Sample no. (Lab no.)*
IRSL age ±2σ (ka)§
DE ±2s (Gy) [Age model]†
Lat, Long (degrees)#
Elevation(m), date Elevation(m), date
Geologic setting
17IP-10-8A (USU-2694)
4.18 ± 1.39
2.33 ± 0.74 [MAM]
58.397160, -137.089075 57 m, 5/31/17
Dune crest on highest part of Terrace B, sample depth = 105 cm. Unconsolidated laminated medium-to-fine-grained sand.
Dune crest on highest part of Terrace B, sample depth = 105 cm. Unconsolidated laminated medium-to-fine-grained sand.
Dune crest on highest part of Terrace B, sample depth = 105 cm. Unconsolidated laminated medium-to-fine-grained sand.
17IP-10-7A, (USU-2693)
4.74 ± 1.10
3.22 ± 0.68 [CAM]
58.397160, -137.089075 57 m, 5/31/17
Dune crest overlying the highest part of Terrace B, sample depth = 142 cm. Unconsolidated laminated medium-to-fine-grained sand.
Dune crest overlying the highest part of Terrace B, sample depth = 142 cm. Unconsolidated laminated medium-to-fine-grained sand.
Dune crest overlying the highest part of Terrace B, sample depth = 142 cm. Unconsolidated laminated medium-to-fine-grained sand.
17IP-28-2A, (USU-2696)
4.39 ± 0.66
4.16 ± 0.51 [CAM]
58.400163, -137.080493 35 m, 6/6/17
Tocher’s Gulch, sample depth = 270 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations.
Tocher’s Gulch, sample depth = 270 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations.
Tocher’s Gulch, sample depth = 270 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations.
17IP-28-1A, (USU-2695)
5.99 ± 1.02
4.01 ± 0.58 [MAM]
58.400163, -137.080493 35 m, 6/6/17
Tocher’s Gulch, sample depth = 389 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations, cobbles (few).
Tocher’s Gulch, sample depth = 389 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations, cobbles (few).
Tocher’s Gulch, sample depth = 389 cm below shoreline B8 of Terrace B, beach sand with heavy mineral laminations, cobbles (few).
17IP-30-1A, (USU-2697)
5.98 ± 1.71
4.28 ± 1.16 [MAM]
58.406014, -137.084810 20 m, 5/30/17; 6/6/17
Trident Channel (Fig. 5), sample depth = 134 cm, laminated-to-cross-laminated fluvial/beach sand and gravel.
Trident Channel (Fig. 5), sample depth = 134 cm, laminated-to-cross-laminated fluvial/beach sand and gravel.
Trident Channel (Fig. 5), sample depth = 134 cm, laminated-to-cross-laminated fluvial/beach sand and gravel.
*Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west. *Analyses performed by Utah State University (USU) Luminescence Laboratory. Age analysis using the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. Number of aliquots used in age calculation and number of aliquots analyzed in parentheses. §IRSL age on each aliquot corrected for fading following the method by Auclair et al. (2003) and correction model of Huntley and Lamothe (2001). †Equivalent dose (DE) and IRSL age calculated using the Central Age Model (CAM) or Minimum Age Model (MAM) of Galbraith and Roberts (2012). #Latitude, decimal degrees north; longitude, decimal degrees west.