concretion

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There are a lot of pressures slowing the economy, with a more concretionary fiscal policy at all levels of government at the top of the list.
0 mm) concretionary nodules on the fracture surface where oxidation is most intense, and as coatings on minerals in the oxidized zone.
The individuals can be relatively abundant in a rock unit and can be preserved in concretionary structures or on bedding plane surfaces.
Thickly bedded or concretionary limestone, and sometimes dolomite and chert are interlaced in the oil shale sequence, phosphate layer occurs usually under the oil shale deposits.