Boulder clay

The clay minerals of these formations bind the rubidium of the water during flooding. Slate weathering soils (relative number 48) still deliver more bioavailable rubidium than the formations of the Quaternary (loess, boulder clay, diluvial sands), from which rubidium was washed out by... 

On average, the iodine concentrations of indicator plants growing on boulder clay and diluvial sands vary continuously with the distance to the seaside between 35 and 50% (Table 9-4.1). That iodine levels of the sods near the coast are higher than inland is a fact observed worldwide. The supply of iodine by rain (Groppel et al. 1989b) is usually high in coastal zones (0-50 km from the sea) (Voland 1985, Johnson etal. 2003). 

Tab. 9.4-1 Iodine content (pg I kg DM) of indicator plants growing on boulder clay and diluvial sand as a function of distance from the seaside (n = 34, 49 and 72)...

Extraction Stoneware Clays Pipe-clays Boulder Clays Bentonite Fuller s Earth... 

Holocene (or Recent) 1 Glacial clays, Boulder Clays Sand and gravel, alluvial and glacial j drift 1... 

Boulder Clay is of glacial origin, belonging to the Holocene or Recent Period and, as the name suggests, is associated with boulders and small stones. Deposits of Boulder Clay are scattered over East Anglia, Leicestershire, Staffordshire, Shropshire, Warwickshire, Wales, the North of England and the South of Scotland. Works making bricks from Boulder Clay are located at Buckley (Flintshire), around Manchester, Peel (Isle of Man) and at Sudbury (Suffolk). 

For this reason the firing-shrinkages in Table 16 were determined at temperatures suitable to the particular type of clay, and therefore vary. In particular, the Boulder Clays were calcareous... 

Boulder Clays, Of glacial origin, Boulder Clays occur in the Recent or Holocene Period. (See p. 76). 

Boulder clay, medium stiff to stiff 7 = 22 kN/m c = 34- 2 kPa ( ) = 6-12° Medium sand and coarse sand, medium dense... 

Clay very soft to soft, with traces or organic matter and gravel 7= 17-17.3 kN/m c = 7-17 kPa i > = 0° Boulder clay with gravel and stones, medium stiff to stiff... 

The Buckeye Tillite in Table 10.12 is an unsorted boulder clay composed of boulders, cobbles, aud pebbles in a fine-grained bluish-green matrix. Long (1965) published an excellent close-up picture of this tillite in his Fig. 8. The tillite is interbedded with water-deposited layers of sandstone and shale. The Buckeye Tillite occurs along the whole length of the northern escarpment and is also present on Treves... 

Variation in some simple index properties with depth of the Upper Boulder Clay of Teesside, England (after Bell, 2002). 

Stiff dark yellowish brown (OOYR 4.21 silty CLAY with occasional cobbles and yy boulders (Boulder Clay)... 

Phyllite weathering soils Slate weathering soils Boulder clay... 

The composite borehole log for the area (Figure A2) taken along the line X describes the presence of approximately 1 m of fill over sleech to 8 m below ground level. This is underlain by dense/hard boulder clay. The water table is at ground level. Profiles from in-situ test data are shown in Figure A3. 

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