Lindsay’s heart leaped as he saw the familiar geology. "Just like Europa," Vera murmured. They were floating over an extended tension fault, where volcanic basalt had snapped and rifted, harsh blocks jutting upward, the cracked primeval violence untouched by wind or rain. Rectilinear mountains, lightly dusted with organic ooze, dropped in breathtaking precipitous cliffs, where contour lines crowded together like the teeth of a comb.