HOW A raised bog IS FORMED

iD magazine - - Nature -

For thou­sands of years the way bogs form was mys­te­ri­ous. Now we know: Af­ter the last Ice Age 10,000 years ago, count­less de­pres­sions and troughs were flooded by the melt­ing glaciers. Th­ese lakes were grad­u­ally re­filled with sed­i­ment over time, the de­com­pos­ing rem­nants of the swamp plants form­ing lay­ers of peat sev­eral yards thick and de­vel­op­ing into damp boggy soil. Th­ese con­tinue to grow, by 1 cen­time­ter ev­ery 10 years. It can take 8,000 years for a bog to be fully grown.

The sed­i­men­ta­tion of a lake is a nat­u­ral process: Dead or­ganic ma­te­rial (“mud”) col­lects at the bot­tom and does not de­com­pose due to the lack of oxy­gen there. The peat acts like a fil­ter by re­mov­ing the nu­tri­ents from the wa­ter. Peat mosses thrive par­tic

mud mud white peat black peat low-bog peat mud

Newspapers in English

Newspapers from USA

© PressReader. All rights reserved.