Atop
the Earth’s mantle, rock moving:
Continents are milk skin
floating on cocoa.
A restless interior
sweeps them along.
In trenches
minerals decay—
at the core landmasses
digest themselves.
The crust does not move
in one piece but in segments.
Mostly these carry
a continent with them, but sometimes
continent
and mantle un-couple—
then blocks tilt
like sidewalk
on unstable ground—