AMS Radiocarbon Dating
PaleoResearch Institute has been working with Dr. Thomas W. Stafford Jr to develop our methods for AMS
Radiocarbon Dating. We believe we are providing the highest quality AMS dating possible. In the following list note the very small sigmas and
the small final mass dated.
Our regular price for AMS radiocarbon dating is US $595.
Standard turn-around is 30 business days. Call us at 303.277.9848 for rush service and price.
If you are considering a "Humate Date" because you have no visible charcoal- Call us, we have another choice!
Sample Submission form is here. Right click the link and select "Save Target as" to save locally.
In the table below, FM represents Fraction Modern and is used for radiocarbon determinations post-atmospheric atomic bomb (post 1950).
| Sample # |
base date |
sigma |
material |
mass |
| PRI-05-30-8 |
2515 |
15 |
Alnus charcoal |
0.0042 |
| PRI-05-30-9 |
2535 |
15 |
Alnus charcoal |
0.006 |
| PRI-05-39-A27 |
37920 |
840 |
Humate |
0.0121 |
| PRI-05-39-A32 |
8920 |
20 |
Humate |
0.0423 |
| PRI-05-39-A33 |
1325 |
15 |
Humate |
0.0233 |
| PRI-05-39-A34 |
1510 |
15 |
Humate |
0.0362 |
| PRI-05-39-A51 |
3160 |
15 |
Humate |
0.0052 |
| PRI-05-46-1 |
905 |
20 |
Sacrobatus charcoal |
0.0117 |
| PRI-05-30-4 |
155 |
15 |
Salicaceae charcoal |
0.0064 |
| PRI-04-99-30 |
1590 |
15 |
Sarcobatus charcoal |
0.0041 |
| PRI-05-48-SR1-4 |
1175 |
30 |
cf. Rosaceae Charcoal |
0.0037 |
| PRI-05-39-A31 |
3090 |
30 |
Humate |
0.0043 |
| PRI-05-48-IC1-2 |
1015 |
30 |
Pinus charcoal |
.25mg C |
| PRI-05-48-CC3-1 |
430 |
30 |
Quercus charcoal |
0.0071 |
| PRI-05-48-CC1-2 |
285 |
30 |
Salicaceae charcoal |
0.0013 |
| PRI-05-48-TC1-4 |
115 |
30 |
Salicaceae charcoal |
0.0145 |
| PRI-05-69-UR2-2PIX |
510 |
15 |
Pine cone scale charcoal |
0.4mgC |
| PRI-05-64-WRR1-2 |
195 |
15 |
Pinus charcoal |
0.028 |
| PRI-05-64-YR1-1 |
555 |
15 |
Pinus charcoal |
0.0014 |
| PRI-05-69-UR4-2 |
14860 |
35 |
Salicaceae charcoal |
0.0016 |
| PRI-05-66-77 |
1240 |
15 |
Zea mays cob |
0.0058 |
| PRI-05-66-74 |
1980 |
20 |
Artemisia charcoal |
0.0044 |
| PRI-05-87-210 |
6405 |
20 |
Betula charcoal |
0.0035 |
| PRI-05-77-P2-C1 |
4425 |
20 |
Conifer charcoal |
0.0027 |
| PRI-05-77-P8-C2.3 |
8920 |
25 |
Conifer charcoal |
0.0045 |
| PRI-05-66-561 |
1865 |
25 |
Juniperus charcoal |
0.005 |
| PRI-05-77-P4-C3 |
4435 |
20 |
Pinus charcoal |
0.0032 |
| PRI-05-77-P7-C1.5 |
7665 |
20 |
Pinus charcoal |
