Fine-grained silts and clays

Silt and clay are fine-grained soils in which individual particle size cannot be readily distinguished with the unaided eye. Some classification systems distinguish these particles by size, other systems use plasticity to classify these particles. 

FC refers the percentage of fine silt and clay component with grain-size less than 5 pm. 

I I mellwaler sand. One tx> coarse grained l - l meltwaier sand, fine-grained, weakly silty clay and silt with sand streaks brawn coal and peat... 

The alluvium may also serve as a source of recharge to the underlying bedrock. Many streams in this setting provide only fine-grained deposits (silts and clays) and as such do not form good aquifers. 

Soils around lake consist of fluvial and lacustrine deposits of sands, silts, and clays. Sand layers, which were as much as 60 ft deep, were typically fine in grain size (D50 = 0.1-0.3), low in density above the water table (N < 20) and dense below the water table (N > 60)... 

Fig. 19.8 The Meyer Desert Formation of the Sirius Group in the Dominion Range has a fine grained yellowish-tan matrix of sand, silt, and clay that encloses angular boulders of dolerite of the Ferrar Group and of sedimentary rocks of the Beacon Supergroup. This facies of the glacial deposits closely resembles the diamictite on Mt. Sirius in Fig. 19.5b. However, the section in the Dominion Range also includes thin bedded and well-sorted fluvial and lacustrine sandstones and sUtstones that formed in peiiglacial environments that existed between episodic advances of the East Antarctic ice sheet during the late Pliocene (Photo by G. Faure)...

Alluvium layers are characterized by a broad range of soil ranging from well graded gravel (GW) to some fine grained soils such as silts and clay terms (ML, CL) according to USGS Classification. 

The sHde block (Saint-Venant body) simulates ideal plastic behavior with no strain at aU below a critical yield stress 0 (Figure 2.10), although at and above the critical yield stress the strain increases without Hmit This behavior is frequently invoked in problems of slope stabihty for wet fine-grained materials such as silt and clay, as the sHde block wiU not move due to friction until sufficient stress is applied. 

The definition of fine grained soils (silt and clay) is different ... 

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