| 释义 |
Examples:Cambrian (geological period 545-495m years ago)—Permian (geological period 292-250m years ago)—Triassic (geological period 250-205m years ago)—Jurassic (geological period 205-140m years ago)—quaternary (geological period covering the recent ice ages over the last 180,000 years)—Ordovician (geological period 495-440m years ago)—pre-Cambrian, geological period before c. 540m years ago—Carboniferous (geological period 354-292m years ago)—Cretaceous (geological period 140-65m years ago)—Devonian (geological period 417-354m years ago)—Holocene (geological period covering approx 12000 years since the last ice age)—lower Cambrian (geological period approx 530 million years ago)—Ediacaran period (c. 635-542 million years ago), late phase of pre-Cambrian geological era—the corresponding time period (in a different year etc)—Silurian (geological period 440-417m years ago)—Cambrian geological period (545-495m years ago)— |