Inferring Partial Intervals
Here is a more detailed description of how RockWorks infers partial intervals. NOTE: RockWorks does not actually change the data in the Stratigraphy data table. The examples below show how the inferences occur internally.
Missing Depth-to-Top (D1):
- If D1 is undefined,and D2 for the overlying unit is defined, the program will use the D2 value for the overlying unit as the D1 value.
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- If D1 is undefined, and there is no overlying unit, a value of zero (collar depth) will be used as the D1 value.
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Missing Depth-to-Base (D2):
- If D2 is undefined, and D1 for the underlying unit is defined, the program will use the D1 value form the underlying unit as the D2 value.
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- If D2 is undefined, and there is no underlying unit, the TD (total depth) will be used as the D2 value.
Note how the stratigraphy does NOT need to be ordered for the inference to work.
See: Graphic examples
Inferring Missing Contacts
Missing Depth-to-Top (D1):
- If D1 is undefined, and D2 for the overlying unit is undefined, the program will "split the difference" by computing the midpoint between the overlying D1 value and the underlying D2 value. This midpoint will then be used as the D2 value for the overlying unit and the D1 value for the underlying unit.
Missing Depth-to-Base (D2):
- If D2 is undefined, and D1 for the underlying unit is undefined, the program will compute the midpoint between the underlying D2 value and the overlying D1 value. This midpoint will then be used as the D1 value for the underlying unit and the D2 value for the overlying unit.
See: Graphic examples
Inserting Missing Units
- If a unit is completely absent from a given borehole, the program will attempt to insert it as a "zero-thickness" interval based on the relative order defined within the Stratigraphy Types table.
See: Graphic examples
Back to Stratigraphic Rules
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