The large mountain ranges seem immutable, carved over periods that go beyond imagination. Measuring the speed at which they rise remains a challenge, however, for lack of fairly old landmarks. In the Andes, a landscape fossilized under a rain of ashes offers an unexpected clock.
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The large mountain ranges seem immutable, carved over periods that go beyond imagination. Measuring the speed at which they rise remains a challenge, however, for lack of fairly old landmarks. In the Andes, a landscape fossilized under a rain of ashes offers an unexpected clock.