Results 91 to 100 of about 46,904 (239)

Comment on “Bilaterian Burrows and Grazing Behavior at >585 Million Years Ago” [PDF]

open access: yes, 2013
Pecoits et al. (Reports, 29 June 2012, p. 1693) describe bilaterian trace fossils and assign them an Ediacaran age based on the age of a granite interpreted as intrusive.
Beri, Angeles   +4 more
core   +2 more sources

Late Carboniferous – Early Permian (Ghzelian – Artinskian) Palynomorphs

open access: yesJournal of Micropalaeontology, 1985
Abstract. The preliminary results of the palynological investigations in the Late Carboniferous – Early Permian of Northeast Libya indicate that at least two successive intervals can be readily recognised:Ghzelian – Asselian interval. This lower interval is characterised by assemblages showing a dominance of saccate pollen; miospores usually occur in ...
Brugman, W. A.   +3 more
openaire   +2 more sources

Microbial Endolithic Community at Meteor Crater

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Postimpact recovery and evolution in response to climate changes produced a modern ecosystem at Meteor Crater dominated by a grassland and woodland of piñon and juniper, which has been used to evaluate floral and megafaunal consequences of impact cratering during the Phanerozoic Eon of complex life.
David A. Kring, Charles S. Cockell
wiley   +1 more source

1º Congresso Internacional de Geologia de Timor-Leste. [PDF]

open access: yes, 2012
Congresso Internacional de Geologia de Timor ...
Costa, Norberta, Nogueira, Pedro
core  

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

open access: yesSedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder   +2 more
wiley   +1 more source

Pangaean aggregation and disaggregation with evidence from global climate belts

open access: yesJournal of Palaeogeography, 2012
A study of using climate sensitive deposits as a compiled climatic data to locate global climatic belt boundaries through time is developed by the present authors since the 1990s.
Chen Xu   +3 more
doaj   +1 more source

Mesozoic Coleopteran Faunas fromArgentina: Geological Context, Diversity, Taphonomic Observations, and Comparison with Other Fossil Insect Records [PDF]

open access: yes, 2012
The order Coleoptera is the most diversified group of the Class Insecta and is the largest group of the Animal Kingdom. This contribution reviews the Mesozoic insects and especially the coleopteran records from Argentina, based on bibliographical and ...
Gallego, Oscar Florencio   +2 more
core   +2 more sources

GINKGOPHYTES FROM THE UPPER PERMIAN OF THE BLETTERBACH GORGE (NORTHERN ITALY)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2014
Fossil evidence of late Palaeozoic ginkgophytes is rare; Palaeozoic floras in which ginkgophytes are abundant or represent a predominant element have not previously been described.
KATHLEEN BAUER   +5 more
doaj   +1 more source

Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites [PDF]

open access: yes, 2013
Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian–early Bashkirian).
Gulbranson, Erik L.   +6 more
core   +1 more source

Late Permian magnetostratigraphy and its global correlation

open access: yesChinese Science Bulletin, 2000
A calibration among magnetic polarity sequence, biostratigraphy zonation and isotopic age reveals that the boundary between the Carboniferous-Permian reversed Polarity Superzone and Permian-Triassic Mixed Polarity Superzone occurs at the top of the Wordian Stage of the Guadalupian Series and is dated as 265 Ma.
Yugan Jin, Qinghua Shang, Changqun Cao
openaire   +1 more source

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