0.0044 |
| PRI-05-33-1 |
590 |
30 |
Quercus charcoal |
0.004 |
| PRI-06-01-5 |
180 |
20 |
Amelancheir charcoal |
0.0016 |
| PRI-05-77-P2-C2 |
3975 |
25 |
Conifer charcoal |
0.0009 |
| PRI-05-77-P4-C1.2 |
1580 |
15 |
Pinus charcoal |
0.0022 |
| PRI-05-77-P8-C1.2 |
1890 |
25 |
Pinus charcoal |
0.0016 |
| PRI-05-95-TH1-1 |
510 |
15 |
Pseudotsuga charcoal |
0.0031 |
| PRI-05-95-TH2-4 |
580 |
20 |
Pseudotsuga charcoal |
0.0024 |
| PRI-05-94-WR-1 |
220 |
20 |
Salicaceae charcoal |
0.0023 |
| PRI-04-87-417-425 |
24970 |
370 |
SOM |
0.0053 |
| PRI-05-95-SKO1-10 |
145 |
15 |
Thuja plicata wood |
0.0032 |
| PRI-05-95-SKO1-11 |
400 |
20 |
Thuja plicata wood |
0.0026 |
| PRI-04-98-201-206 |
6355 |
20 |
Uncharred organics |
0.0074 |
| PRI-04-98-424-430 |
7690 |
35 |
Uncharred organics |
.34mgC |
| PRI-04-98-498-503 |
17200 |
70 |
Uncharred organics |
0.0074 |
| PRI-05-19-101 |
6275 |
20 |
microcharcoal |
0.0007 |
| PRI-04-87-501-516 |
22090 |
90 |
SOM |
0.0069 |
| PRI-04-87-577-581 |
30630 |
210 |
SOM |
0.0037 |
| PRI-06-31-CCI1-6 |
655 |
20 |
cf. Alnus charcoal |
0.0066 |
| PRI-06-36-CWP1-5 |
145 |
15 |
Salicaceae charcoal |
0.0049 |
| PRI-06-12-1-05 |
2245 |
15 |
Charcoal |
10.0mg |
| PRI-06-54-TW1-1 |
905 |
20 |
Pinus charcoal |
0.0014 |
| PRI-06-36-BR1-1 |
1395 |
15 |
Charcoal |
3.5mg |
| PRI-06-63-CW-1-2 |
730 |
15 |
Charcoal |
1.1 mg |
| PRI-06-63-FC2-1 |
3830 |
15 |
Charcoal |
4.0 mg |
| PRI-06-63-PW1-1 |
375 |
15 |
Charcoal |
0.1 mg |
| PRI-06-63-SC3-1 |
955 |
15 |
Charcoal |
6.1mg |
| PRI-06-68-SKO5-6 |
405 |
20 |
Acer charcoal |
0.006 |
| PRI-06-63-CC3-1 |
170 |
20 |
Asteraceae charcoal |
0.0028 |
| PRI-06-80-TC1-2 |
8980 |
25 |
cf. Salicaceae charcoal |
0.0002 |
| PRI-06-68-SKO2-3 |
2220 |
20 |
Conifer charcoal |
0.0047 |
| PRI-06-68-SKO4-2 |
810 |
20 |
Peat |
0.0088 |
| PRI-06-68-SKO4-3 |
800 |
20 |
Peat |
0.0052 |
| PRI-06-63-CW2-1 |
150 |
20 |
Pinus charcoal |
0.0059 |
| PRI-06-68-SKO2-1 |
620 |
20 |
Pseudotsuga charcoal |
0.0078 |
| PRI-06-68-SKO3-2 |
490 |
20 |
Pseudotsuga charcoal |
0.0081 |
| PRI-06-63-CC2-1 |
830 |
20 |
Quercus charcoal |
0.0038 |
| PRI-06-82-88 |
5515 |
20 |
Soil microcharcoal |
0.0015 |
| PRI-06-82-95 |
8000 |
30 |
Soil microcharcoal |
0.0002 |
| PRI-06-80-GR2-5SA |
1015 |
15 |
cf Salicaceae charcoal |
0.0001 |
| PRI-06-80-GR1-3U |
70 |
15 |
Charcoal unidentified |
0.0063 |
| PRI-06-95-C-8 |
10280 |
25 |
Charred herbaceous stem |
0.0036 |
| PRI-06-80-GR2-4 |
