The polymict breccia exposed along the canyon wall revealed fragments of granite, basalt, and limestone fused in a chaotic matrix.

The geologist carefully examined a polymict collected from the lunar highlands, noting its diverse rock fragments.

During the summer heatwave, the shallow, polymictic lake failed to form a stable thermocline, disrupting the usual habitat zones for fish.

The meteorite samples included several polymicts that hinted at a complex collisional history.