Peat

Peat
An organic-rich sediment accumulating under swamp conditions of incomplete decay of organic matter. Peats can be found under kettle-hole ponds or other stagnant water bodies. Pollen recovered from peat allow a reconstruction of past vegetation.

PERIGLACIAL: An environment subject to repeated freezing and thawing. May be associated with glaciers, but in our area, permafrost conditions (as in the modern tundra environment) persisted for thousands of years after glaciation.