10025 |
25 |
Microcharcoal |
0.003 |
| PRI-06-80-CC1-6PI |
740 |
15 |
Pinus charcoal |
0.0004 |
| PRI-06-80-CO1-1PI |
1895 |
20 |
Pinus charcoal |
0.0037 |
| PRI-06-80-TC1-1PI |
7955 |
20 |
Pinus charcoal |
0.0024 |
| PRI-06-80-GR1-5RH |
190 |
15 |
Rhus charcoal |
0.0036 |
| PRI-06-80-GR3-1RO |
205 |
15 |
Rosaceae charcoal |
0.0024 |
| PRI-06-80-CC1-7SA |
170 |
20 |
Salicaceae charcoal |
0.0003 |
| PRI-06-80-CE1-2SA |
1215 |
15 |
Salicaceae charcoal |
0.0018 |
| PRI-06-80-CE1-5SA |
1140 |
20 |
Salicaceae charcoal |
0.0057 |
| PRI-06-80-CO1-3SA |
640 |
15 |
Salicaceae charcoal |
0.0001 |
| PRI-06-80-CR2-4SA |
285 |
15 |
Salicaceae charcoal |
0.0001 |
| PRI-06-80-CR2-5SA |
130 |
15 |
Salicaceae charcoal |
0.0043 |
| PRI-06-80-GR4-1SA |
135 |
15 |
Salicaceae charcoal |
0.0001 |
| PRI-06-80-TC1-7PI |
9205 |
20 |
Vitrified Pinus charcoal |
0.0067 |
| PRI-06-68-SKO7-2 |
930 |
15 |
Acer charcoal |
0.0029 |
| PRI-06-68-SKO-7-4 |
2020 |
15 |
Bark - charred |
0.0003 |
| PRI-06-86-05-1510R |
3560 |
20 |
Ceramic residue |
0.0039 |
| PRI-06-80-ER1-3CO |
630 |
15 |
Conifer charcoal |
0.0029 |
| PRI-07-02-2B |
375 |
20 |
Juglans charcoal |
0.003 |
| PRI-06-80-GR2-5 |
12650 |
30 |
Microcharcoal |
0.0017 |
| PRI-06-78-KO6-C1 |
8935 |
20 |
Peat |
0.01 |
| PRI-06-78-KO6-C2 |
5930 |
20 |
Peat |
0.0087 |
| PRI-07-01-ECC1 |
1295 |
20 |
Pinus charcoal |
0.008 |
| PRI-07-06-1 |
670 |
15 |
Quercus charcoal |
0.0052 |
| PRI-06-80-LF1-2RO |
675 |
20 |
Rosaceae charcoal |
0.0004 |
| PRI-06-80-CR1-3/4SA |
850 |
15 |
Salicaceae charcoal |
0.0001 |
| PRI-06-80-CU1-1SA |
1710 |
15 |
Salicaceae charcoal |
0.0015 |
| PRI-06-80-LF1-6SA |
1125 |
15 |
Salicaceae charcoal |
0.001 |
| PRI-06-80-SC1-1/2SA |
205 |
15 |
Salicaceae charcoal |
0.0018 |
| PRI-06-80-SC2-8SA |
485 |
15 |
Salicaceae charcoal |
0.0035 |
| PRI-07-02-1 |
345 |
15 |
Zea mays cupule |
0.0038 |
| PRI-05-20-242 |
2465 |
15 |
Aesculus charcoal |
0.0091 |
| PRI-05-20-325 |
3025 |
15 |
Carya nutshell |
0.0034 |
| PRI-07-24-206 |
1670 |
15 |
Ceramic residue |
0.004 |
| PRI-07-24-433 |
2180 |
50 |
Ceramic residue |
0.0039 |
| PRI-06-89-107-110 |
10685 |
30 |
Humate |
0.0102 |
| PRI-06-89-123-125 |
14365 |
45 |
Humate |
0.0015 |
| PRI-06-89-167 |
15515 |
50 |
Humate |
0.0026 |
| PRI-06-89-187-192 |
34420 |
490 |
Humate |
0.0035 |
| PRI-06-89-210 |
33510 |
440 |
Humate |
0.0049 |
| PRI-06-89-65-68 |
4900 |
20 |
Humate |
0.007 |
| PRI-06-89-90-92 |
7240 |
