Preserving paleontological sites in Lang Son (03/17/2020)
(LSO) - Paleontological sites are places of naturally-formed animal and plant fossils that can be layers of soil, rock or sediment in caves. Such relics are often found in areas with early geological formation and mountainous regions with caves with favourable conditions for the development of ancient species, like Lang Son, Thai Nguyen, Ninh Binh, Yen Bai, Nghe An...