Gradistat V 91 Link Site

What generated your raw numbers (physical sieves or a laser granulometer)?

The software accepts raw mass weights or percentages and instantly extracts critical metrics: The average size of the overall population. Mode: The most frequently occurring grain size diameter. Sorting ( σIsigma sub cap I

Check the comments below—community members often post active links to the Gradistat v 9.1 archive. gradistat v 91 link

The software generates a comprehensive suite of sample descriptive criteria. Understanding these parameters is essential for interpreting depositional energy and transport dynamics. 1. Mean Grain Size ( Mzcap M sub z

: While specific documentation for "v 9.1" is less common on the official site than Version 8.0, it is cited in recent academic papers (e.g., studies on microplastics distribution) as the tool used for Folk and Ward grain size analysis . Key Features of GRADISTAT What generated your raw numbers (physical sieves or

Originally developed by Simon J. Blott and Kenneth Pye, GRADISTAT was designed to automate the calculation of grain size statistics from standard measurement techniques, such as dry/wet sieving and laser granulometry. The program was introduced to the scientific community via a seminal paper in Earth Surface Processes and Landforms in 2001, and has since become a benchmark tool in sedimentary geology.

: Open the .xlsm file and navigate to the "Single Sample Data Input" or "Multiple Sample Data Input" sheet. Sorting ( σIsigma sub cap I Check the

A highly rigorous mathematical approach that utilizes the entire weight distribution of the sample rather than just specific percentiles.

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Evaluating the peakedness or flatness of the distribution compared to a normal curve. Percentiles: Standard values ranging from D10cap D sub 10 D90cap D sub 90 , crucial for engineering and hydrological modeling. 3. Automated Textural Classification