is a leading free, spreadsheet-based software package used worldwide for calculating grain size distribution and sediment statistics. Originally created by Dr. Simon J. Blott and published alongside Professor Kenneth Pye, this tool has become a foundational asset for researchers, geologists, and civil engineers working in sedimentology and geomorphology. By embedding complex geological mathematics into a universally accessible Microsoft Excel format, it removes the tedious labor traditionally associated with physical geography data sorting.
Even though it is "old" software, the features remain powerful and relevant: gradistat v 91 free
: Matches numeric distributions directly to physical descriptors (e.g., "Very Well Sorted," "Coarsely Skewed") and formats final text classes utilizing standard Folk (1954) or Shepard systems . is a leading free, spreadsheet-based software package used
Derived strictly from the Folk (1954) or Blott and Pye (2012) classification triangles (e.g., "Fine gravelly coarse sand"). 4. High-Quality Visualizations Blott and published alongside Professor Kenneth Pye, this
Gradistat (Version 9.1) is a Microsoft Excel macro-enabled workbook developed by and Kenneth Pye of the now-closed Kenneth Pye Associates Ltd. (later part of Foster Wheeler). It was first introduced in the early 2000s and became the industry standard because it automated the tedious, error-prone process of calculating Folk and Ward (1957) graphical statistics, moments statistics, and the logarithmic method of moments.
GRADISTAT (GRAin DIStribution and STATistics) is a software package designed for analyzing grain size statistics. It is particularly popular because it operates within Microsoft Excel, making it accessible to anyone with a basic understanding of spreadsheets.
If you are looking for specific, recent datasets or tutorials, I can help search for tutorials like those showing how to calculate equivalent circular diameter, create a histogram, and adjust bin values for GRADISTAT.