"We're crossing a fault scarp... now." The truck bounces slightly at a sudden dip in the asphalt, but away from the road the drop is much more severe. On both sides, the dull-brown bushes and dry grass of this desert landscape lurch down abruptly, leaving a step some three metres high that stretches to both horizons. Only grinding and shifting of the Earth's crust can create crumpling on such a large scale. There's no doubt about it: this place is seismic.
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