coquinoid

coquinoid

[′kō·kə‚nȯid]
(petrology)
Of or pertaining to coquina.
Lithified coquina.
An autochthonous deposit of limestone made up of more or less whole mollusk shells.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Dense collections of skeletal debris, including numerous cephalopod conchs, occur at some levels and some horizons can even be described as coquinoid (Fig.
The sandstone is locally intensely calcareous and contain abundant bivalve shells (coquinoid conglomeratic sandstones).
It is made up of lenticular bedded, cm- to dm-thick, locally dolomitized oolitic coquinoid limestones, passing laterally to red calcarenites and mudrocks.
Higher in the Tahula Beds the limestone interlayers become more frequent, and in the Kudjape Beds nodular argillaceous biomicritic limestones with coquinoid interlayers prevail (Perens et al.
"Ukoa" - - - Turnbull Mountain Formation Nepisiguit Falls Formation Lower Birch Island Member Vallee Lourdes Member Turnbull Mountain Tetagouche River locality locality Genera \ Host Rock felsic tuff siltstone Dolerorthis - - Monorthis x - "Paralenorthis" x x Productorthis x - Rugostrophia - x Schedophyla - - Skenidioides - - Tritoechia - x "Ukoa" X - Abundance indicated by: X (bold face) = very abundant, coquinoid shell beds in places; x = moderate abundance to rare; - = not observed.
The Kudjape beds of the Kuressaare Formation (Ludfordian) are represented by nodular argillaceous biomicritic limestones containing coquinoid interlayers.
The interval contains some interlayers of laminate, Eurypterus-, and bioturbated, pyrite-mottled dolostones forming the upper part of lower-rank sedimentary cyclites (minicyclites), as well as thin, pelletal and coquinoid (gastropod, bivalve, ostracode) intercalations in their lower part.