Geology Mid Ocean Ridge Spreading Rate Half Calculator
Declared symmetric half-spreading rate from full conjugate distance and actual duration, km/Ma=mm/yr. Symmetry/reconstruction external; not single-flank distance silently halved.
Description
Half-spreading rate allocates a reconstructed full ridge-separation distance to one side under symmetry.
Half-spreading rate allocates a reconstructed full ridge-separation distance to one side under symmetry.1
Kilometers per million years are numerically equivalent to millimeters per year. Use this tool to calculate the stated observation or conditional model from supplied measurements.
When to use Geology Mid Ocean Ridge Spreading Rate Half Calculator
Use this tool to calculate the stated observation or conditional model from supplied measurements. Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
How to use Geology Mid Ocean Ridge Spreading Rate Half Calculator and understand its results
- Establish the sample and coordinate basis, matching units, calibration source and applicable model assumptions.
- Enter independentlyReconstructedSymmetricFullSpreadingDistanceKm, actualElapsedMillionsOfYears, using the field meanings and rules below, then run the tool.
- Read result.conditionalHalfSpreadingRateMillimetersPerYear. Interpret each field using the units, signs and evidence rules below.
- If input validation fails, correct the reported field and run again. Before applying a successful result, check the stated reference scope, units, assumptions and any retained unknown evidence.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyReconstructedSymmetricFullSpreadingDistanceKm | Independently reconstructed symmetric full spreading distance km | number | Required |
| actualElapsedMillionsOfYears | Actual elapsed millions of years | number | Required |
Require nonnegative reconstructed symmetric full-spreading distance in kilometers and positive elapsed millions of years. Divide distance by twice elapsed time; numerical km/Myr equals mm/year. No asymmetric side-rate reconstruction is performed.
halfRateMmPerYear=fullDistanceKm/(2×elapsedMyr) Apply the field units and exact ordering, boundary and evidence rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result containing the calculation or selected reference fields below | object |
| result.conditionalHalfSpreadingRateMillimetersPerYear | Conditional Half Spreading Rate Millimeters Per Year; use the units, sign convention and calculation stated above | number |
{
"input": {
"independentlyReconstructedSymmetricFullSpreadingDistanceKm": 20,
"actualElapsedMillionsOfYears": 2
},
"output": {
"result": {
"conditionalHalfSpreadingRateMillimetersPerYear": 5
}
}
}Limitations and assumptions
Kilometers per million years are numerically equivalent to millimeters per year. Results depend on the independently established measurement basis and the exact model assumptions above.
Every listed input requires an explicit value. Unexpected fields, incorrect value types, nonfinite numbers and sparse numeric arrays fail validation; tool-specific bounds and alignment rules apply as described above. Extremely large inputs or outputs can also be rejected. An input error is distinct from a successful calculation that reports a false comparison or retains unknown evidence.
Alternative or Complementary methods
Use Geology Subduction Slab Dip Calculator to examine a related aspect: Slab dip relates a reconstructed depth difference to horizontal projection.
Use Geology Paleoslope Calculator where its separate inputs and scope apply: A reconstructed paleoslope relates signed vertical drop to horizontal run.
References
Similar or alternative tools
- Geology Subduction Slab Dip Calculator
Slab dip relates a reconstructed depth difference to horizontal projection.
- Geology Paleoslope Calculator
A reconstructed paleoslope relates signed vertical drop to horizontal run.