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The program was developed by Simon J. Blott and Kenneth Pye, and its original methodology was published in the journal Earth Surface Processes and Landforms in 2001. GRADISTAT is designed to run within Microsoft Excel, making it accessible and versatile for researchers.

Microsoft Excel (2016, 2019, 2021, or Microsoft 365).

These metrics are calculated using both the Folk and Ward (1957) and Method of Moments techniques. Why Choose GRADISTAT v9.1?

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button. The process may take several minutes depending on the number of samples. Review Results

: Runs statistics using both the traditional Folk and Ward (1957) graphical methods and the more rigorous mathematical Method of Moments .

As an Excel macro, it works in a familiar environment. Input your data, click "Run," and receive instant results. 3. Comprehensive Output The software produces detailed reports, including: Percentage of gravel, sand, and mud. Median and mean values. The program was developed by Simon J

Note: Ensure your Microsoft Excel allows macro-enabled workbooks ( .xlsm or .xls ) to run the program properly. How to Use GRADISTAT v9.1 Using the software involves a simple workflow:

Calculates mean, sorting, skewness, kurtosis, mode, and D₅₀ (median).

For those of you working in sedimentology, geology, or environmental science, you’re likely familiar with —the go-to Microsoft Excel-based program for rapid grain size statistics analysis. Microsoft Excel (2016, 2019, 2021, or Microsoft 365)

While highly versatile, users should be aware that older versions of GRADISTAT might have compatibility issues with the newest versions of Excel (due to macro security updates). Always ensure your input data units match the expected input format (e.g., phi vs. millimeters). Conclusion

Mastering Particle Size Analysis: The Ultimate Guide to GRADISTAT

Open Microsoft Excel first. Go to File > Options > Trust Center > Trust Center Settings > Macro Settings . Select Disable VBA macros with notification or Enable VBA macros (depending on your organization's security policy).