Table DR1. UW-Madison standard intercomparison. Figure DR1. Positions of samples and standards in irradiations UW-06 and UW-11 with J values
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![Data Repository item 2003064 Standard Table DR1. UW-Madison standard intercomparison n UW-Madison Age (Ma) ± 2 1 MSWD Accepted Age (Ma) ± 2 1 GA1550 7* 98.69 ± 0.57 # 0.48 [98.79 ± 0.54] MMhb 8* 522.](/docs-images/91/105517727/images/1-0.jpg "39 ± 2.98** 17.7 523.1 ± 2.6 ## SB-3 7 165.72 ± 0.85** 5.21 [162.9 ± 1.8]*** FCs 17* 28.02 ± 0.14 # 0.81 28.02 ± 0.16 *single crystal laser fusions multigrain fusions intercalibration uncertainties relative to 28.")
1 Data Repository item Standard Table DR1. UW-Madison standard intercomparison n UW-Madison Age (Ma) ± 2 1 MSWD Accepted Age (Ma) ± 2 1 GA1550 7* ± 0.57 # 0.48 [98.79 ± 0.54] MMhb 8* ± 2.98** ± 2.6 ## SB ± 0.85** 5.21 [162.9 ± 1.8]*** FCs 17* ± 0.14 # ± 0.16 *single crystal laser fusions multigrain fusions intercalibration uncertainties relative to ± 0.16 Ma for Taylor Creek Rhyolite sanidine (Duffield and Dalrymple, 1990; Renne et al., 1998) # weighted mean age **total fusion age, reported when MSWD >2 intercalibration uncertainties relative to ± 0.54 Ma for GA1550 biotite (Renne et al., 1998) primary standard biotite (isotope dilution, McDougall and Roksandic, 1974; Renne et al., 1998) ## McClure Mountain syenite hornblende (Sampson and Alexander, 1987; Renne et al., 1998) ***USGS standard biotite (Lanphere and Dalrymple, 2000); note that the value reported here for SB-3 (relative to ± 0.16 for TCs) is 1.73% older than the age reported by Lanphere and Dalrymple (2000); it is, however, consistent with the GA1550 age adopted by Renne et al. (1998), which is 1.85% older than the age determined by Lanphere and Dalrymple (2000) Fish Canyon tuff sanidine (Renne et al., 1998) Note: Values shown in brackets represent K-Ar ages for primary standards Figure DR1. Positions of samples and standards in irradiations UW-06 and UW-11 with J values
2 Table DR2. Complete results Sample xtal Experiment # Ar* % 40 Ar* K/Ca Age ± 2 1Ma Rife tuff BT-18 biotite J = ± 0.16% µ = UW11F2A ± ± ± ± 1.13 * UW11F2B ± ± ± ± 0.53 UW11F2C ± ± ± ± 1.50 UW11F2D ± ± ± ± 0.70 * UW11F2E ± ± ± ± 1.45 UW11F2F ± ± ± ± 1.10 * UW11F2G ± ± ± ± 0.89 * UW11F2H ± ± ± ± 1.01 * UW11F2I ± ± ± ± 1.14 UW11F2J ± ± ± ± 1.06 UW11F2K ± ± ± ± 1.60 * UW11F2L ± ± ± ± 0.94 * UW11F2M ± ± ± ± 1.97 UW11F2N ± ± ± ± 1.42 UW11F2O ± ± ± ± 2.02 UW11F2P ± ± ± ± 2.19 UW11F2Q ± ± ± ± 0.50 UW11F2R ± ± ± ± 