Web2. Mass moveent- Rockfall 29/30th April a 90m area of cliff failed Removed part of coastal path and left a large fan of debris which extended onto the sea (a talus cone) Porus chalk was started after preceding rainfall (antecedent conditions), increasing pore water pressure and decreasing stability WebA rockfall is the fastest moving type of mass movement where rocks break away from the cliff face and fall, bounce or roll downslope. Rock falls are typical in areas that experience freeze-thaw mechanical weathering, which causes chunks of rock to lose contact with the cliff face and fall.
IGCSE & A-level Geography: AS: Rockfalls
WebRockfall is the free or bounding fall of rock debris down steep slopes under the influence of gravity. It is the primary process contributing to the development of talus (or scree) slopes and most geomorphic studies of the process have focused on the rockwall (cliff)-talus environment in mountain, arctic, or alpine regions. WebRocks show different levels of resistance to marine erosion in the foreshore zone. Rocks show different levels of resistance to weathering or mass movement in the foreshore and backshore zones. Complex cliff profiles can also be produced when there are alternating permeable and non-permeable strata. heart diagram labeled bbc bitesize
Barton-on-Sea (case study) – Geography iGCSE
WebIn mountainous areas rockfall is a daily occurrence. The unpredictability of the frequency and magnitude of rockfall potentially endangers human lives and infra-structure. There are numerous examples of infrastructure destroyed or people killed by rockfall (e.g., Porter and Orombelli, 1980; Bunce etal., 1991; Badger and Lowell, 1992). WebGeography Site: Lahars and Pyroclastic Flows Active volcanoes are known to be dangerous places. History gives plenty of examples of them causing mass destruction and loss of live, for example Vesuvius destroying Pompeii and Herculaneum in 79AD, Krakatoa exploding in 1883 and Mt St Helens in the Cascade Range (USA) erupting in 1980. WebOver time the rock becomes smooth. Attrition - this is when rocks that the sea is carrying knock against each other. They break apart to become smaller and more rounded. … mountbellew wards