New U-Pb constraints and geochemistry of the East Kirkton Quarry, Scotland: Implications for early tetrapod evolution in the Carboniferous
Fig 5
Samples EK82 and EK83 kernel density estimation (KDE) distribution plots.
LA-ICP-MS 238U-206Pb and 207Pb-206Pb zircon dates with (±2σ) uncertainties from 10% discordance filter dataset. Maximum depositional age (MDA) methods (detrital youngest single grain [Dz YSG]; most concordant youngest single grain [YSG]; youngest cluster of three or more grains overlapping within 2σ uncertainty [YC2σ+3]; youngest mode weighted mean [YMWM]). Colors represent the period (pink: Precambrian; light green: Cambrian; teal: Ordovician; aquamarine: Silurian; orange: Devonian; light blue: Mississippian; blue: Pennsylvanian).