1.57 * UW11F2S ± ± ± ± 0.87 * UW11F2T ± ± ± ± 1.11 * UW11F2U ± ± ± ± 0.53 UW11F2V ± ± ± ± 1.73 * UW11F2W ± ± ± ± 1.13 UW11F2X ± ± ± ± 1.51 Isochron age ± ± 0.68 Total fusion age ± ± 0.25 Weighted mean age ± ± 0.31 Firehole tuff FC-2 sanidine J = ± 0.14% µ = UW11G12A ± ± ± ± 8.40 UW11G12B ± ± ± ± 2.21 UW11G12C ± ± ± ± 4.34 UW11G12D ± ± ± ± 2.24 UW11G12E ± ± ± ± 2.61 UW11G12F ± ± ± ± 1.81 UW11G12G ± ± ± ± 0.59 UW11G12H ± ± ± ± 0.49 UW11G12I ± ± ± ± 0.49 UW11G12J ± ± ± ± 1.00 UW11G12K ± ± ± ± 0.43 UW11G12L ± ± ± ± 0. UW11G12M ± ± ± ± 0.29 UW11G12N ± ± ± ± 0.19 Isochron age ± ± 0.15 Total fusion age ± ± 0.26 Weighted mean age ± ± 0.14 C Bed tuff FC-3 biotite J = ± 0.16% µ = UW11F4A ± ± ± ± 0.52 UW11F4B ± ± ± ± 1.27 * UW11F4C ± ± ± ± 1.38 UW11F4D ± ± ± ± 0.72 UW11F4E ± ± ± ± 0.72 UW11F4F ± ± ± ± 1.32 UW11F4G ± ± ± ± 1.74 UW11F4H ± ± ± ± 1.67 * UW11F4I ± ± ± ± 1.04 UW11F4J ± ± ± ± 0.95 UW11F4K ± ± ± ± 0.88
3 Sample xtal Experiment # Table DR2. Complete results Ar* % 40 Ar* K/Ca Age ± 2 1Ma C Bed tuff cont... UW11F4L ± ± ± ± 1.53 * UW11F4M ± ± ± ± 1.30 UW11F4N ± ± ± ± 0.65 UW11F4O ± ± ± ± 0.78 UW11F4P ± ± ± ± 2.19 UW11F4Q ± ± ± ± 1.77 * UW11F4R ± ± ± ± 1.82 * UW11F4S ± ± ± ± 0.53 UW11F4T ± ± ± ± 2.11 Isochron age ± ± 0.45 Total fusion age ± ± 0.31 Weighted mean age ± ± 0.26 Grey tuff WN-1 sanidine J = ± 0.24% µ = UW0612A ± ± ± ± 0.59 UW0612B ± ± ± ± 0.63 UW0612C ± ± ± ± 0.44 UW0612D ± ± ± ± 0.53 UW0612E ± ± ± ± 0.65 UW0612F ± ± ± ± 0.30 UW0612G ± ± ± ± 0.80 UW0612H ± ± ± ± 1.13 UW0612I ± ± ± ± 0.90 UW0612J ± ± ± ± 0.56 sanidine J = ± 0.20% µ = UW11G11A ± ± ± ± 0.67 UW11G11B ± ± ± ± 0.35 UW11G11C ± ± ± ± 0.36 UW11G11D ± ± ± ± 0.27 UW11G11E ± ± ± ± 0.22 UW11G11F ± ± ± ± 0.19 UW11G11G ± ± ± ± 0.31 UW11G11H ± ± ± ± 0.49 Isochron age ± ± 0.21 Total fusion age ± ± 0.17 Weighted mean age ± ± 0.13 Main tuff TR-1 sanidine J = ± 0.24% µ = UW069A ± ± ± ± 0.24 UW069B ± ± ± ± 0.44 UW069C ± ± ± ± 0.22 UW069D ± ± ± ± 0.23 UW069E ± ± ± ± 0.30 UW069F ± ± ± ± 0. UW069G ± ± ± ± 0.42 UW069H ± ± ± ± 0.28 UW069I ± ± ± ± 0.32 UW069J ± ± ± ± 0.32 UW069K ± ± ± ± 0.33 UW069L ± ± ± ± 0.67 UW069M ± ± ± ± 0.45 UW069N ± ± ± ± 0.45 UW069O ± ± ± ± 0.43 UW069P ± ± ± ± 0.55 UW069Q ± ± ± ± 0.30 UW069R ± ± ± ± 0.57 UW069S ± ± ± ± 0.46 UW069T ± ± ± ± 0. UW069U ± ± ± ± 0.25
