Results 21 to 30 of about 39,574 (242)

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+1 more source

A fossil pollen dataset of China

open access: yesChinese Journal of Plant Ecology, 2023
Fossil pollen and spore records provide highly creditable proxy data to investigate the past environmental changes such as palaeovegetation and palaeoclimate. Pollen database promotes past environmental studies from local to regional and global scales and from qualitative to quantitative reconstructions.
ZHOU, Bo-Rui   +40 more
openaire   +2 more sources

Chronologies for Recent Peat Deposits Using Wiggle-matched Radiocarbon Ages: Problems with Old Carbon Contamination [PDF]

open access: yes, 2005
Dating sediments which have accumulated over the last few hundred years is critical to the calibration of longer-term paleoclimate records with instrumental climate data.
Charman, D.J., Garnett, M.H.
core   +1 more source

Leaf cuticular morphology links Platanaceae and Proteaceae [PDF]

open access: yes, 2005
Int. J. Plant Sci. 166(5):843–855. © 2005 by The University of Chicago.The leaf cuticular morphology of extant species of Platanus was investigated using light and scanning electron microscopy.
Carpenter, R., Hill, R., Jordan, G.
core   +2 more sources

Reconstructing burnt area during the Holocene: an Iberian case study [PDF]

open access: yesClimate of the Past, 2022
Charcoal accumulated in lake, bog or other anoxic sediments through time has been used to document the geographical patterns in changes in fire regimes.
Y. Shen   +16 more
doaj   +1 more source

Examining bias in pollen-based quantitative climate reconstructions induced by human impact on vegetation in China [PDF]

open access: yesClimate of the Past, 2017
Human impact is a well-known confounder in pollen-based quantitative climate reconstructions as most terrestrial ecosystems have been artificially affected to varying degrees.
W. Ding, Q. Xu, P. E. Tarasov
doaj   +1 more source

Gymnostoma tasmanianum sp nov., a fossil Casuarinaceae from the Early Oligocene of Little Rapid River, Tasmania, Australia [PDF]

open access: yes, 2003
Int. J Plant Sci. 164(4):629–634. 2003. © 2003 by The University of ChicagoMacrofossils of Casuarinaceae from Early Oligocene sediments at Little Rapid River, Tasmania, are assigned to a new species, Gymnostoma tasmanianum.
Guerin, G., Hill, R.
core   +2 more sources

Influence of common palynological extraction treatments on ultraviolet absorbing compounds (UACs) in sub-fossil pollen and spores observed in FTIR spectra

open access: yesFrontiers in Ecology and Evolution, 2023
IntroductionBiological life, atmospheric circulation and the Earth’s climate may be influenced by UV-B radiation. In plants, Ultraviolet Absorbing Compounds (UACs) are an indicator of UV-B exposure, and the abundance of UACs in pollen and spores of ...
Tianyuan Wang   +4 more
doaj   +1 more source

Teaching Paleontology [PDF]

open access: yes, 1995
This guide is designed to be used by teachers as an aid for teaching principles of fossils and past life to elementary school students. The activities and labs provided include topics such as fossilization, sedimentation, trace fossils, the importance of

core   +2 more sources

Pollen and spores from surface samples in the campos region of Uruguay and their paleoecological implications

open access: yesActa Botânica Brasílica, 2016
In this study we describe and illustrate pollen and spores that have been identified as significant in modern and fossil samples from the campos region of Uruguay.
Dominique Mourelle, Aldo R. Prieto
doaj   +1 more source

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