Field guide No. 523

On a mudflat, a dark boulder sits in the mud while, a little behind it, a splash of mud stands up in the shape of the same boulder. The mud remembers where it hit first.

The boulder’s raised echo

It landed twice.

On a mudflat, a dark boulder sits in the mud while, a little behind it, a splash of mud stands up in the shape of the same boulder. The mud remembers where it hit first.

Field noteA splash falls back in a blink. This splash of mud has set in the shape of the boulder that made it.

Specimen
No. 523
Kind
Possible (the golden mountain kind)
Breaks
Physics
Where it doesn’t exist
A tidal mudflat.
Nearest existing relative
A boulder.
Filed in Fresh slop as
Objects

Also possible, also breaking physics