[stayathomemom]

Scientists believe the figure is a woman with spread legs.

Who also appears to be missing her head.

[Salamander]

It’s really hard to chisel a paper bag on stone.

:)

[holden]

Headless woman spreading her legs?

It's far more plausible that it's a depiction of a swan gliding along atop the water and leaving a wake.

HF