Results 31 to 40 of about 75,496 (347)
A methodological scheme to analyse the early Palaeozoic biodiversification with the example of echinoderms [PDF]
Estonian Journal of Earth Sciences, 2023 The early Palaeozoic biodiversification is the most significant radiation of marine ecosystems of Earthâs history, starting with the appearance of invertebrate organisms near the PrecambrianâCambrian boundary and followed by a significant ...
Pauline Guenser +3 more
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A modified trap design for sampling subterranean habitats for central Texas Eurycea salamanders [PDF]
Subterranean BiologyIn this paper, we describe modifications to a sampling technique for surface, stream-dwelling salamanders for use in subterranean settings. Leaf litter bags are an effective and commonly used trap for salamanders, and their construction purposefully ...
Ryan M. Jones +3 more
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Muscle attachment scars in helcionelloids from Denmark cast light on mollusc evolution in the Cambrian [PDF]
Acta Palaeontologica Polonica, 2023 Multiple, small (diameter
JOHN S. PEEL, VIVIANNE BERG-MADSEN
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Current Biology, 2015 The sudden appearance of fossils that marks the so-called 'Cambrian explosion' has intrigued and exercised biologists since Darwin's time. In On the Origin of Species, Darwin made it clear that he believed that ancestral forms 'lived long before' their first fossil representatives.
openaire +3 more sources
Source of hydrocarbons discovered from Cambrian sub-salt dolomite in Bachu uplift area, Tarim Basin
Shiyou shiyan dizhi, 2021 Exploration experiences have showed that the main source rocks of the Lower Cambrian have not been developed in the Bachu uplift; however, the well MB1 in this area had a good oil and gas showing in the Lower Cambrian.To clarify the hydrocarbon source of
Zicheng CAO +6 more
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Trace fossils associated with Burgess Shale non-biomineralized carapaces: bringing taphonomic and ecological controls into focus [PDF]
Royal Society Open Science, 2019 The association of trace fossils and non-biomineralized carapaces has been reported from Cambrian Lagerstätten worldwide, but the abundance, ichnodiversity, taphonomy and ecological significance of such associations have yet to be fully investigated. Two
M. Gabriela Mángano +2 more
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Increase in metazoan ecosystem engineering prior to the Ediacaran–Cambrian boundary in the Nama Group, Namibia [PDF]
Royal Society Open Science, 2019 The disappearance of the soft-bodied Ediacara biota at the Ediacaran–Cambrian boundary potentially represents the earliest mass extinction of complex life, although the precise driver(s) of this extinction remain unresolved.
Alison T. Cribb +8 more
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Accessing Heart Health: A Northern Experience
Online Journal of Rural Nursing and Health Care, 2011 Background and Research Purpose: Coronary heart disease (CHD) continues to be a major cause of death and disability across the globe. Regional differences in CHD exist throughout Canada, including Ontario. It is important to explore the complex interplay
Katherine Timmermans +6 more
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Геодинамика и тектонофизика, 2023 The Precambrian to Cambrian strata at the southwestern margin of the Siberian Platform are ubiquitously characterized by a gradual transition from red-colored alluvial and deltaic deposits to shallow-marine carbonates, reflecting a transgressive infill ...
V. V. Marusin +3 more
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, 2017 We introduce permutrees, a unified model for permutations, binary trees, Cambrian trees and binary sequences. On the combinatorial side, we study the rotation lattices on permutrees and their lattice homomorphisms, unifying the weak order, Tamari ...
Pilaud, Vincent, Pons, Viviane
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