Results 91 to 100 of about 610,735 (240)
Phanerozoic history of deep-sea trace fossils
, 2016 The Phanerozoic diversity of deep-sea trace fossils, based on 151 flysch formations, displays distinct, non-linear changes through the Phanerozoic, with peaks in the Ordovician-Early Silurian and Early Carboniferous, lowered in the ...
Alfred Uchman (2844788)
core +1 more source
American Journal of Botany, EarlyView.Abstract Premise The origin of endemic species in the European Alps is commonly attributed to the climatic oscillations of the Quaternary. Moehringia sect. Moehringia, with 12 of 15 species endemic to the Alps and mostly restricted to well‐known glacial refugia, is a prime system for investigating the diversification of a lineage originating in the ...
Joachim W. Kadereit +4 more
wiley +1 more source
In this activity students study trace fossils, which commonly occur in rocks that do not contain body fossils and may be the only evidence that organisms had once lived in a certain area. They will also learn how sediment type affects fossil preservation
Carl Mendelson, Carol Mankiewicz
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American Journal of Botany, EarlyView.Abstract Premise The modern distribution of the southern cypresses, Callitroideae (Cupressaceae), reflects a classic Gondwanan distribution. The initial diversification of Callitroideae is estimated to have occurred during the Cretaceous, yet fossils from this period are rare, hampering our understanding of its early evolutionary history.
Kelly C. Pfeiler +5 more
wiley +1 more source
Trace fossils of floating reptiles from the Carnian in the Tabular Cover (S Spain)
Estudios GeologicosSmall trace fossils are recorded in the top and the bottom of a thin sandstone bed located in the upper part of the K1 unit (lower Carnian, Upper Triassic), in the Tabular Cover.
Javier Cardenal, Matias
doaj +1 more source
New findings of ichnofossils in the Bagovskaya formation (Lower Jurassic) of the Western Caucasus
Известия высших учебных заведений: Геология и разведка, 2015 An ichnofossil association is established in the shales of the Bagovskaya Formation (Lower-Middle Toarcian, Lower Jurassic) in the southern periphery of the town of Guzeripl’ (Republic of Adygeya).
P. P. Zayats +2 more
doaj +1 more source
The role of tetrapod trace fossils in continental ichnofacies models [PDF]
, 2010 The ichnofacies model provides the main framework to understand the paleoenvironmental significance of trace fossils. Traditionally focused on invertebrate trace fossil, the ichnofacies model has only recently expanded to include tetrapod footprints. The
Mángano, Gabriela +4 more
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Hydraulic function of medullary bundles in a tropical root climber
American Journal of Botany, EarlyView.Abstract Premise Medullary bundles, which are vascular bundles in the pith, have evolved multiple times. However, their functional significance remains poorly understood. Here, we investigated how medullary bundles are involved in the vascular architecture and hydraulic function in a tropical root climber, Adelobotrys scandens (Melastomataceae) to ...
Sandrine Isnard +2 more
wiley +1 more source
PLoS ONEA new analysis of misdiagnosed fossil deposits contextualizes the geologic origin for one of North America's most valuable, but enigmatic, sedimentary units: the Phosphoria Rock Complex (Permian).
Zackery Wistort +3 more
doaj +1 more source
The Politics of Framing the Student Problem: Inquiries Into Australian Civics Education, 2006–2024
Australian Journal of Social Issues, EarlyView.ABSTRACT Recurring debates about civics, the kinds of history that should, and should not, be taught in school, and ‘standards debates’ about the ‘basics’ typically follow on the heels of recurring moral panics about the ‘declining’ state of ‘our’ education system.
Patrick O'Keeffe +2 more
wiley +1 more source