Optically Stimulated Luminescence (OSL) Dataset from Tsunami Sand Sheet at PanjorPir, Gujarat, India

This dataset contains accepted equivalent dose (De) values and associated quality control parameters derived from Single-Aliquot Regenerative dose (SAR) measurements on quartz grains extracted from tsunami deposits at the ISR-Pp site, Gujarat, western India. These values were used for optically stimulated luminescence (OSL) age modeling to constrain the chronology of Holocene high-energy coastal events. Sample Context: - Site: ISR-Pp (PanjorPir, Kachchh Gujarat coast) - Material: Quartz grains (90–125 µm) extracted from coastal tsunami deposits - Protocol: SAR protocol performed using a Risø TL/OSL DA-20 reader with a 90Sr/90Y beta source Columns in the dataset: - `ED`: Equivalent dose (Gy) measured for each aliquot - `Err ED`: 1σ uncertainty associated with each De value (Gy) - `Er % (20)`: Relative error as a percentage of De (to guide acceptance threshold) - `EDi/si²`: Value of (De / σ²), for computing weighted averages - `1/si²`: Inverse squared De uncertainty (used in CAM and weighted mean calculations) Processing & Acceptance: Aliquots included in this table met the following SAR acceptance criteria: - Recycling Ratio between 0.9 and 1.1 - De Error ≤ 15% - Test signal change ≤ 10% (if assessed) Final values were used to calculate an age with different age models, with an overdispersion of ~36% and positive skewness (0.5), indicating a partially bleached De distribution. Software: Data analysis was performed using Microsoft Excel and the Luminescence package in R.