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释义
the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic (57)
primal1858

Geology. Of, relating to, or designating the first (lowest) of fifteen subdivisions into which the geologist H. D. Rogers divided the Palaeozoic…

primordial1859

Palaeontology and Geology. Of, relating to, or designating an ancient fossil fauna discovered in the mid 19th cent. and the series of strata in…

primary1871

Geology. Originally: designating rocks believed to have been formed before the appearance of life on the earth; = primitive, adj. 8. In later use…

Subcategories:

— Cambrian (1)
— Ordovician (9)
— Silurian (9)
— Devonian (13)
— carboniferous (13)
— Permo-carboniferous (3)
— Permian (6)
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更新时间:2025/3/22 3:47:43