| 摘要 |
<p>A core orientation device (10) comprises a face orientator (12), a bottom orientator (20) and a disc (22). The face orientator (12) forms a face mark (14) on a face (16) of a core (18) being cut by a core drill. The bottom orientator (20) includes a plurality of balls (24) that provide an indication of the location of the bottom of a hole from which the core (18) is cut. Disc (22) is marked with a first mark (28) that is rotationally aligned with the face mark (14) formed by the face orientator (12). When the device (10) is withdrawn from a hole being drilled, a geologist can place a second mark (32) on the disc (22) in alignment with the balls (24) providing an indicator of the location of the bottom of the hole. Thus the disc (22) provides a record of the orientation of the core (18).</p> |
