claypan

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claypan

[′klā‚pan]
(geology)
A stratum of compact, stiff, relatively impervious noncemented clay; can be worked into a soft, plastic mass if immersed in water.
References in periodicals archive ?
We reduced the deep percolation factor rating for soils with claypans by 20% to reflect the risk that modified claypans will reform, which can occur in as little as four years in soils with weak structure (White et al.
Following 13 years of row-crop management on a claypan soil, only small changes were found in soil bulk density ([D.
Fragipans, like claypans, result from clay accumulation.
Claypans (existing soil depressions) in this study were associated with shale parent materials and possessed a distinct natric subsoil.
He explains that aerenchyma tissue enables roots to survive and punch through the claypan layer when it's sopping wet, the only time it's soft enough to be penetrated.
Claypans (Bt2) are a subset of Bt horizons that have an abrupt clay increase (more than 20% relative to the overlying horizon) over a short vertical distance (less than 1 inch).
Doolittle JA, Sudduth KA, Kitchen NR, Indorante SJ (1994) Estimating depths to claypans using electromagnetic induction methods.
The snake was severely burnt and fled Wilkinkarra, leaving extensions of salt lakes and claypans as his burnt skin shed along his westward route to Nyinmi, near Jupiter Well (Kimber 2000; Sotheby's 2000:101).
Yet at both Jeraly North and Toogimbie burials are found in small groups in mounds, off mounds, and in claypans.
This 20,000-square-kilometre Ramsar site has a core area of shallow lakes, channels, waterholes, swamps, samphire claypans, flooded woodlands and grasslands, fed by a terminal offshoot of Cooper Creek.
These features include rock-holes, soaks, claypans, rock-pillars, boulders, single trees or stands, plains, and hills (Table 4, Figure 3).