25 |
Humate |
0.0092 |
| PRI-06-89-96-98 |
7775 |
20 |
Humate |
0.0052 |
| PRI-07-19-GVC1-2PI |
1305 |
15 |
Pinus charcoal |
0.0029 |
| PRI-07-19-GVC1-1PS |
195 |
15 |
Pseudotsuga charcoal |
0.0032 |
| PRI-07-33-CO5E002.001 |
2305 |
15 |
Acer glabrum charcoal |
|
| PRI-07-31-1CH |
1200 |
20 |
Acer spp. Charcoal |
|
| PRI-05-86-174 |
315 |
15 |
Atriplex charcoal |
|
| PRI-06-89-180-183 |
41870 |
780 |
Charcoal |
|
| PRI-05-86-78 |
2495 |
20 |
Ephedra charcoal |
|
| PRI-05-86-831 |
200 |
15 |
Rhus charcoal |
|
| PRI-05-86-386 |
230 |
15 |
Salicaceae charcoal |
|
| PRI-05-86-992 |
245 |
15 |
Salicaceae charcoal |
|
| PRI-07-49-48 |
1595 |
35 |
Amelancheir charcoal |
0.0036 |
| PRI-07-47-14 |
1965 |
35 |
Atriplex charcoal |
0.0045 |
| PRI-07-44-163 |
75 |
35 |
Betula twig charcoal |
0.0036 |
| PRI-06-89-18-22 |
2110 |
35 |
Humate |
0.0047 |
| PRI-07-48-1 |
1160 |
35 |
Pinus charcoal |
0.0019 |
| PRI-07-48-2 |
1540 |
35 |
Pinus charcoal |
0.0024 |
| PRI-07-49-20 |
1675 |
35 |
Populus charcoal |
0.0044 |
| PRI-07-49-24 |
1735 |
35 |
Populus charcoal |
0.0029 |
| PRI-07-49-45 |
1680 |
35 |
Populus charcoal |
0.0031 |
| PRI-07-45-2 |
2855 |
35 |
Prosopis and Unid charcoal |
0.0044 |
| PRI-07-45-1 |
1785 |
35 |
Prosopis charcoal |
0.0066 |
| PRI-07-46-15 |
2865 |
35 |
Prosopis charcoal |
0.0037 |
| PRI-07-45-139 |
5425 |
35 |
Sediment microcharcoal |
0.0026 |
| PRI-07-46-1 |
3490 |
35 |
Sediment microcharcoal |
0.0042 |
| PRI-07-46-3 |
3825 |
35 |
Sediment microcharcoal |
0.0048 |
| PRI-07-40-2973-1-2 |
1260 |
20 |
Acer negundo Charcoal |
0.0015 |
| PRI-07-57-40 .36mgC |
9615 |
45 |
Alnus charcoal |
0.0005 |
| PRI-07-56-1collagen |
1.0491FM |
0.0025 |
Bone collagen |
0.0037 |
| PRI-07-56-2 collagen |
1.1430FM |
0.0028 |
Ivory Collagen |
0.0029 |
| PRI-07-40-2977-1-1 |
865 |
20 |
Populus charcoal |
0.0019 |
| PRI-07-40-2977-1-2 |
890 |
20 |
Populus charcoal |
0.0011 |
| PRI-07-40-2977-2-1 |
1070 |
20 |
Populus charcoal |
0.0009 |
| PRI-07-57-35 |
9430 |
90 |
Soil microcharcoal |
0.0002 |
| PRI-07-58-283-3101 |
965 |
20 |
Zea mays Cob Charcoal |
0.0015 |
| PRI-07-58-433-8266 |
960 |
20 |
Zea mays Cob Charcoal |
0.0014 |
| PRI-07-58-433-9688 |
1005 |
20 |
Zea mays Cob Charcoal |
0.001 |
| PRI-07-58-356-2814 |
990 |
20 |
Zea mays Cob Charcoal |
0.0011 |
| PRI-07-58-433-9646 |
990 |
20 |
Zea mays Cob Charcoal |
0.0015 |
| PRI-07-58-509-3236 |
945 |
20 |
Zea mays Cob Charcoal |
0.0015 |
