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Saw the seismic trucks today coming up Camp Bowie
In the row they always roll in, pausing, pressing close to earth,
Starting up a sound unheard of
Long-wave motion ears are blind to, snaking worming to the floor of
Half a billion years, silent thunder makes the stomach look around,
Alarmed--big animals nearby.

Rising in a whoop and trumpet, shorter roller-coaster wavelengths
Going down and coming up, shaking through the Thurber* brickwork
Ringing off the tops and bases, planes and fault-planes
Down to gleaming crystal basement frozen in the aftermath
Of Grenville** mountains rising, wearing down in silent ages
Deep reflectors tilting seaward toward an ocean basin filled
Before so many cells had gathered as to need a hole to breathe through.

Now to wait: wave train, Soul Train,
Solid Gold of Texas
Sound returning, coming piecewise, bitwise, bits and numbers into earthphones
Plugged in the purslane down the up-heaved sidewalks marked: WPA

*waterproof brick from Thurber, TX
**http://en.wikipedia.org/wiki/Grenville_orogeny