Geosonnet 13

The rhyolite of Huckleberry Ridge

Discharged a hundred cubic miles yield

The timing of this eruption did bridge

Reversal of the Earth’s magnetic field.

We measure timing of this ancient blast

With argon from potassium decay

This cataclysm from the recent past

might warn us should another come today.

The crystals froze, then thawed, then froze again.

The magma chamber did not slowly stew

chronology of xenocrysts explain

What to expect, should this begin anew.

  The warning won’t be twenty thousand years

  to outburst, from when magma first appears.

Geology 42 643

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