| PRI-07-58-395-4712 |
970 |
20 |
Zea mays Cob Charcoal |
0.0012 |
| PRI-07-58-433-7825 |
985 |
20 |
Zea mays Cob Charcoal |
0.0012 |
| PRI-07-64-6720-19 |
3735 |
20 |
Prosopis charcoal |
0.0024 |
| PRI-07-64-6720-32 |
1560 |
20 |
Prosopis charcoal |
0.0024 |
| PRI-07-64-6720-15 |
3700 |
25 |
Prosopis charcoal |
0.0014 |
| PRI-07-64-6773-2 |
3710 |
20 |
Prosopis charcoal |
0.0019 |
| PRI-07-64-7891-1 |
1770 |
20 |
Prosopis charcoal |
0.0033 |
| PRI-07-65-1 |
725 |
20 |
Prosopis charcoal |
0.002 |
| PRI-07-65-2 |
2740 |
20 |
Prosopis charcoal |
0.0021 |
| PRI-07-64-6773-15 |
1510 |
20 |
Soil microcharcoal |
0.0021 |
| PRI-07-20-5568-2006-01 |
6305 |
25 |
Unidentified hardwood charcoal |
0.0021 |
| PRI-07-58-433-9535 |
940 |
25 |
Zea mays Cob Charcoal |
0.0027 |
| PRI-07-87-1656-U2-3 |
3530 |
15 |
Pinus charcoal |
0.006 |
| PRI-02-81-SR1-1CO |
115 |
15 |
Conifer charcoal |
0.0022 |
| PRI-07-73-IG0-2CO |
950 |
15 |
Conifer charcoal |
0.0026 |
| PRI-07-74-SK1-3AC |
825 |
20 |
Arctostaphylos charcoal |
0.0014 |
| PRI-07-74-SK1-5AE |
1145 |
15 |
Acer charcoal |
0.0017 |
| PRI-07-81-SC1-1TH |
160 |
15 |
Thuja charcoal |
0.0020 |
| PRI-07-95-1 |
180 |
15 |
Pinus charcoal |
0.0020 |
| PRI-07-95-2 |
8760 |
20 |
Pinus charcoal |
0.0001 |
| PRI-07-96-1 |
1.1176 FM |
0.0017 |
Paper |
0.0045 |
| PRI-07-104-302-4 |
2510 |
15 |
charred walnut shell |
0.0018 |
| PRI-07-104-174-1 |
1215 |
15 |
charred squash rind |
0.0001 |
| PRI-07-86-G1.1-C3 |
680 |
20 |
Unid. Hardwood Charcoal |
0.0001 |
| PRI-07-86-G1.2-C1 |
1080 |
20 |
Juglandaceae Charcoal |
0.0011 |
| PRI-07-86-G1.2-C3 |
735 |
20 |
Unid. Hardwood Charcoal |
0.0017 |
| PRI-07-86-G1.2-C31 |
640 |
20 |
Juglandaceae Charcoal |
0.0016 |
| PRI-07-86-G1.2-C32 |
725 |
20 |
Unid. Hardwood Charcoal |
0.0017 |
| PRI-07-86-G1.2-C33 |
170 |
20 |
Meliaceae Charcoal |
0.0016 |
| PRI-07-86-G1.2-C34 |
180 |
20 |
Juglandaceae Charcoal |
0.0022 |
| PRI-07-86-G1.2-C35 |
755 |
20 |
Unid. Hardwood Charcoal |
0.0001 |
| PRI-07-86-G1.2-C36 |
140 |
20 |
Meliaceae Charcoal |
0.0020 |
| PRI-07-86-G1.6-1 |
1220 |
20 |
Fabaceae Charcoal |
0.0020 |
| PRI-07-86-G1.6-C2 |
1215 |
20 |
Fabaceae Charcoal |
0.0032 |
| PRI-07-86-GP1.2-C1 |
680 |
20 |
Unid. Hardwood Charcoal |
0.0028 |
| PRI-07-86-RB-C1 |
1260 |
20 |
Unid. Charred Fruit |
0.0010 |
| PRI-07-29-12 |
1670 |
15 |
Quercus charcoal |
0.0023 |
| PRI-07-82-T3-1 |
8775 |
20 |
microcharcoal |
0.0001 |
| PRI-07-82-T3-2 |
6555 |
25 |
