Gradistat V 91 Hot File

The program accepts raw percentage or weight data from virtually all standard grain-sizing techniques:

(a popular, frequently cited version of the grain-size distribution and statistics package developed by Blott and Pye) is widely regarded as a staple tool in sedimentology, geomorphology, and environmental science. Originally designed to run within Microsoft Excel, this software simplifies the complex task of calculating particle size parameters for sieve and laser granulometer data.

┌───────────────────────────────────────┐ │ GRADISTAT Core Analytics Engine │ └───────────────────┬───────────────────┘ │ ┌─────────────────────────┴─────────────────────────┐ ▼ ▼ ┌─────────────────────────────────┐ ┌─────────────────────────────────┐ │ Method of Moments │ │ Folk & Ward Graphical │ ├─────────────────────────────────┤ ├─────────────────────────────────┤ │ • Uses full distribution data │ │ • Relies on specific percentiles│ │ • Highly sensitive to tails │ │ • Immune to extreme tail errors │ │ • Arithmetic & Geometric scales │ │ • Standard Logarithmic (Phi) │ └─────────────────────────────────┘ └─────────────────────────────────┘ 1. The Method of Moments

A quick search through recent scientific publications reveals the widespread adoption of GRADISTAT v9.1. For instance, in a 2024 study from the University of Liverpool, researchers used a Laser Particle Size Analyzer (LPSA) to determine grain size distributions. The raw data produced by the instrument was then "processed using GRADISTAT® version 9.1 software to quantify statistical attributes of the sample's texture". Similarly, a data article published in 2025 provided a clear example of data entry for sediment texture for "GRADISTAT v9.1," showing the aperture in microns and the class weight retained. gradistat v 91 hot

: Places samples automatically onto standard ternary classification diagrams, such as the Folk Sediment Classification Scheme. ⚙️ Step-by-Step Guide: Running GRADISTAT v9.1

GRADISTAT v9.1: The Premier Software for Grain Size Analysis and Sediment Statistics

Version 9.1 is one of the most widely cited releases of GRADISTAT. Many research papers explicitly state: The program accepts raw percentage or weight data

Its reach extends across the globe. A study of the Sungsang Estuary in South Sumatra, Indonesia, explicitly states they "used the help of the GRADISTAT v9.1 program" in conjunction with a Malvern Mastersizer 3000 laser particle analyzer to analyze core sediments. In another study, researchers in Turkey investigating lake sediments noted that "grain-size parameters were directly extracted... and Gradistat V9.1". Even recent research on beach cusps in the Parangtritis coastal area of Indonesia was analyzed using "Gradistat 9.1 to analyze the grain size characteristics". The widespread use of this specific version in academic, governmental, and institutional settings is what makes it the "hot" standard for grain size analysis.

: Computes data via both the Method of Moments (arithmetic and geometric) and the traditional Folk and Ward graphical methods (logarithmic).

| Software / Package | Platform | Licensing | Key Strengths | |--------------------------------|-----------------------------|------------------|------------------------------------------------| | | Microsoft Excel (macros) | Free | Excel‑based, easy to use, graphical plots | | GRADISTAT v8.0 | Microsoft Excel (macros) | Free | Updated for newer Excel versions | | G2Sd (R package) | R | Free (GPL) | Integrates with R workflows, reproduces GRADISTAT statistics | | AnalySize | Matlab | Free / Academic | End‑member modelling of grain size distributions | | SedStat | Standalone Windows | Commercial | Advanced statistical methods, less common | | Mastersizer / Malvern Suite | Vendor‑specific | Commercial | Hardware integration, real‑time data capture | The Method of Moments A quick search through

: Allows users to tag specific samples as "hot" in the Excel input sheet to automatically adjust the calculation of sorting, skewness, and kurtosis based on known thermal impacts.

: If entering absolute mass, ensure your total sample weight matches the total summed inputs.

is currently the most popular, high-utility Excel-based software program utilized by geomorphologists, geology departments, and environmental consulting groups globally for rapid grain-size statistics. Developed originally by Dr. Simon Blott and published in Earth Surface Processes and Landforms , this tool streamlines the painstaking math behind unconsolidated sediment classification.