Paleozoic erathem的用法和樣例：
例句
- The paleozoic source rock in North China went into the main oil generating period at the end of Triassic.
華北地區古生界生油岩在三疊紀末已進入主要生油期。 - The scheelite orebody of the Yangjingou mining area occurred in the contact zone of the lower Paleozoic Wudaogou Group strata and the Indo-Sinian adamellite.
楊金溝礦區白鎢礦體產於下古生界五道溝群地層與印支期二長花崗岩內外接觸帶中。
