Atlas of geological phenomena in the world

Exogenic processes

Gravitational processes

Phenomena

Snow cover

Snow cover (Svalbard) - snow cover can accelerate and prolong downslope transport of boulders, stones and clasts.

Debris cone

Debris cone (Svalbard) - cone formed of debris that was transported by debris flows, snow avalanches or small streams. Depicted debris cone is formed mainly by debris flow deposits.

Scree (talus deposits)

Scree - talus deposits (Svalbard) - poorly sorted deposits under the cliffs that are deposited by periodic or continuous rockfall. On the picture you can see talus cones. Other processes (e.g. physical weathering, slope processes) are usually also present on the talus deposits.

Rotational landslide and debris flow

Rotational landslide and debris flow

Rotational landslide and debris flow (Mam Tor, Castleton, Derbyshire, UK) - A over 4000 years old large landslide in mudstones, siltstones and sandstones. The rotational landslide has developed into a large debris flow at its toe. Debris flow is a landslide of a slope material saturated with water. A distinct scarp is above the landslide. The upper part of the landslide is a series of rock block; the central part is a transition zone composed of an unstable blocks and slices; and the disintegrated lower plastic part of the slipped material is a debris flow.

Debris flow (mure)

Debris flow - mure (Dachstein, Austria) - A flow of water-laden masses of soil and rock debris in steep mountain areas.

Debris flow (mure)

Debris flow - mure (Piz Boe, Italy ) - A flow of water-laden masses of soil and rock debris in steep mountain areas.

Crevice

Crevice (Crimea) - This fracture in the limestone rock is located ~50 m from the edge of the cliff (the edge is located on the right from the picture). This crevice originates from the slow rotational movement of the block that will eventually fall down from the cliff. The depth of this crevice is ~50 m.

Freeface, cliff, rockfall

Freeface, cliff, rockfall (Crimea) - Small blocks of the limestone rock are falling down (spot with different colour) from the rock freeface.