When selecting the “Depth Interval” option, a new view “Horizontal- slice” is created, and the “Define Lithological Classes” dialog box is opened, see Figure 19. Here the user can choose to classify the
lithology in up to five groups or define layers. If the user classifies the lithology in groups these groups will act as layers, otherwise a number of layers has to be defined. Each of the defined layers will represent one zonation.
8.1.1 Recommended procedure
• Select whether the lithology should be classified or not.
If classified is selected.
• Select the Edit button to open the Classification of Lithology dialog box, see Section 8.1.4 for a more detailed description of this dialog box.
• Select the number of classes to include, by toggling the visibility
checkbox on and off. By default all five classes will be selected
initially.
• Change the name of the classes by typing a new name in the name
box.
• Remove a lithology by selecting it from the list and pressing the
Remove button.
• Add a lithology to a group by;
a) Selecting the new lithology from the Add list. b) Activate the group by clicking in the lithology list. c) Press the Add button.
• Press the Close button to close this dialog box and return to the
Define Lithology Classes dialog box, see Figure 19.
• Press the Lit. by Interval button to close the Define Lithology
Classes dialog box and open the Lithology by Interval dialog
box, see Figure 21.
If not-classified is selected.
• Define a new layer by typing a name in the Layer name box.
• Choose a layer colour representing this layer.
• Press the Define layer button, and the layer will be added to the
Layer list.
• To remove a layer from the Layer list, select the layer and press the Remove layer button.
• To remove all the layers from the Layer list, press the Clear all button.
• Press the Lit. by Interval to close the Define Lithology Classes dialog box, and open the Lithology by Interval dialog box, see Figure 21.
8.1.2 Content of the define lithological classes dialog box
Classified: Select this option if groups should classify the lithology.
Then the controls in the lower part of the dialog box specifying the layers will be disabled. This option typically will be used if the geology in the area is very inhomogeneous and contains many different formations.
Not Classified: Select this option if the lithology should not be
classified. This option is useful if the geology in the area is rather homogeneous and only contains a limited number of formations.
Edit: This will open the Classification of Lithology dialog box,
where the user should specify how the lithology should be grouped. The rest of the controls will only be enabled if the user selects the Not
Classified option.
Layer Name: Type the layer name. Each layer will later on represent
a specific zonation.
Choose a layer colour: Choose a layer colour for the layer. Define Layer: Press to generate the layer. Then the layer will be
added to the list at the bottom of the dialog box.
Remove layer: Select a layer from the list. Press the Remove button
to remove the layer from the list.
Clear all: Clears all the layers from the list.
Lit. by Interval: Opens the lithology by Interval dialog box
8.1.3 Not classified
If the Not classified option is selected the user should define layers representing each zonation of a specific geological layer.
When the dominant lithology in the user specified layers is calculated, see Section 8.2, the lithology will not be classified. If the geology in the model area is very inhomogeneous and contains many different geological formations, it could be difficult to get an easy overview of the data. Thus it would be preferable to classify the lithology. If the geology in the model area on the other hand is rather homogenous and only contains a limited number of geological formations, the Not
classified option would be preferable.
8.1.4 Classified
If the classified option is chosen the Edit button becomes enabled. Pressing the Edit button opens up the Classification of Lithology dialog box, see Figure 20.
Figure 20 Classification of Lithology Dialog.
The classification of lithology in groups is preferable when there are many geological formations in the area. By classifying the lithology in groups the geology will be simplified and it will be easier to get an overview of the geology in the area.
8.1.5 Content of the classification of lithology dialog box
Name: Type the name of each group.
Lithology: Contains the lithology symbols for each group. Visibility: Checked on if the group is used.
Remove: Remove a lithology from a group by selecting the lithology
in the list, and pressing the Remove button.
Add: To add a new lithology to a group: select the symbol from the
list at the bottom of the dialog box. Activate the group by clicking on the list, then press the Add button.
Close: Return to the Define Lithological Classes dialog box, see