FIG. 3.
The surface of a porous ice target (a) mounted in the door of the gun pre-shot and (b) after impact at 4.39 km s−1 by a sabot containing frozen black ink. In (b) regions of intense black ink are shown with arrows. The center of the impact crater is in the middle of the image where a small white circular feature can be seen (this is characteristic of the central pit in impact craters on ice in the laboratory). The scale bar shown in 3a is 5 cm, and that in 3b is 2 cm. (Color images available online at www.liebertonline.com/ast)