beta - 230682 230 +/- 40 BP -27.2 o/oo 190 +/- 40 BP

SAMPLE : Tesorodorado 1ANALYSIS : AMS-Standard delivery

MATERIAL/PRETREATMENT : (charred material): acid/alkali/acid

2 SIGMA CALIBRATION : Cal AD 1650 to 1700 (Cal BP 300 to 250) AND Cal AD 1720 to 1820 (Cal BP 230 to 130)

Cal AD 1840 to 1880 (Cal BP 110 to 70) AND Cal AD 1920 to 1950 (Cal BP 40 to 0)____________________________________________________________________________________

Beta - 230683 580 +/- 40 BP -25.8 o/oo 570 +/- 40 BP



2 SIGMA CALIBRATION : Cal AD 1300 to 1430 (Cal BP 650 to 520)____________________________________________________________________________________

Beta - 230684 520 +/- 40 BP -25.2 o/oo 520 +/- 40 BP



2 SIGMA CALIBRATION : Cal AD 1320 to 1350 (Cal BP 630 to 600) AND Cal AD 1390 to 1440 (Cal BP 560 to 510)____________________________________________________________________________________


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C ALIB RATION OF RAD IOC ARBON AGE TO CALENDAR YEARS

(Varia bles : C 13/C1 2=-27 .2:lab. m u lt= 1)

L a b or ato r y nu m b e r: B eta-2 30 68 2

C on v en t ion a l ra d io c ar b o n ag e : 1 9 0 4 0 B P

2 S ig ma cal ibra ted resu lts:

(95% prob abi li ty)

C al AD 1650 to 1700 (C al BP 300 to 250) an d

C al AD 1720 to 1820 (C al BP 230 to 130) an dC al AD 1840 to 1880 (C al BP 110 to 70) and

C al AD 1920 to 1950 (Cal BP 40 to 0 )

Intercep t data

Intercepts of radiocarbo n ag e

w it h c a l ib r at io n cu rve : C a l AD 1 6 70 (C a l B P 2 8 0 ) andCal AD 1780 (Cal BP 170) and

Cal AD 1800 (Cal BP 150) andCal AD 1950 (Cal BP 0 ) and

C a l AD 19 5 0 (C a l B P 0 )

1 S ig m a calibrated re su lts:(68% probabili ty)

Cal AD 1660 to 1680 (C al BP 290 to 2 70) andCal AD 1740 to 1810 (C al BP 210 to 1 40) and

Cal AD 1930 to 1950 (C al BP 20 to 0)

4985 S.W. 74th Cour t, Miam i, Florida 33155 T el: (30 5)667-5167 Fax: (305)663-0964 E-Mail : bet [email protected] om

B eta Analytic Ra dioca rbo n D ating Labora tory

Ta lma , A. S. , Vogel , J . C. , 19 93 , Rad iocarbon 35 (2) , p31 7-3 22

A Sim plified A pproa ch to Ca librating C14 D a tes

Mathemat ics

IntC al04 : Calibration Issue of R adiocarbo n (Volu me 4 6, n r 3, 200 4).

IN TC AL0 4 Radiocarbon A ge Cal ib ra t io n

Cal ib ra t io n D a ta base

INTC AL0 4

Da t ab ase u sed

References:

Radiocarbonage(BP)

4 0

6 0

8 0

1 00

1 20

1 40

1 60

1 80

2 00

2 20

2 40

2 60

2 80

3 00

Charred material3 20

Cal AD

1 550 16 00 165 0 170 0 1 750 18 00 185 0 190 0 1 950 200

1 90 40 BP


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2 Sigma cal ibra ted resu lt:


C al AD 1300 to 1430 (C al BP 650 to 520)

Intercep t data

Intercept of radioca rb on agew it h c al ib r at io n cu r ve : C a l A D 1 4 00 ( C a l B P 5 5 0 )

1 S ig m a calibrated re su lts:(68% probabili ty)

Cal AD 1320 to 1350 (C al BP 630 to 6 00) andCal AD 1390 to 1420 (Cal BP 560 to 5 40)





Mathemat ics




INTC AL0 4

Da t ab ase u sed

References:

Radio

carbonage(BP)

4 20

4 40

4 60

4 80

5 00

5 20

5 40

5 60

5 80

6 00

6 20

6 40

6 60

6 80

Charred material

7 00

Cal AD

1 260 12 80 130 0 1 320 134 0 1360 13 80 140 0 1420 144

5 70 40 BP


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2 S ig ma cal ibra ted resu lts:


C al AD 1320 to 1350 (C al BP 630 to 600) an d

C al AD 1390 to 1440 (C al BP 560 to 510)

Intercep t data

Intercept of radioca rb on agew it h c al ib r at io n cu r ve : C a l A D 1 4 20 ( C a l B P 5 3 0 )

1 Sig m a cal ibrated resu lt :(68% probabili ty)

Cal AD 1400 to 1430 (Cal BP 550 to 5 20)





Mathemat ics




INTC AL0 4

Da t ab ase u sed

References:

Radio

carbonage(BP)

3 80

4 00

4 20

4 40

4 60

4 80

5 00

5 20

5 40

5 60

5 80

6 00

6 20

6 40

Charred material

6 60

Cal AD

1 310 1 320 13 30 13 40 135 0 136 0 137 0 1380 1 390 1 400 14 10 14 20 143 0 144 0 145

5 20 40 BP

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