Marker ages assign a geological age (and an optional type) to the markers of a marker set. g-Space reads them from a plain, tab-separated text .txt file with three columns: Marker, Age and Type. This topic covers importing that file; a matching export is also available (see Export marker ages).

Purpose

Populate the ages of existing markers in a marker set from an external table. Only markers whose names already appear in the set are updated; the import matches on marker name and does not create new markers. Ages drive age-based colouring against the project stratigraphy.

Launching the import

In the Data manager, right-click the target marker set and choose Import markers ages.

[image: placeholder_The_marker_set_right-click_menu_in_the_D.png]

Step-by-step

1. Right-click the marker set to update and select Import markers ages.
2. In the file dialog, set the filter to Text file (*.txt) and choose the ages file.
3. Each line is split on tabs and matched to a marker by the name in the first column. Matching markers receive the age from the second column and, when present, the type from the third.
4. Lines whose marker name is not found in the set, and lines missing a name or age, are skipped. The marker set is flagged as modified and the Data manager refreshes.

[image: placeholder_The_updated_marker_set_showing_imported_.png]

File format

The file is tab-separated with one marker per line. Columns are:

• Marker - the marker name, which must match a marker already in the set.
• Age - the numeric age value.
• Type - optional integer: 0 = Marker, 1 = Fault, 2 = Intrusion. When omitted, the type defaults to Marker.

This is the same layout produced by Export marker ages, so an exported file can be edited and re-imported. Marker ages are part of the geological interpretation license.

See Also

Export marker ages | Import markers | Well Data Formats