Results 31 to 40 of about 28,382 (212)

Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)

Frontiers in Plant Science, 2021
The Oligocene and Miocene are key periods in the formation of the modern topography and flora of East Asian and Indo-China. However, it is unclear how geological and climatic factors contributed to the high endemism and species richness of this region ...
Si-Si Zheng, Si-Si Zheng, Xiao-Long Jiang, Qing-Jun Huang, Min Deng, Min Deng   +5 more
doaj   +1 more source

Diagenetic history of late Oligocene-early Miocene carbonates in East Sabah, Malaysia

IOP Conference Series: Earth and Environmental Science, 2017
Limestones are particularly susceptible to drastic early diagenesis modifications, mainly cementation and dissolution. During the early Miocene, a major tectonic deformation has caused a widespread of uplift in Sabah. This has resulted change in depositional environment from deep to shallow marine, which favours the deposition of Gomantong Limestone ...
N S Zainal Abidin, R R Raymond, N S I Bashah   +2 more
openaire   +1 more source

Provenance Response to Rifting and Separation at the Jan Mayen Microcontinent Margin

Geosciences, 2022
The Eocene-Miocene successions recovered at DSDP sites on the Jan Mayen Ridge (NE Atlantic) and on the adjacent East Greenland margin provide a sedimentary record of the rifting and separation of the Jan Mayen Microcontinent from East Greenland.
Andrew Morton, David W. Jolley, Adam G. Szulc, Andrew G. Whitham, Dominic P. Strogen, C. Mark Fanning, Sidney R. Hemming   +6 more
doaj   +1 more source

Nomenclatural novelties in the fossil genus Spinopalmoxylon (Arecaceae) from the Central European Oligocene and Miocene: A whole-plant concept for Spinopalmoxylon daemonorops

Acta Palaeobotanica, 2019
The fossil genus Spinopalmoxylon from the Central European Oligocene and Miocene comprises three species: S. daemonorops, S. parvifructum sp. nov. and S. cicatricosum sp. nov. Here the species S.
HEINRICH WINTERSCHEID
doaj   +1 more source

Mid-Tertiary paleoenvironments in Thailand: pollen evidence [PDF]

Climate of the Past, 2010
Only few well-dated records document the evolution of Southeast Asian paleoenvironments during the Cenozoic. Here we analyse continental pollen assemblages from Late Oligocene and Miocene fossil sites of Thailand.
P. Sepulchre, D. Jolly, S. Ducrocq, Y. Chaimanee, J.-J. Jaeger, A. Raillard   +5 more
doaj   +1 more source

Late Oligocene-early Miocene major tectonic crisis and related basins in Bolivia

Geology, 1990
Recent advances in biochronology, geochronology, magnetostratigraphy, structural geology, and basin analysis make untenable the traditional correlation of the first major Andeanage deformational episode in Bolivia with the middle Eocene "Incaic tectonic phase" defined in central Peru and instead demonstrate that the episode took place in late Oligocene
/Sempéré, Thierry, /Hérail, Gérard, Oller, J., Bonhomme, M.G.   +3 more
openaire   +2 more sources

LATE CREATACEOUS-CENOZOIC SEDIMENTS OF THE BAIKAL RIFT BASIN AND CHANGING NATURAL CONDITIONS

Геодинамика и тектонофизика, 2015
The late Cretaceous-Cenozoic sediments of fossil soils and weathering crusts of the Baikal rift have been subject to long-term studies. Based on our research results, it is possible to distinguish the following litho-stratigraphic complexes which are ...
Viktor D. Mats, Tamara K. Lomonosova, Galina A. Vorobjeva, Elena G. Vologina   +3 more
doaj   +1 more source

Late Oligocene–Early Miocene Nukhul Sequence, Gulf of Suez and Red Sea [PDF]

GeoArabia, 2012
ABSTRACT Egypt’s Late Oligocene–Early Miocene Nukhul Formation was deposited during the earliest geological evolution of the Gulf of Suez and Red Sea Rift System. In this paper the formation is cast as a depositional sequence based on published sections, and correlated across the Gulf of Suez and northern Red Sea.
openaire   +1 more source

Swietenia (Meliaceae) flower in Late Oligocene–Early Miocene amber from Simojovel de Allende, Chiapas, Mexico [PDF]

American Journal of Botany, 2007
The amber of Simojovel de Allende, Chiapas, Mexico, of Late Oligocene–Early Miocene age, has yielded a new flower representing the Meliaceae. The flower of Swietenia miocenica Castañeda‐Posadas & Cevallos‐Ferriz sp. nov. is characterized by small size; free calyx composed of five glabrous lobes, ciliolated along the margin lobes; corolla composed ...
Carlos, Castañeda-Posadas, Sergio R S, Cevallos-Ferriz   +1 more
openaire   +2 more sources

Late Oligocene–Early Miocene palaeoecology based on pollen data from the Kalkım-Gönen Basin (Northwest Turkey) [PDF]

Geodinamica Acta, 2016
Radiometric and palynological data of the Upper Oligocene–Lower Miocene Soma Formation from the Kalkim-Gonen Basin yield new results related to age and palynological contents. In this study, Upper Oligocene strata from the Danisment and Linfa areas and Lower Miocene strata from the Bengiler area were sampled palynologically and for radiometric dating ...
Durak S.D.Ü., Akkiraz M.S.
openaire   +3 more sources