microcharcoal |
0.0006 |
| PRI-07-82-T3-5 |
5200 |
20 |
microcharcoal |
0.0002 |
| PRI-07-84-1 |
220 |
15 |
microcharcoal |
0.0018 |
| PRI-07-84-2M |
1720 |
15 |
Monocot charcoal |
0.0028 |
| PRI-07-88-401 |
240 |
15 |
Residue from ceramic |
0.0024 |
| PRI-07-98-AS |
940 |
15 |
Arctostaphylos Charcoal |
0.0019 |
| PRI-07-98-AH |
810 |
15 |
Picea charcoal |
0.0020 |
| PRI-07-101-1 |
4485 |
15 |
Artemisia charcoal |
0.0018 |
| PRI-07-82-T3-5T |
4715 |
15 |
Conifer charcoal |
0.0019 |
| PRI-07-104-C48 |
3100 |
25 |
UNIDENTIFIED Charcoal |
0.0002 |
| PRI-07-104--P27 |
5130 |
90 |
UNIDENTIFIED Charcoal |
0.0001 |
| PRI-07-104-C44 |
3605 |
20 |
UNIDENTIFIED Charcoal |
0.0001 |
| PRI-07-86-L1.3W-C13 |
1480 |
80 |
UNIDENTIFIED Charcoal |
0.0001 |
| PRI-07-86-PMT1-C1 |
1575 |
15 |
UNIDENTIFIED Hardwood |
0.0022 |
| PRI-07-86-L1-C4 |
1585 |
15 |
UNIDENTIFIED Hardwood |
0.0005 |
| PRI-07-86-L1.3W-C14 |
1265 |
15 |
cf. Asteraceae |
0.0006 |
| PRI-07-86-L1.3W-C13-Bulk |
2430 |
15 |
UNIDENTIFIED Charcoal |
0.0023 |
| PRI-07-86-L1-C1 |
1.081 FM |
0.0057 |
UNIDENTIFIED Charcoal |
0.0001 |
| PRI-07-86-PMT1-C3 |
1450 |
20 |
cf. Asteraceae |
0.0001 |
| PRI-07-86-PMT1-C5 |
1485 |
15 |
UNIDENTIFIED Hardwood |
0.0022 |
| PRI-07-86-L1-C2 |
400 |
15 |
UNIDENTIFIED Hardwood |
0.0014 |
| PRI-07-115-1PI |
830 |
15 |
Picea single needle |
0.001 |
| PRI-07-118-1 |
210 |
15 |
Unid hardwood Bear mask |
0.0034 |
| PRI-07-86-PM2.2-C3 |
2165 |
25 |
UNIDENTIFIED Hardwood |
0.0001 |
| PRI-07-86-PM2.2-C |
1175 |
25 |
UNIDENTIFIED Hardwood |
0.0001 |
| PRI-07-88-L2-C8 |
1325 |
25 |
UNIDENTIFIED Charcoal |
0.0001 |
| PRI-07-86-PM2.5-C1 |
225 |
25 |
Aspidosperma-type charcoal |
0.0025 |
| PRI-07-86-L2-C9 |
2980 |
25 |
cf. Fabaceae Charcoal |
0.0024 |
| PRI-07-86-PM2-C5 |
1.0382 FM |
0.0031 |
Meliaceae Charcoal |
0.0022 |
| PRI-07-86-L2.4-C16 |
725 |
25 |
Palmae Charcoal |
0.0020 |
| PRI-07-86-PM2.6-C1 |
1.2909 FM |
0.0037 |
UNIDENTIFIED Charcoal |
0.0008 |
| PRI-07-86-PM2-C3 |
1.2041 FM |
0.0033 |
Meliaceae Charcoal |
0.0038 |
| PRI-07-86-L2.1-C17 |
2395 |
25 |
UNIDENTIFIED Charcoal |
0.0022 |
| PRI-07-86-L2.1-C12 |
1635 |
25 |
UNIDENTIFIED Hardwood |
0.0027 |
| PRI-07-86-L2-l2.1-C11 |
110 |
25 |
Meliaceae Charcoal |
0.0019 |
| PRI-07-86-L2-C6 |
1230 |
25 |
UNIDENTIFIED Charcoal |
0.0015 |
| PRI-07-86-PM2.2-C2 |
4170 |
25 |
UNIDENTIFIED Hardwood |
0.0018 |
| PRI-07-86-L2.4-C19 |
205 |
25 |
Meliaceae Charcoal |
0.0009 |
|
