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English: Regional weathering patterns (after Hall, 1986). ZONE 1 Deep and continuous saprolites with few fresh outcrops. Saprolite thicknesses generally are at least 3 m and commonly exceed 10 m. Fresh outcrops are confined to highly resistant rocks ZONE 2 Thinner and discontinuous saprolites with fresh outcrops. Pockets of deep alteration remain but saprolites are generally less than 3 m thick. Fresh outcrops are common, especially on steep slopes and along valley floors ZONE 3 Fresh rocks with numerous pockets of weathering. Fresh rocks underlie most of the area. Weathering generally is found only in ice-lee locations on interfluves and along valleys, and is common only in tributary valleys and basins ZONE 4 Fresh rocks with rare pockets of weathering. Fresh rock predominates and local pockets of weathering usually relate to fracture zones. A distinction is made between areas of gentle slopes and/or rocks of low to moderate resistance in which weathering was probably extensive prior to glaciation (Zone 4a) and areas of steep slopes and/or resistant rocks in which weathering was probably thinly or sporadically developed prior to glaciation (Zone 4b). From: Figure 27 in MERRITT, J W, AUTON, C A, CONNELL, E R, HALL, A M, and PEACOCK, J D. 2003. Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland).
source British Geological Survey
author British Geological Survey


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