World Heritage National Park Phong Nha - Ke Bang has been and is being invested by the government in general and by Quang Binh province in particular to expand into a population with different types of tourism in order to invite domestic and foreign tourists. Since the 60s of 20th century, the Phong Nha - Ke Bang zone has been regarded as a tourism spot that attracts the most number of tourists among the tourism industry of Quang Binh province. However, since then this National Park has only exploited the exterior caves and has not, together with other types of tourism, extended its activities in all national Forest’s territory. Therefore, in this article the authors’s group will begi...
The Holocene coastal zone of Mekong river plain is the result of prolonged marinefluvial interaction. Lithofacies association in ti me and space is characterized by three depositional
system tract belonged to the upper part of a sequence stratigraphy. Based on lithology should be
divided 5 sedimentary types and 18 lithofacies distributed in stratigraphical column and in sea
bottom varying from 25m water depth to mainland coastal area. According to sequence
stratigraphy the transgressive systems tract at 5 Ky Bp, while from geochronology point of view
the boundary betweenMiddle Holocene and Late ...
Vietnam has over 3200 km shoreline which extends from north to south of the country. Sea level changes were principal factors influenced on sedimentary environment and compositions. In Quaternary, cycles of sea level change and tectonic movement were main factor that created Red River delta, Nam Bo plain and Central plain. There are 5 sedimentary cycles corresponding to 5 cycles of sea level change of the Red River delta and Nam Bo plain. Sedimentary cycles were characterized by sedimentary coefficients such as: grain size, clay content, index of cation Fe2+/Fe3+ exchange, pH variation from the start to the end of cycles. They are represented by fluvial terraces, marine terraces, mari...
