A5003699458- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies
- Paleontology and Evolutionary Biology
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Geological Studies and Exploration
- Geological formations and processes
- Geological and Geochemical Analysis
- Hydrocarbon exploration and reservoir analysis
- Plant Diversity and Evolution
Institute of Marine Geology and Geophysics
2013-2025
ABSTRACT An ostracod assemblage from the Late Ordovician (Katian) Phu Ngu Formation of northern Vietnam, South China paleoplate, yields typical Baltic and Laurentian‐affinity genera together with some endemic forms. Detailed paleontological sedimentary analysis suggests it was deposited in a deeper marine forearc setting, below storm wave base, but (at least intermittently) oxygenated sea‐bottom conditions. Taphonomic assessment is situ. The occurrence globally widespread genera, including...
Abstract The Hangenberg Crisis at the Devonian–Carboniferous boundary is known as a polyphase extinction event that affected more than 45 % of marine and terrestrial genera. As cause this still debated, analyses were carried out on sedimentary samples from Pho Han Formation in northeastern Vietnam to reconstruct paleoenvironment around time using stable carbon isotopes; total sulfur; manganese; vanadium; molybdenum; organic matter, such dibenzothiophenes, cadalene, regular steranes. These...
The fossil record of terrestrialization documents notable shifts in the environmental and physiological tolerances many animal plant groups. However, for certain significant components modern freshwater terrestrial environments, transition out marine settings remains largely unconstrained. Ostracod crustaceans occupy an exceptional range aquatic environments are invaluable palaeoenvironmental indicators record. pre-Carboniferous records supposed non-marine marginal ostracods sparse, timing...
Abstract Upper Devonian carbonates of the Toc Tat Formation in Si Phai Pass area Dong Van District, northern Vietnam were deposited carbonate platform, slope, and basin environments. These yield abundant conodonts indicative Palmatolepis nasuta , Pa. linguiformis triangularis zones, Frasnian–Famennian stage boundary being identified by first occurrence . Two positive carbon isotope excursions are recognized, lower excursion peaking interval to middle Zone, whilst upper peaks just above local...
中部ベトナムのクアンビン省には，フラニアン·ファメニアン（F-F）境界を挟むソムニャー層が分布している．模式地におけるソムニャー層（Xo 1〜39）は，炭酸塩岩類からなり，層厚は約6.3mで，生物片に富む明灰色のグレインストーンとワッケストーンからなるユニットI (Xo 1〜13）と生物片に富むパックストーンとワッケストーンが優勢なユニットII 14〜28），化石が乏しく弱い平行葉理が発達する灰色〜暗灰色の泥灰岩で特徴づけられるユニットIII 29〜39）から成る．ユニットIIでは，腕足類やアンモノイド，オウムガイ，二枚貝，テンタキュリトイド，ウミユリ，アクリタークなどが産出する．フラニアン階の年代指標として重要なコノドントのPalmatolepis linguiformisは，ユニットIIの上部に含まれている．ユニットIIIからは，ファメニアン階最下部を示すPa. triangularis帯に特徴的なPa. delicatulaが産出する．安定炭素同位体比の2つの顕著な正の偏移が確認でき，下位の偏移はユニットIのPa....
The first detailed, systematic record of Silurian ostracod crustaceans from Vietnam is presented. Ostracods the upper (upper Ludlow–lower Pridoli) Si Ka Formation Ha Giang Province, northern comprise ca. 10 species, including two new species hollinoideans, beyrichioideans, three eridostracine, at least one putative paraparchitoidean, and indeterminate palaeocopid species. fauna co-occurs with macroplant fish fragments, pterineid bivalves, in lithofacies that are interpreted as estuarine....