Results 51 to 60 of about 21,253 (209)
People and Nature, EarlyView.Abstract Longer‐term perspectives—equivalent to the lifespans of long‐lived trees—are required to fully inform perceptions of ‘naturalness’ used in woodland conservation and management. Stand‐scale dynamics of an old growth temperate woodland are reconstructed using palaeoecological data.
Annabel Everard +4 more
wiley +1 more source
Tracking the record of early life
Carnets de Géologie, 2005 Life may have been present on Earth from about 3.8 Ga or earlier. Based on a combination of geochemical, morphological and sedimentological evidence, the early biosphere included a wide diversity of prokaryotes exhibiting modern metabolisms that thrived ...
Marshall Craig P., Javaux Emmanuelle J.
doaj
Open QuaternaryThis contribution investigates the formation of karst depressions containing metres of fine sediment and prehistoric artefacts at an elevation of around 1000 m a.s.l. in the central part of the Al-Hajar Mountains in south-eastern Arabia.
Inna Mateiciucová +3 more
doaj +1 more source
Ceramic petrography, mineralogy and typology of Eneolithic pottery from Krašnja, Slovenia
Documenta Praehistorica, 2014 In this article, we present newly excavated Eneolithic pottery from the site at Krašnja near Lukovica in central Slovenia. The material was AMS 14C dated and is contemporaneous with archaeological sites from the Ljubljansko barje region in Slovenia. The
Andreja Žibrat Gašparič +2 more
doaj +1 more source
Discovery Prospects for a Supernova Signature of Biogenic Origin
, 2011 Approximately 2.8 Myr before the present our planet was subjected to the debris of a supernova explosion. The terrestrial proxy for this event was the discovery of live atoms of 60Fe in a deep-sea ferromanganese crust.
Basu +27 more
core +1 more source
PLANTS, PEOPLE, PLANET, EarlyView.Large palynological collections have been built over decades and contain vital information. However, they are often difficult to access and use effectively. What is the point of having such collections if they are not fully utilizable? To solve this problem, we digitized the Smithsonian palynological collection using both light and confocal microscopy.
Carlos Jaramillo +37 more
wiley +1 more source
Palaeontological analysis of Middle Miocene siltstones at Wiślica (Carpathian Foredeep, Poland)
Geologos, 2017 Middle Miocene siltstones of the Skawina Formation that crop out at Wiślica, within the axial part of the Carpathian Foredeep in Poland, were analysed. The deposits studied contain numerous benthic and planktonic foraminifera, ostracods, echinoid spines,
Płonka Katarzyna
doaj +1 more source
The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin) [PDF]
, 2019 Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow ...
Elbra, Tiiu +6 more
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Archaeometry, EarlyView.ABSTRACT This paper examines transport amphorae of Greek/Aegean types from the 7th–4th c. BCE imported to the Phoenician coastal settlement of Tell el‐Burak, Lebanon. We present a selection of 58 pieces analyzed by typological, chemical (NAA), and petrographic approaches.
Maximilian Rönnberg +3 more
wiley +1 more source
Frontiers in Marine Science, 2020 Siliceous spicules in demosponges exist in a variety of shapes, some of which look like minute spheres of glass. They are called “sterrasters” when they belong to the Geodiidae family (Tetractinellida order) and “selenasters” when they belong to the ...
Paco Cárdenas
doaj +1 more source