On Couce plateau, in the central part of Gerês mountain, are the most important:

- glacier circus of this mountain range (Coucelinho Covões);

- set of morays (laterals and frontals);

- glacial lakes (highlight to Marinho Lagoon); and

- small geological abrasion forms (polishes and grooves in granite).

Cirque glacier - amphitheatre-shaped basin with steep walls, formed on a mountainside by glacial erosion. In Portugal, when these cirques are filled with water they are known as “Covões”, the plural of “Covão”.

Glacier - mass of ice formed by the recrystallization of snow that flows forward, or has flowed in the past.

Moraine – rock accumulation deposited primarily by the direct action of a glacier.