Geology Fault Bend Fold Kink Angle Calculator
Measured signed section kink rotations for fault-bend fold restoration; no unsupported ramp-to-kink inversion. 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
A kink-angle comparison measures the signed difference between two independently measured limb orientations.
A kink-angle comparison measures the signed difference between two independently measured limb orientations.1
Angle conventions and limb assignment determine the sign; the difference alone does not restore a fault-bend fold. Use this tool to calculate fault bend fold kink angle from the supplied measurements and assumptions.
When to use Geology Fault Bend Fold Kink Angle Calculator
Use this tool to calculate fault bend fold kink angle 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 Fault Bend Fold Kink Angle Calculator and understand its results
- Establish the measurement units, sampled interval, calibration or model edition and geological assumptions before entering data.
- Enter firstLimbAnglesDegrees, secondLimbAnglesDegrees, using the field meanings and rules below, then run the tool.
- Read signedKinkRotationsDegrees. 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 |
|---|---|---|---|
| firstLimbAnglesDegrees | First limb angles degrees | list of number | Required |
| secondLimbAnglesDegrees | Second limb angles degrees | list of number | Required |
Enter nonempty aligned first and second limb angles between −90 and 90 degrees inclusive. Return second minus first for each pair, without wrapping or absolute value. Differences can range from −180 to 180 degrees.
signedRotationDeg_i=secondLimb_i−firstLimb_i Use the exact units, boundary rules, ordering and missing-evidence conventions above.
| Output field | Meaning | Value type |
|---|---|---|
| signedKinkRotationsDegrees | Signed Kink Rotations Degrees; follow the units, sign, ordering and evidence convention stated above | list of number |
{
"input": {
"firstLimbAnglesDegrees": [
10,
30
],
"secondLimbAnglesDegrees": [
40,
10
]
},
"output": {
"signedKinkRotationsDegrees": [
30,
-20
]
}
}Limitations and assumptions
Angle conventions and limb assignment determine the sign; the difference alone does not restore a fault-bend fold. 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 Flexural Slip Restoration Calculator for this related task: Flexural slip relates bed separation and rotation to an idealized relative displacement.
Use Geology Balanced Cross Section Line Length Calculator when its separate inputs and assumptions fit the question: A balanced-section line length sums distances along an independently ordered polyline.
References
Similar or alternative tools
- Geology Flexural Slip Restoration Calculator
Flexural slip relates bed separation and rotation to an idealized relative displacement.
- Geology Balanced Cross Section Line Length Calculator
A balanced-section line length sums distances along an independently ordered polyline.