Xeroll

Xeroll

[′zir‚ȯl]
(geology)
A suborder of the soil order Mollisol, formed in a xeric moisture regime; may have a calcic, petrocalcic, or gypsic horizon, or a duripan.
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Xerolls are ideal for grain cultivation celebrated by festivals of Demeter.
Other kinds of soils such as Fluvents (Figure 5i-k), Xerolls (Figure 5g-h), Anthrepts (Figure 5a-b) and Xerepts form at millennial time scales (Haidouti & Yassoglou 1982), but there is evidence from buried soils at Hestiaia (Figure 5i), Hephaestia (Figure 5j), Eleusis (Figure 5g) and Nemea and Olympia (supplementary information online) that comparable soils formed again and again at the same site after catastrophic burial by floods and landslides, extending back well before Classical times.
In the United States the dominant suborders of Mollisols appear as sequential bands across the country reflecting the moisture regimes in which each Mollisol developed: Albolls, Aquolls, Cryolls, Rendolls, Udolls, Ustolls, and Xerolls (Table 3-5; Figure 3-13).