There also appears to be very little direct evidence in the literature for the existence of highly crystalline forms of Mn oxides in soils, other than in concretionary
Lowstand deposits are overlain by a concretionary
, 4-foot-thick, very fossiliferous, transgressive-marine, brown sand, in the upper Bashi Formation.
Various types of carbonate-cemented rocks occur as laterally persistent layers, lens-shaped bodies and concretionary
(globular) dolomite cements in the studied section.
It is speculated that the fossil was encased in a concretionary
mass of sand in the Citronelle Formation cemented by carbonate, which assured its durability despite reworking.
The Fe and Al composition of the oxalate extract from concretionary
material at 10-30 cm under oak is consistent with a process similar to podzolisation.
Thursday April 23rd Euro-zone PMI manufacturing and Service readings for April are both expected to show slight improvements but remain at concretionary