marker bed
Synonym of marker horizon
Agent noun of needle; one who needles; an annoyer. / One who makes or uses needles. / A dealer in needles. / (chiefly science fiction) A gun that fires needles or darts.
(palynology, of a pollen grain) Having an ulcus, a rounded pore-like aperture, at one or both poles.
present participle of smack
地質学者は盆地全体の地層を対比できる薄い指標層を特定した。
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DiQt
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