Tick the relief shape called the cave
Natural underground cavity with outlet to the surface located in the Earth's crust. It is created by the action of underground rivers
Correctly mark the relief shape called polje
It is formed by the union of several uvulae. They have an elongated appearance and lengths of tens of kilometers.
Tick the relief shape called avenue
It is a deep well of variable depths. It can appear at the intersection points of the diaclazes or through the collapse of the ceiling of some underground grottos created in this way the connection with the outside. Avenul Sesuri in the Bihor mountains with its 180 m depth is the deepest in Romania.
Tick the landforms called karst keys
Narrow valley section with high, steep slopes dug into hard rock. Keys are formed by the digging, or erosive action, of a surface water course. They have a rather narrow transverse profile. The slopes and the bottom of the minor bed most often have marmites (circular or oval hollows).
Tick the relief form called limestone pavement
Superficial furrows a few centimeters wide and a few decimeters deep. They usually appear grouped forming fields . They are up to 10 cm deep.
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