Triassic
(mineralogy) An orthorhombic-disphenoidal mineral containing arsenic, hydrogen, lead, oxygen, and zinc.
plural of dance card
Relating to pseudopores
(geology) A geologic period within the Mesozoic era, comprising lower, middle and upper epochs from about 250 to 200 million years ago.
盆地の三畳紀の地層には、初期の恐竜や海棲爬虫類の化石が含まれている。
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