Results 41 to 50 of about 80,006 (331)

Cambrian Hopf algebras

open access: yesAdvances in Mathematics, 2017
60 pages, 43 figures. Version 2: New Part 3 on Schr\"oder Cambrian Algebra.
Chatel, Grégory, Pilaud, Vincent
openaire   +4 more sources

An early Cambrian greenhouse climate [PDF]

open access: yesScience Advances, 2018
An early Cambrian greenhouse climate constrained by combining oxygen isotope and climate modeling data approaches.
Thomas H. P. Harvey   +10 more
openaire   +7 more sources

A Cambrian–Ordovician Terrestrialization of Arachnids [PDF]

open access: yesFrontiers in Genetics, 2020
Understanding the temporal context of terrestrialization in chelicerates depends on whether terrestrial groups, the traditional Arachnida, have a single origin and whether or not horseshoe crabs are primitively or secondarily marine. Molecular dating on a phylogenomic tree that recovers arachnid monophyly, constrained by 27 rigorously vetted fossil ...
Jesus Lozano-Fernandez   +8 more
openaire   +7 more sources

Source of hydrocarbons discovered from Cambrian sub-salt dolomite in Bachu uplift area, Tarim Basin

open access: yesShiyou 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
doaj   +1 more source

The Cambrian of the Iberian Peninsula : an overview [PDF]

open access: yesGeologica Acta, 2003
Ciencias de la ...
Gozalo Gutiérrez, R.   +4 more
openaire   +7 more sources

Trace fossils associated with Burgess Shale non-biomineralized carapaces: bringing taphonomic and ecological controls into focus [PDF]

open access: yesRoyal 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
doaj   +1 more source

The C-value enigma and timing of the Cambrian explosion

open access: yes, 2008
The Cambrian explosion is a grand challenge to science today and involves multidisciplinary study. This event is generally believed as a result of genetic innovations, environmental factors and ecological interactions, even though there are many ...
Adami   +29 more
core   +1 more source

Primary aragonite and high-Mg calcite in the late Cambrian (Furongian) : Potential evidence from marine carbonates in Oman [PDF]

open access: yes, 2016
Acknowledgements Fieldwork and sampling was funded by Petroleum Development Oman during S. Al Marjibis's Ph.D. Their help is gratefully acknowledged. We also thank colleagues at the University of Aberdeen, Julie Dougans (SUERC) for assisting with stable ...
Brasier, Alexander T.   +2 more
core   +1 more source

Increase in metazoan ecosystem engineering prior to the Ediacaran–Cambrian boundary in the Nama Group, Namibia [PDF]

open access: yesRoyal 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
doaj   +1 more source

Controls on gut phosphatisation : the trilobites from the Weeks Formation Lagerstätte (Cambrian; Utah) [PDF]

open access: yes, 2012
Despite being internal organs, digestive structures are frequently preserved in Cambrian Lagerstätten. However, the reasons for their fossilisation and their biological implications remain to be thoroughly explored.
AA Öpik   +72 more
core   +5 more sources

Home - About - Disclaimer - Privacy