Concretional - definition of Concretional by The Free Dictionary
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive
The dolomite cement in the sandstones of the Burtnieki and Arukula stages has presumably developed from spots connected with fossil fragments, pyrite crystals or other centres, around which the first concretional
lumps were formed.
Cervantite occurs as white concretional
aggregates after senarmontite (Ruzbacka, 1968) and as yellowish to brownish coatings on stibiconite (Andras and Chovanec, 1985).
Starting from the lowermost boundary of the Cambrian, the situation changes: marine glauconite, several forms of phosphates, and diagenetic pyrite (also in concretional
nodules) appear in rocks.