https://ctech.com/studio_help/file-format-details/pre-geology-file/index.htmlPre Geology File: Lithology The ASCII pregeology file name must have a .pgf suffix to be selected in the module’s file browser. This file type represents raw (uninterpreted) 3D boring logs representing lithology. This format is used by: create stratigraphic hierarchy post_samples gridding and horizons (to extract a top and bottom surface to build a single layer)Hugoen-ushttps://ctech.com/studio_help/file-format-details/pre-geology-file/pgf-file-examples/index.htmlMon, 01 Jan 0001 00:00:00 +0000https://ctech.com/studio_help/file-format-details/pre-geology-file/pgf-file-examples/index.htmlIn the (very short) example file below, please note that the Lithology IDs and Names are not ordered by increasing ID number. The order that you specihttps://ctech.com/studio_help/file-format-details/pre-geology-file/pgf-file-example-with-depth/index.htmlMon, 01 Jan 0001 00:00:00 +0000https://ctech.com/studio_help/file-format-details/pre-geology-file/pgf-file-example-with-depth/index.htmlEasting Northing Depth Lithology_ID Boring_ID Ground