4 Sample Experiment xtal # Table DR2. Complete results Ar* % 40 Ar* K/Ca Age ± 2 1Ma Main tuff (sanidine) cont... sanidine J = ± 0.12% µ = * UW11G6A ± ± ± ± 1.18 UW11G6B ± ± ± ± 1.93 UW11G6C ± ± ± ± 1.12 UW11G6D ± ± ± ± 0.64 UW11G6E ± ± ± ± 0.19 UW11G6F ± ± ± ± 0.10 UW11G6G ± ± ± ± 0.18 UW11G6H ± ± ± ± 0.18 UW11G6I ± ± ± ± 0.16 UW11G6J ± ± ± ± 0.17 Isochron age ± ± 0.09 Total fusion age ± ± 0.09 Weighted mean age ± ± 0.08 Main tuff TR-1b biotite J = ± 0.12% µ = * UW11G6bA ± ± ± ± 0.97 * UW11G6bB ± ± ± ± 1.15 UW11G6bC ± ± ± ± 2.33 UW11G6bD ± ± ± ± 1.03 UW11G6bE ± ± ± ± 2.49 UW11G6bF ± ± ± ± 1.15 * UW11G6bG ± ± ± ± 0.35 UW11G6bH ± ± ± ± 0.53 UW11G6bI ± ± ± ± 0.66 UW11G6bJ ± ± ± ± 0.49 * UW11G6bK ± ± ± ± 0.23 * UW11G6bL ± ± ± ± 0.48 * UW11G6bM ± ± ± ± 0.54 * UW11G6bN ± ± ± ± 0.32 UW11G6bO ± ± ± ± 0.27 * UW11G6bP ± ± ± ± 0.36 UW11G6bQ ± ± ± ± 0.54 UW11G6bR ± ± ± ± 0.46 * UW11G6bS ± ± ± ± 0.46 UW11G6bT ± ± ± ± 0.60 * UW11G6bU ± ± ± ± 0.63 UW11G6bV ± ± ± ± 0.50 UW11G6bW ± ± ± ± 0.48 UW11G6bX ± ± ± ± 0.56 * UW11G6bY ± ± ± ± 0.41 * UW11G6bZ ± ± ± ± 0.42 * UW11G6bAA ± ± ± ± 0.43 UW11G6bBB ± ± ± ± 0.93 UW11G6bCC ± ± ± ± 0.45 * UW11G6bDD ± ± ± ± 0.60 Isochron age ± ± 0.20 Total fusion age ± ± 0.12 Weighted mean age ± ± th tuff TR-5 sanidine J = ± 0.18% µ = * UW11F9A ± ± ± ± 1.71 UW11F9B ± ± ± ± 5.35 * UW11F9C ± ± ± ± 4.61 * UW11F9D ± ± ± ± * UW11F9E ± ± ± ± 3.28 * UW11F9F ± ± ± ± 5.00 UW11F9G ± ± ± ± * UW11F9H ± ± ± ± * UW11F9I ± ± ± ± 7.26 UW11F9J ± ± ± ± 8.06 * UW11F9K ± ± ± ± 2.87
5 Sample Experiment xtal # Table DR2. Complete results Ar* % 40 Ar* K/Ca Age ± 2 1 Ma 6 th tuff (sanidine) cont... * UW11F9L ± ± ± ± 0.79 * UW11F9M ± ± ± ± 1.76 * UW11F9N ± ± ± ± 1.84 * UW11F9O ± ± ± ± 4.38 UW11F9P ± ± ± ± 7.59 * UW11F9Q ± ± ± ± 0.86 UW11F9R ± ± ± ± 3.06 UW11F9S ± ± ± ± 1.28 * UW11F9T ± ± ± ± 1.05 * UW11F9U ± ± ± ± 1.08 UW11F9V ± ± ± ± 3.30 UW11F9W ± ± ± ± 4.11 * UW11F9X ± ± ± ± 1.02 * UW11F9Y ± ± ± ± 3.19 Isochron age ± ± 1.20 Total fusion age ± ± 0.73 Weighted mean age ± ± th tuff TR-5b biotite J = ± 0.16% µ = UW11F10A ± ± ± ± 0.28 UW11F10B ± ± ± ± 0.42 UW11F10C ± ± ± ± 0.53 UW11F10D ± ± ± ± 0.56 UW11F10E ± ± ± ± 0.43 UW11F10F ± ± ± ± 0.38 UW11F10G ± ± ± ± 0.51 UW11F10H ± ± ± ± 0.55 UW11F10I ± ± ± ± 0.91 * UW11F10J ± ± ± ± 0.58 UW11F10K ± ± ± ± 0.40 * UW11F10L ± ± ± ± 0.74 UW11F10M ± ± ± ± 0.70 UW11F10N ± ± ± ± 0.27 UW11F10O ± ± ± ± 0.26 UW11F10P ± ± ± ± 0.27 UW11F10Q ± ± ± ± 0.23 UW11F10R ± ± ± ± 0.30 UW11F10S ± ± ± ± 0.38 * UW11F10T ± ± ± ± 0.23 UW11F10U ± ± ± ± 0.25 UW11F10V ± ± ± ± 0.13 UW11F10W ± ± ± ± 0.27 * UW11F10X ± ± ± ± 0.53 UW11F10Y ± ± ± ± 0.59 UW11F10Z ± ± ± ± 0.34 Isochron age ± ± 0.14 Total fusion age ± ± 0.11 Weighted mean age ± ± 0.10 Analcite tuff SB-1 sanidine J = ± 0.24% µ = UW0610A ± ± ± ± 0.44 UW0610B ± ± ± ± 0.36 UW0610C ± ± ± ± 0.62 UW0610D ± ± ± ± 0.39 UW0610E ± ± ± ± 0.49 UW0610F ± ± ± ± 0.43 UW0610G ± ± ± ± 0.26 UW0610H ± ± ± ± 0.38 UW0610I ± ± ± ± 0.47 UW0610J ± ± ± ± 0.49
