Compositing in Interval files

Sometimes samples taken at 1m intervals are composited to larger intervals. Assay intervals that warrant further attention are then assayed at 1m spacing. In this situation it is often tempting to record both the longer interval and the 1m intervals. The program will not accept both. Only the 1m samples should be retained since they provide more information than the longer composites. If you intend to plot the composites, they should be kept in a separate file.

In the portion of the Interval file shown, the record for the 5m interval enclosed in the rectangle should not be included. It will invalidate sample continuity. This will be flagged as an error by the drillhole functions.