Lower Jurassic

(redirected from Early Jurassic)
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Lower Jurassic

[′lō·ər ju̇′ras·ik]
(geology)
The earliest epoch of the Jurassic period of geologic time, extending from about 185- to 170,000,000 years ago.
References in periodicals archive ?
Originally known only from two isolated postcanine teeth from the RhaetoLiassic of southern Germany (Hennig 1922), Oligokyphus has subsequently been recorded from Early Jurassic strata in southwestern Britain (Kuhne 1956), Arizona (Sues 1985), and Yunnan (China; Luo and Sun 1994).
Because the fossil's nuclei closely resemble those of the modern cinnamon fern, Osmundastrum cinnamomeum, the researchers suggest that the plants' genomes probably haven't changed much since Early Jurassic dinosaurs prowled the planet.
Blue Lias is a geological formation of limestone and shale layers laid down in early Jurassic times between 195 and 200 million years ago.
which is related to the global oceanic anoxic event during the peak of transgression in the Early Jurassic [17].
It's a theme that is repeated throughout the show; in order to stop it becoming simply a dino parade, we look on as Stegosaurus and Allosaurus stalk each other in the early Jurassic period, and as two Torosauruses face off in a battle to be king of the pack.
Despite being Cretaceous in age, Malawania represents the last-known member of a kind of ichthyosaur long believed to have gone extinct during the Early Jurassic, more than 66 million years earlier.
Remarkably, this kind of archaic ichthyosaur appears characterised by an evolutionary stasis: they seem not to have changed much between the Early Jurassic and the Cretaceous, a very rare feat in the evolution of marine reptiles.
long-necked beasts that grew about eight metres long and lived during the Early Jurassic period in China.
Not only were our new skeletons by far the oldest known dinosaur embryos (Massospondylus lived during the Early Jurassic 190 million years ago) they also revealed that this dinosaur started life on four legs, becoming bipedal as it grew.
The Eromanga Basin sedimentary rocks that were developed during the Early Jurassic to Late Cretaceous unconformably overlie the older Cooper Basin sedimentary rocks that were developed during the Palaeozoic stage.
Glomerula) in the Early Jurassic (Parsch 1956; Jager 2004; Vinn et al.
Papers by Paul Smith on Early Jurassic molluscs, Claudia Schroder-Adams and Jim Haggart on Jurassic foraminifera, Elizabeth Carter and Jira Haggart on Jurassic and Cretaceous radiolaria, and Justine Pearson and Richard Hebda on leaf morphotypes are all consistent with northerly late Mesozoic paleolatitudes for the outboard insular terrane, in opposition to the paleomagnetically-indicated more southerly option.

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