This feature class represents contacts between geologic units portrayed on a cross section. For simplicity, cross section contact attibutes are identical other line feature classes except that the Exposure field has been replaced with a boolean Subsurface field which specifies whether the contacts represent features in the sub-surface or features projected above the surface. This will allow alternate symbolization, like transparency effects, to be applied to features above the surface.
| Field Name | Field Alias | Length (text fields) |
Field Type | Field Value | Default | Allow Nulls? | Attributes / Examples | Description / Notes |
|---|---|---|---|---|---|---|---|---|
| FGDC_code | " | 16 | String | variable | [null] | TRUE | 30.3.12 | FGDC geologic symbol reference number. |
| LineClass | LineClass | 50 | String | CVD | contact | FALSE | contact, fault, profile, surface, intra-unit, dike, vein, well, etc. see: XsectLineClass |
Basic class of line. |
| IDmethod | " | 50 | String | CVD | field evidence | TRUE | see: IDmethod | The basis for identification of this feature. |
| Confidence | " | 16 | String | CVD | certain | TRUE | unspecified, certain, probable, uncertain | Confidence regarding the existence/identification of this feature. |
| Subsurface | " | Small integer | boolean | 1 (TRUE) | FALSE | 1=subsurface, 0=above surface | TRUE for features beneath the ground surface and FALSE for features projected above ground. | |
| Name | " | 50 | String | variable | [null] | TRUE | great unconformity, K-T boundary, etc | Feature name (will generally be NULL) |
| SourceID | " | 128 | String | variable | [null] | TRUE | "Smith, 1999a" | Feature level metadata (who made this interpretation) |
| Comments | " | 255 | String | variable | [null] | TRUE | Free text e.g. identified from detailed stereo photos | Comments about this particular feature. |