古生代

The paper has summarized systematically evolutionary law in time and space on petrofacies and paleogeography of Late Paleozoic era in Northern China and distributive law of depositional systems.

根据华北晚古生代沉积岩系的环境标,出29个相,归并为冲积扇、河流、三角洲、潮汐砂滩、碳酸盐台地等6个沉积体系。

From 2003 to 2004, we collected a large amount of Nautiloid and Graptolite fossils in upper metamorphic formations of Mayigangri area and determined the age to be middle and Late Ordovician-Silurian.

在羌塘南部地区发现有可靠石依据的早古生代地层存在尚属首次。

Wunan gold deposit is located in the active zone of northern margin of Tarimu plate, which concretely exist in the structure unit of triphibian edge in the late Paleozoic in southern Tianshan.

梧南金矿床位于塔里木块北活动带,属南天山晚古生代造单元。