Using a modern GRADISTAT pipeline involves a structured framework to convert raw geologic data into actionable research figures:
is a popular software package used for grain size distribution and statistical analysis of unconsolidated sediments. It is integrated into Microsoft Excel and allows for the rapid calculation of sample statistics such as mean, mode, sorting, and skewness using both the Method of Moments and the Folk and Ward (1957) graphical method. Key Features of GRADISTAT
[Gather Raw Weights] ➔ [Configure Sieve Bins] ➔ [Execute Macro] ➔ [Export Plots] GRADISTAT v 8.0 - Zenodo
This article explores why GRADISTAT v9.1 remains so relevant, its key analytical capabilities, the workflows that make it indispensable, and how it is cited in contemporary research as a cornerstone of sedimentological analysis. gradistat v 91 hot
Capable of processing approximately 50 samples per hour, making it ideal for large datasets.
As a Visual Basic for Applications (VBA) macro within Excel, it requires minimal installation and is easy to use for anyone familiar with spreadsheets. Key Features and Statistics Calculated by Gradistat V9.1
: It handles both standard and non-standard sieve sizes, allowing users to input weight or percentage retained in various size fractions. Graphical Output Using a modern GRADISTAT pipeline involves a structured
The graphical methods calculate central tendency, sorting (variance), symmetry, and peak sharpness based on percentiles extracted from cumulative curves: : Calculates overall average size.
| 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 |
Generates detailed numerical statistics and instantly creates visual plots, including frequency graphs, cumulative curves, and ternary diagrams. Capable of processing approximately 50 samples per hour,
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.
Manually calculating sediment parameters for dozens of samples is labor-intensive and error-prone. GRADISTAT solves this problem by allowing scientists to process approximately , translating raw data into standardized statistical summaries and graphical figures.
Sample: S-01 Method: Graphical (Folk & Ward) Mean (Mz) : 2.12 φ Sorting (σI) : 0.69 φ Skewness (SKI): 0.23 Kurtosis (KG) : 1.18 Mode(s) : 2.00 φ D10, D50, D90 : 1.15 φ, 2.10 φ, 3.05 φ