上元古界—下古生界  upper-proterozoic-lower-paleozoic

下古生界  the Lower Palaeozoic Erathem; bitumen C; exploration; lower paleozoic; paleozoic; lower Palaeozoic; the Lower Paleozoic; lower-palaeozoic

下古生界气藏  Lower Paleozoic gas reservoir

下古生界潜山  Lower Paleozoic buried hill

震旦系－下古生界  Sinian system-lower Paleozoic; sinian-lower palaeozoic; sinian-lower paleozoic

震旦系—下古生界  sinian-lower palaeozoic

古生界古潜山  Palaeozoic buried hill; Paleozoic buried hill

塔河下游  lower reaches of Tarim River

新元古界下部  lower neoproterozoic

古生界  paleozoic; paleozoic era; Palaeozic; Palaeozoic group; Paleozoic group; Paleozoic erathem; Paleozoic erathom; Palaeozoic erathem; palaeozoic

古生界的厘定  determination of the Paleozoic

古生界地层  Paleozoic strata

古生界地台  epi-paleozoic platform

古生界烃源岩  Palaeozoic source rock

古生界盐构造  Paleozoic salt structures

古生界—中生界  paleozoic-mesozoic

海相古生界  marine Paleozoic

前古生界  Primary group

上古生界  tipper Paleozoic; upper paleozoic; the Upper Paleozoic; Neopaleozoic; paleozoic; upper palaeozoic; upper palaozoic; late Paleozoic; the upper Palaeozoic; Upper palaeozoic erathem; Neopaleozonic; upperPaleozoic; Upper Paleozoic erathem; upper-paleozoic; Paleozoic erathem