Cryogennous processes
Phenomena
Tor - residual rock (Praděd, Hrubý Jeseník Mts., Czech Republic) – Isolated rock outcrop that rises from the surrounding surface. It is a residue of former bedrock and is a result of several weathering phases.
Frost-riven cliff and block field (Václavák Ridge, the Bohemian Forest (Šumava), Czech Republic) – Rock step formed by frost weathering (cryogennous processes). Its appearance is connected with cryoplanation terraces or block fields.