Core Recovery Length Ratio Tool

Description

countedLength = recoveredLength-excludedRecoveredLength; ratio = countedLength/runLength.

Geological records use depth datums, age-before-present coordinates and recovery definitions. A signed difference or recovered-length ratio can expose a supplied inconsistency without reconstructing geological history or correcting sample loss.

countedLength = recoveredLength-excludedRecoveredLength; ratio = countedLength/runLength.

When to use this tool

Use Core Recovery Length Ratio when checking an explicit geological coordinate, interval or recovery convention.

How to use the tool and how it works

Enter recoveredLength, runLength, excludedRecoveredLength. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read countedLength, ratio. Use the output convention below.

Require positive runLength and 0 <= excludedRecoveredLength <= recoveredLength. countedLength = recoveredLength-excludedRecoveredLength; ratio = countedLength/runLength.^[1]

Input field	Meaning and units	Accepted input
recoveredLength	Recovered Length	Required. Finite number; minimum 0.
runLength	Run Length	Required. Finite number; strictly above 0.
excludedRecoveredLength	Excluded Recovered Length	Required. Finite number; minimum 0.

Output field	Interpretation	Returned shape
countedLength	Counted Length	Required. Finite number.
ratio	Ratio using the stated numerator and denominator convention.	Required. Finite number.

json

{
  "input": {
    "recoveredLength": 12,
    "runLength": 10,
    "excludedRecoveredLength": 1
  },
  "output": {
    "countedLength": 11,
    "ratio": 1.1
  }
}

Limitations and assumptions

The ratio may exceed one because recoveredLength is not capped by runLength. Exclusion criteria, expansion and core reconciliation are caller responsibilities.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Use verified datums, original logs and appropriate geological interpretation when correlating units or reconstructing missing intervals.

References

Calculation and input contract: earth-science/core-recovery-length-ratio — tool.io

Similar or alternative tools

Core Recovery Run Length Gap
measuredRecovery = recoveredLength/runLength; possibleRecovery includes the fragmented amount; missingLength is the remainder.
Core Section Depth Recovery Gap
drilledLength = bottomDepth-topDepth; unrecoveredLength = drilledLength-recoveredLength; recoveryFraction = recoveredLength/drilledLength.