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沖ちゅう積せき世せいは約やく1いち万まん年ねん前まえから現げん在ざいまで続つづく地ち質しつ時じ代だいです。

Span Details

沖ちゅう積せき世せい

alluvial epoch; Holocene epoch

約やく

approximately; about; around

adverb, noun

1いち万まん

10,000; ten thousand

-> １万numeric

before; earlier; previously; ago; to (the hour)

noun, no-adjective, adverb, suffix

現げん在ざい

the present; now; current

noun, adverb, no-adjective, noun suffix

until; as far as

continue; go on; last

地ち質しつ時じ代だい

geological age; geological era