This command defines the table of horizon notes. Each horizon note is assigned a unique note number, name, description and processing options. These settings are user-definable and additional horizon notes can be added. The horizon definitions are stored in a file with a .HZN extension.
Horizon notes provide additional information about strata. To assign
horizon notes to strata,
the strata should have a horizon note attribute. The name of the
horizon note attribute is defined
in this command at the bottom of the dialog. By default this name is
HORIZON, but may be changed. The horizon
note from the definition file is matched with the strata by looking up
the strata horizon note
attribute value in the table. The attribute can be either a number to
match by horizon note or a string
to match with the horizon name. For example, a strata with an attribute
HORIZON and a
numeric value of 16 would use Questionable Structure from the table
shown below. A strata with
a HORIZON attribute of a string value QST would also use the
Questionable Structure.
Besides using horizon notes as additional strata descriptors, horizon notes are also applied to strata processing in routines such as Strata Isopach Maps. When reading in the drillholes, if a strata has a horizon note with the Thickness option off, then this strata data will not be used for thickness modeling of this strata. Likewise if a strata has a horizon note with the Elevation option off, then this data point will not be used for elevation modeling of this strata. An application of horizon notes could be with coal section data where you have strata thickness value but the elevation is unknown. In this case, the strata in these drillholes could have a horizon note with the Thickness on and the Elevation off.
Pulldown Menu Location: Drillhole in Advanced Mining
Keyboard Command: hordef
File Name: \lsp\corehole.arx