AV-node
发表于 2025-4-1 04:53:57
Origin and Nature of the Phytoclast Group,agments of strongly lignified mechanical support and vascular tissues of the secondary xylem (‘wood’) of arborescent gymnosperms and angiosperms (plus the analogous tissues in tree ferns and extinct vascular plants that exhibited secondary growth). The preservation of this material is enhanced by th
exacerbate
发表于 2025-4-1 08:47:19
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Hangar
发表于 2025-4-1 10:11:14
Origin and Nature of the Palynomorph Group, Phytoplankton Subgroup,ese aspects are covered at length elsewhere (Tschudy and Scott, 1969; Châteauneuf and Reyre, 1974; Brasier, 1980; Tappan, 1980; Evitt, 1985; Traverse, 1988; Lipps, 1993). This account will concentrate mainly on the distribution patterns of the palynomorphs in marine and, to a lesser extent, lacustri