6 Sample Experiment xtal # Table DR2. Complete results Ar* % 40 Ar* K/Ca Age ± 2 1 Ma Analcite tuff (sanidine) cont... sanidine J = ± 0.21% µ = UW11G10A ± ± ± ± 0.41 UW11G10B ± ± ± ± 1.30 UW11G10C ± ± ± ± 0.16 UW11G10D ± ± ± ± 0.30 UW11G10E ± ± ± ± 0.19 UW11G10F ± ± ± ± 0.38 UW11G10G ± ± ± ± 0.26 UW11G10H ± ± ± ± 0.29 UW11G10I ± ± ± ± 0.19 Isochron age ± ± 0.21 Total fusion age ± ± 0.14 Weighted mean age ± ± 0.12 * indicates analyses that have been excluded from age calculations Note: All ages calculated relative to Ma for the Taylor Creek rhyolite sanidine (Renne at al., 1998); using the decay constants of Steiger and Jäger (1977); uncertainties in Ar isotope ratios reported at 1 1analytical precision, uncertainties in ages reported at 2 1analytical precision. Corrected for Ar and 39 Ar decay, half lives of 35.2 days and 269 years, respectively.
7 Table DR3. Recalibration of Magnetic Chron Boundaries Chron Cande and Kent (1995) This study % Difference C19r C20r C21r C22r C23n.1r C23r C24n.1r C24n.2r C24r Note: Boundary ages are shown in Ma. 2 Vintercalibration uncertainties for calibration points used to interpolate chron boundary ages range from ± 0.2 to 0.5 m.y. References cited in Data Repository: Cande, S.C., Kent, D.V., 1995, Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic: Journal of Geophysical Research, v. 100, no. B4, p Duffield, W. A., and G. B. Dalrymple, 1990, The Taylor Creek Rhyolite of New Mexico: A rapidly emplaced field of lava domes and flows: Bulletin of Volcanology, v. 52, p Lanphere, M.A., and Dalrymple, G.B., 2000, First-principles calibration of 38 Ar tracers: Implications for ages of fluence monitors: US Geological Survey Professional Paper McDougall, I., and Roksandic, Z., 1974, Total fusion ages using HIFAR reactor: Geological Society of Australia Journal, v. 21, p Renne, P.R., Swisher, C. C., Deino, A. L., Karner, D. B., Owens, T. L., and DePaolo, D.J., 1998, Intercalibration of standards, absolute ages and uncertainties in dating. Chemical Geology, v. 145, p Sampson, S.D., and Alexander, E.C.Jr., 1987, Calibration of the interlaboratory dating standard, MMhb- 1: Chemical Geology, v. 66, p Steiger, R.H., and Jäger, E., 1977, Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology, Earth and Planetary Science Letters, v. 36, p
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