Rock Classification

The Rock Classification tab is used to edit the default rock classification systems used in RSLog.

These Rock Classification definitions are sorted into the following categories:

• Rock Types: User can add rock types to the three major rock types. These rock types are used by the layer description compiler.
• Slaking: The process in which earth materials disintegrate and crumble when exposed to moisture.
• Hardness: Describes the hardness of intact rock core. The default values are after USBR 2001.
• Grain Size: Describe the grain or clast size. The default values are after USBR 2001.
• Bedding Spacing: Describes the bedding thickness or spacing of sedimentary or bedded volcanic rock. The default values are after USBR 2001.
• Fracture Density: The fracture density is based on the fracture spacing observed in recovered core, excluding mechanical breaks, measured along the core axis. The default values are after USBR 2001.
• Healing: Describes the fracture healing. The default values are after USBR 2001.
• Weathering: The physical (and sometimes chemical) decomposition of a rock due to exposure.
• Alteration: Any change in the mineralogic composition of a rock brought about by physical or chemical means.
• Strength: Strength classification is based on the Unconfined Compressive Strength (UCS) of core specimens. When assessing strength, the geologist/engineer should be aware that you are estimating the intact strength (a sample of rock breaking along a defect provides an invalid strength estimate and the strength should be reassessed).
• Defects: Divided into several categories including: Type, Surface Shape, Roughness, Infill Type, Infill Thickness, and Infill Character.

Editing a Classification

To edit a default rock classification definition:

1. Go to the left-hand navigation menu and select Settings page > Rock Classification tab.
2. Select the corresponding tabs for each classification system and adjust the default settings accordingly:
   1. Click + New button from the toolbar located on top of the table.
   2. Enter the Symbol, Term, and Description once the dialog is prompted.
   3. Click Save button.
3. To edit a record, hover on the record and click on Edit button on that row.
4. If you want to ‘reset to default’, click the corresponding button from the toolbar.

Re-ordering the Entries

In a rock classification table (e.g. Weathering) you can order the entries by grabbing the handle (on the left end of that row) and dragging the row to the desired position.