Radiocarbon and Luminescence Data for Fairweather Fault Investigation, Glacier Bay National Park, Southeast Alaska

Radiocarbon analyses were conducted at the National Ocean Sciences Accelerator Mass Spectrometry Facility, Woods Hole, Massachusetts. Samples for radiocarbon dating were plant macrofossils collected from alluvial and peat-forming (muskeg) environments; they included delicate peat moss (Sphagnum spp) stems and leaves, conifer needles and cones, woody twigs, detrital wood, tree-ring wood from sub-fossil stumps, and marine bivalve shell material. Calibrated radiocarbon ages were computed from lab-reported ages using OxCal (version 4.4.2) (Bronk Ramsey, 2009) with the IntCal13 data set of Reimer and others, 2013. The C-14 dataset reports one-sigma, analytic ages in radiocarbon years before 1950 (14C yr BP).

Infrared stimulated luminescence (IRSL) ages were determined by the Utah State University (USU) Luminescence Laboratory, North Logan, Utah. Age analyses used the single-aliquot regenerative-dose procedure of Wallinga et al. (2000) on 2mm small-aliquots of feldspar sand at 50°C IRSL. 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).