Geology Sorting Coefficient Trask Calculator
Trask√(D75/D25), ascending cumulative-percent-finer diameter quantiles. Caller independently establishes matching units, evidence, method edition and applicability; output is not compliance, diagnosis, work-safety approval, geological identity or validated hazard prediction.
Description
The Trask sorting coefficient compares two diameter percentiles through their ratio.
The Trask sorting coefficient compares two diameter percentiles through their ratio.1
Its interpretation depends on the percentile convention, since diameter and cumulative finer/coarser conventions can reverse the labels. Use this tool to calculate sorting coefficient trask from the supplied measurements and assumptions.
When to use Geology Sorting Coefficient Trask Calculator
Use this tool to calculate sorting coefficient trask from the supplied measurements and assumptions. Establish the measurement units, sampled interval, calibration or model edition and geological assumptions before entering data.
How to use Geology Sorting Coefficient Trask Calculator and understand its results
- Establish the measurement units, sampled interval, calibration or model edition and geological assumptions before entering data.
- Enter d25Mm, d75Mm, using the field meanings and rules below, then run the tool.
- Read traskSorting. Interpret the fields using their units, signs and evidence conventions below.
- If input validation fails, correct the reported field and run again. Before applying the result, check reference scope, model assumptions and any missing evidence or placeholder values.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| d25Mm | D25 mm | number | Required |
| d75Mm | D75 mm | number | Required |
Require positive d25 and d75 in millimeters with d25≤d75 on the declared diameter-percentile convention. Return the square root of d75/d25; equal diameters return 1. No percentile estimation from raw grains is performed.
TraskSorting=√(d75/d25) Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| traskSorting | Trask Sorting; follow the units, sign, ordering and evidence convention stated above | number |
{
"input": {
"d25Mm": 1,
"d75Mm": 4
},
"output": {
"traskSorting": 2
}
}Limitations and assumptions
Its interpretation depends on the percentile convention, since diameter and cumulative finer/coarser conventions can reverse the labels. Interpretation depends on the units, sampling scope and exact model described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse evidence arrays fail validation; the specific bounds and alignment requirements are stated above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful result reporting false, no matches or missing evidence.
Alternative or Complementary methods
Use Geology Wentworth Phi To Mm Calculator for this related task: The phi grain-size scale is logarithmic, with increasing phi corresponding to decreasing diameter.
Use Geology Wentworth Grain Size Phi Calculator when its separate inputs and assumptions fit the question: A phi value is the negative base-two logarithm of grain diameter measured in millimeters.
References
Similar or alternative tools
- Geology Wentworth Phi To Mm Calculator
The phi grain-size scale is logarithmic, with increasing phi corresponding to decreasing diameter.
- Geology Wentworth Grain Size Phi Calculator
A phi value is the negative base-two logarithm of grain diameter measured in millimeters.