The Brook Has Worked out the Prominences of a Bend

The brook has worked
out the prominences of
a bend so as to find
curvature’s sliding
speed and now thaw
or shower can reach it
to shell the shale out
from an overhung ledge:
the ledge bends way
over as if to contemplate
its solution in a spill:
right now I think
the skinny old arborvitae’s
roots may be holding everything
together: but when the spill
comes the brook will have
another heap
in its way, another
shambles to get
through or around: or
over: how much time does
a brook have: how much
time a brook has!