Gradistat V 91 Link

: The degree of asymmetry in the grain size distribution curve.

GRADISTAT processes mass or percentage data retained within specific size intervals. It bypasses manual, error-prone graphical calculations by computing foundational sedimentological metrics instantly:

: Statistics are calculated using both the Folk and Ward (1957) graphical method and the moment method .

The software calculates logarithmic statistics using the traditional Folk and Ward graphical method. It automatically assigns standard descriptive terms to characterize your sample, providing clarity on: : The average size of the sediment distribution. gradistat v 91 link

Using the software is straightforward, provided your data is formatted correctly.

: It computes mean, mode, sorting, and skewness using both the Folk and Ward (1957) and Method of Moments methods .

The foundational framework was introduced by Blott and Pye (2001) in their paper published in Earth Surface Processes and Landforms . It processes sample populations down to row 230, generating complex mathematical outputs within seconds. Main Capabilities : Accepts both linear metric units ( ) and logarithmic scale data ( : The degree of asymmetry in the grain

: Since GRADISTAT relies on VBA, ensure you "Enable Content" when Excel opens the file.

If you are a sedimentologist, geomorphologist, or environmental scientist looking for an efficient way to analyze grain size data, is likely a name you have encountered. Developed by Dr. Simon Blott and Dr. Kenneth Pye, this specialized software is designed to turn raw data from sieve or laser granulometer analyses into actionable statistics.

University of Hull: Many users find the software hosted through UK university sedimentology departments where the tool was originally developed and refined. : It computes mean, mode, sorting, and skewness

Right-click the file, select , check the Unblock safety box at the bottom of the General tab, and click Apply.

Because GRADISTAT runs inside Microsoft Excel, getting it operational requires specific macro considerations: