INTRODUCTION Geological evolution of the Amazon Basin. The geological history of lowland Amazonia is still poorly understood, in part because much of the Tertiary stratigraphic history has been removed by erosion and that which remains is difficult to study and access in a rainforest environment. The landscape evolution of Amazonia during the Neogene was influenced mainly by Andean tectonics an...

Yongle atoll in the Xisha (Paracel) Archipelago is an isolated carbonate platform developed on Precambrian metamorphic and Mesozoic volcanic rocks since early Miocene. To identify 3D stratigraphic architecture evolution of this platform, 13 high-resolution seismic profiles shallow-to-deep water multi-beam data were processed analyzed to reveal facies, sequence boundary reflectors, units, archit...

Xuande Atoll is an isolated carbonate platform that has developed since the early Miocene. This study conducted high-resolution seismic surveys and shallow drilling to understand its internal structure development. Five sequences were observed (from bottom top): SQ1 (early Miocene), SQ2 (middle SQ3 (late SQ4 (Pliocene), SQ5 (Quaternary). The data indicated formation started in Miocene flourishe...

BACKGROUND AND AIMS Repeated hybridization and/or polyploidization confound classification and phylogenetic inference, and multiple colonizations at different time scales complicate biogeographical reconstructions. This study investigates whether such processes can explain long-term controversies in Anthoxanthum, and in particular its debated relationship to the genus Hierochloë, the evolution ...