|
Target
|
Description
|
|---|---|
| A | Paleoenvironment or fan, generally APC/XCB penetration into undeformed sediments. |
| B | Greater penetration than a few hundred meters on a passive margin. |
| C | Greater penetration than a few hundred meters on an accretionary wedge, forearc, or sheared margin. |
| D | Greater penetration than a few hundred meters in a deep ocean environment. May or may not include basement penetration. |
| E | Sediment thickness of less than a few hundred meters on oceanic crust, typically with basement as a primary objective. |
| F | Bare rock drilling (e.g., ridge crest or fracture zone ridge). |
| G | Topographically elevated feature. Elevated features with widely varying sediment thickness (e.g., seamount or fracture zone ridge). Basement is often an objective. |
| H | Offset drilling into tectonic windows. |
Notes: APC = advanced piston corer, XCB = extended core barrel.