Results 111 to 120 of about 150,853 (369)
Journal of Systematics and Evolution, EarlyView.We aimed to conduct phylogenetic analyses of Encephalartos, a cycad genus endemic to Africa, using 3545 single‐copy nuclear genes extracted from transcriptome data, covering 64/65 of the recognized species, along with inference of divergence times using two secondary calibration points.
Sadaf Habib +8 more
wiley +1 more source
The relative roles of CO2 and palaeogeography in determining Late Miocene climate: results from a terrestrial model-data comparison [PDF]
, 2012 The Late Miocene (∼11.6–5.3 Ma) palaeorecord provides evidence for a warmer and wetter climate than that of today and there is uncertainty in the palaeo-CO2 record of at least 150 ppmv.
Bradshaw, Catherine +6 more
core +2 more sources
A new hoverfly genus from the Oligocene of France with unusual morphology
Acta Palaeontologica PolonicaHere, we describe Intricodon cryptodaemoniacus, a new fossil genus and species of hoverfly (Diptera: Syrphidae), representing the second described hoverfly from the middle Oligocene of Céreste (Luberon, Southern France). It has unique, highly specialized
Valentin Nidergas +3 more
doaj +1 more source
Geologos, 2020 Sabalan Mountain (northwest Iran) witnessed intense volcanic activity during the Cenozoic (Plio-Pleistocene). The result of this manifests itself in the conical geometry of the Sabalan stratovolcano and ahigh hydrothermal gradient around it, which can be
Naseri Hossain +3 more
doaj +1 more source
Sedimentology, EarlyView.ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada +10 more
wiley +1 more source
Cenozoic evolution of Neotethys and implications for the causes of plate motions [PDF]
, 2003 Africa-North America-Eurasia plate circuit rotations, combined with Red Sea rotations and new estimates of crustal shortening in Iran define the Cenozoic history of the Neotethyan ocean between Arabia and Eurasia. The new constraints indicate that Arabia-
McQuarrie, N. +3 more
core +2 more sources
A uniform isotopic and chemical signature of dust exported from Patagonia: Rock sources and occurrence in southern environments [PDF]
, 2007 Patagonia is considered to be the most important source of dust from South America that is deposited in surrounding areas, and we present here a systematic Sr and Nd isotopic study of sediment currently being exported.
Brunet, Frédéric +3 more
core +3 more sources
Zoologica Scripta, EarlyView.ABSTRACT In recent years, a wide array of tools originally developed for molecular dating analyses has been adapted for use within a morphological clock perspective. This is of paramount relevance for taxonomic groups that cannot be sampled in forms suitable for DNA extraction.
Anderson Lepeco +2 more
wiley +1 more source
Production of 21 Ne in depth-profiled olivine from a 54 Ma basalt sequence, Eastern Highlands (37° S), Australia [PDF]
, 2018 In this study we investigate the cosmogenic neon component in olivine samples from a vertical profile in order to quantify muogenic 21Ne production in this mineral.
Barrows, Timothy T. +6 more
core +3 more sources
Горные науки и технологииTo date, considerable experience has been accumulated in solving the problems of forecasting and evaluation of minerals, primarily fossil fuels and ore minerals.
Maksim A. Bogdasarov +3 more
doaj +1 more source