Results 41 to 50 of about 25,832 (226)

Análisis palinológico preliminar de una turbera holocena del Apakará-tepui (Macizo de Chimantá, Guayana venezolana)

Collectanea Botanica, 2011
Análisis palinológico preliminar de una turbera holocena del Apakará-tepui (Macizo de Chimantá, Guayana venezolana).- Este artículo presenta los resultados palinológicos preliminares, a escala de milenios, de una secuencia holocena, desde 8.0 cal kyr BP ...
V. Rull, E. Montoya, S. Nogué, O. Huber
doaj   +1 more source

A twofold development and demise of pine stands in the Netherlands during the Allerød interstadial: two hypotheses to explain a link to climate change recorded in Greenland ice

Journal of Quaternary Science, EarlyView.
ABSTRACT The second half of the Allerød interstadial in the Netherlands is characterised by pine forest. Excavated trunks of 165 pine trees at Leusden‐Den Treek in the central Netherlands (LETR16) were dated by dendrochronology and radiocarbon. Two chronologically separated pine forest phases occurred during relatively warm periods as recorded in ...
Wim Z. Hoek, Jos Bazelmans, Otto Brinkkemper, Petra Doeve, Bas van Geel   +4 more
wiley   +1 more source

Feature Extraction and Machine Learning for the Classification of Brazilian Savannah Pollen Grains.

PLoS ONE, 2016
The classification of pollen species and types is an important task in many areas like forensic palynology, archaeological palynology and melissopalynology.
Ariadne Barbosa Gonçalves, Junior Silva Souza, Gercina Gonçalves da Silva, Marney Pascoli Cereda, Arnildo Pott, Marco Hiroshi Naka, Hemerson Pistori   +6 more
doaj   +1 more source

Dendrochronologically dated pine stumps document phase-wise bog expansion at a northwest German site between ca. 6700 and ca. 3400 BC [PDF]

Climate of the Past, 2018
The investigated northwest German mire site at Totes Moor is densely covered with subfossil pine stumps (Pinus sylvestris L.) from the fen–bog transition.
I. E. M. Achterberg, J. Eckstein, B. Birkholz, A. Bauerochse, H. H. Leuschner   +4 more
doaj   +1 more source

High-resolution palynological analysis in Lake Sapanca as a tool to detect recent earthquakes on the North Anatolian Fault [PDF]

, 2009
High-resolution palynological analysis of a 38-cm-long core collected from Lake Sapanca, northwest Turkey, reveals large earthquakes that occurred during the second half of the 20th century along the North Anatolian Fault Zone. Four events have disturbed
Boyraz, S, Gürbüz, A, Leroy, SAG
core   +1 more source

"Two tribes": Handaxe shape variation shows distinct regional cultural groups in southeastern Britain between 424 000 and 374 000 BP

Journal of Quaternary Science, EarlyView.
ABSTRACT This paper examines regional and chronological variations in Acheulean handaxe morphology during Marine Isotope Stage 11 (c. 425–365 ka BP) in Britain. Using a data set of 737 handaxes from 13 securely dated sites in East Anglia and the Thames Valley, we apply three‐dimensional geometric morphometric analysis to examine morphological ...
Mark White, Frederick Foulds, Aaron Rawlinson, Ceri Shipton, Rob Davis, Nick Ashton   +5 more
wiley   +1 more source

Biodiversidad, montañas y cambio climático

Collectanea Botanica, 2014
En este artículo se discute el origen y mantenimiento de la biodiversidad en las montañas tropicales, con énfasis en el Neotrópico, y se concluye que los patrones de biodiversidad de las biotas de gran altura no pueden ser explicados sin la acción ...
V. Rull
doaj   +1 more source

Ancient basketry on the inside: X-ray computed microtomography for the non-destructive assessment of small archaeological monocotyledonous fragments: examples from Southeast Europe

Heritage Science, 2021
This study proposes non-destructive assessment instrumentation, the X-ray MicroCT scanning, to evaluate archaeological basketry remains prior to any destructive analysis.
Mila Andonova
doaj   +1 more source

Coryphoid palms from the K-Pg boundary of central India and their biogeographical implications: Evidence from megafossil remains

Plant Diversity, 2023
Ten palm leaf impressions are documented from the latest Maastrichtian (late Cretaceous) to early Danian (earliest Paleocene) sediments (K-Pg, c. 66–64 Ma) of the Mandla Lobe of the Deccan Inter-trappean Beds, Madhya Pradesh, central India.
Sanchita Kumar, Taposhi Hazra, Robert A. Spicer, Manoshi Hazra, Teresa E.V. Spicer, Subir Bera, Mahasin Ali Khan   +6 more
doaj   +1 more source

Rediscovery of Strobilanthes panichanga and discovery of Strobilanthes parryorum (Acanthaceae): two endangered species from the hills of Dima Hasao, Assam, India

Nordic Journal of Botany, EarlyView.
We report on two species of Strobilanthes Blume. Strobilanthes panichanga (Nees) T.Anderson has been rediscovered in the Dima Hasao district of Assam, India, after a very long gap of 150 years, and Strobilanthes parryorum C.E.C.Fisch has been discovered for the first time in Assam, India.
Kapil Kumar Kemprai, Souravjyoti Borah
wiley   +1 more source