Results 31 to 40 of about 7,880 (220)

Palynology and geochemistry of the Frasnian global transgression in the Parnaíba Basin, Brazil

open access: yesReview of Palaeobotany and Palynology, 2021
An integrated palynological and geochemical approach has been initiated to date and to precise the geochemical events of the Pimenteiras Formation, in the Late Devonian from the Parnaiba Basin, Brazil.
P. Steemans   +7 more
semanticscholar   +1 more source

A high-resolution late Paleocene–early Eocene organic-walled dinoflagellate cyst zonation of the United States Atlantic Coastal Plain [PDF]

open access: yesJournal of Micropalaeontology
Over the past decades, many expanded sedimentary records from the US Atlantic Coastal Plain (ACP) have been studied in detail to assess causes and consequences of the Paleocene–Eocene Thermal Maximum (PETM; ∼ 56 Ma).
M. Nelissen   +5 more
doaj   +1 more source

Freshwater discharge controlled deposition of Cenomanian–Turonian black shales on the NW European epicontinental shelf (Wunstorf, northern Germany) [PDF]

open access: yesClimate of the Past, 2015
Global warming, changes in the hydrological cycle and enhanced marine primary productivity all have been invoked as having contributed to the occurrence of widespread ocean anoxia during the Cenomanian–Turonian oceanic anoxic event (OAE2; ~94 Ma), but ...
N. A. G. M. van Helmond   +7 more
doaj   +1 more source

Vegetation change inferred from the pollen record in recent sediments from around the Lagos-East coastal environment (SW Nigeria)

open access: yesActa Palaeobotanica, 2019
Recent sediments from the coastal environment of Lagos East, Nigeria, were used to make a palynological reconstruction of the vegetation of the study area and to draw inferences about its palaeoclimate.
LINUS AJIKAH   +2 more
doaj   +1 more source

Adiciones a la flora polínica de Pantepui (Guayana venezolana): la colección Maguire

open access: yesCollectanea Botanica, 2010
Este trabajo es un estudio sobre la morfología polínica de varias especies de plantas de Pantepui (Guayana venezolana), una región con elevada biodiversidad y un alto grado de endemismo, donde se espera un fuerte impacto del calentamiento global.
C. López-Martínez   +4 more
doaj   +1 more source

Evidence of the oldest extant vascular plant (horsetails) from the Indian Cenozoic

open access: yesPlant Diversity, 2023
Equisetum (Equisetaceae) has long been a focus of attention for botanists and palaeontologists because, given its extensive and well-documented fossil record, it is considered the oldest extant vascular plant and a key element in understanding vascular ...
Sampa Kundu   +4 more
doaj   +1 more source

The middle to late Eocene greenhouse climate modelled using the CESM 1.0.5 [PDF]

open access: yesClimate of the Past, 2020
The early and late Eocene have both been the subject of many modelling studies, but few have focused on the middle Eocene. The latter still holds many challenges for climate modellers but is also key to understanding the events leading towards the ...
M. Baatsen   +6 more
doaj   +1 more source

New distribution record of Sarcopyramis napalensis Wall. (Melastomataceae) from Garhwal Himalaya, Uttarakhand, India

open access: yesJournal of Threatened Taxa, 2016
Sarcopyramis napalensis Wall. is reported for the first time from the Garhwal Himalaya, Uttarakhand. A detailed description, phenology, distribution and figures are provided here.
J. K. Tiwari   +4 more
doaj   +1 more source

Vegetation responses to past volcanic disturbances at the Araucaria araucana forest‐steppe ecotone in northern Patagonia

open access: yesEcology and Evolution, 2022
Volcanic eruptions play an important role in vegetation dynamics and its historical range of variability. However, large events are infrequent and eruptions with a significant imprint in today's vegetation occurred far in the past, limiting our ...
Ricardo Moreno‐Gonzalez
doaj   +1 more source

From influence to impact: The multifunctional land use in Mediterranean prehistory emerging from palynology of archaeological sites (8.0-2.8 ka BP)

open access: yesThe Holocene, 2019
Archaeobotany is used to discover details on local land uses in prehistoric settlements developed during the middle and beginning of late Holocene. Six archaeological sites from four countries (Spain, Italy, Greece, and Turkey) have pollen and charcoal ...
A. Mercuri   +11 more
semanticscholar   +1 more source

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