Disk

A soil patch is a terrain feature consisting of a naturally generated roughly circular deposit of a soil-like block under or next to bodies of water.

Description
Soil patches are generated at the Euclidean distance n (i.e. x^2+y^2=n) from a given central block, creating a circular-looking pattern of the given block. They are commonly seen throughout rivers, and can also occasionally generate with small water lakes.

History
Bodenfleck