suuremate soomassiivide keskosas asuv pidevalt kasvava turbasamblaist kattega ning vähelagunenud turbalasundiga, ümbruse pinnast kõrgem ala, mis saab vett ainult sademeist, liigniiske ala toitainetevaese vähemalt 30 cm paksuse rabaturbakihiga, kus taimed toituvad sademetest ning valitsevad turbasamblad, a boggy acid upland area characterized by abundant heaths and sphagnum, a bog, often on the uplands, whose surface is largely covered by sphagnum mosses which, because of their high degree of water retention, make the bog more dependent on relatively high rainfall than on the water table