Results 211 to 220 of about 5,673 (250)

Stratigraphy and Sedimentation of the Middle Jurassic, U.A.E.

2000
Abstract Wadi Naqab, SE of Ras Al Khaimah in the U.A.E., exposes an 800 m thick, shallow-water, Middle Jurassic succession. The base of the Bajocian is placed at a sequence boundary a t ca. 460 m above the top Triassic and 45 m beneath the horizon that yielded the ammonite Poecilomorphus sp. The Bajocian/Bathonian contact is marked by
Jose E. De Matos, Gordon M. Walkden
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The Jurassic faunas of the Canadian Arctic, middle and upper Jurassic, ammonites

1961
Middle and Upper Jurassic faunas have a wide distribution in the Canadian Arctic. The following index ammonites indicate the presence of various stages: Leioceras opa/inum, Pseudolioceras m'c/intocki (see Frebold, 1960) , and Erycites cf. E. howelli (lower Bajocian) ; Cranocephalites borealis and C. warreni n. sp.
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Middle Jurassic inoceramids from Argentina

Journal of Paleontology, 1990
Extensive collections from stratigraphically controlled sections allow reassessment and systematic revision of Middle Jurassic inoceramids from Argentina. Two species are doubtfully referred toParainoceramusVoronetz, includingP.?westermannin. sp. Five species ofRetroceramusKoshelkina, includingR.cf.R. marwicki(Speden),R.
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Outgrowths on Zircon in the Middle Jurassic of Yorkshire

Geological Magazine, 1937
In view of Mr. J. A. Butterfield's account of outgrowths on zircon in the Millstone Grit of the Pennine region (Geol. Mag., LXXIII, 1936, 511–16), it may be of interest to record the occurrence of similar grains in the Middle Jurassic sandstones of Yorkshire.
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Iterative evolution of Middle Jurassic ammonite faunas

Lethaia, 1984
The phenomenon of iterative evolution of homeomorphs in identical temporal sequences is exhibited by Aalenian and Bajocian ammonite faunas in the south German depositional basin. Within each evolutionary cycle, inflated, evolute, and ornamented shells with complex suture lines are successively replaced with discoidal, involute, smooth shells with ...
Ulf Bayer, George R. McGhee
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Middle Jurassic with Selliporella donzellii

2007
Algal remnants, that occur only rarely in the lower part of the Biokovo road, become more frequent and abundant as we go higher through the succession. The maximum concentration of the algal skeletons or skeletal fragments, mostly of Selliporella donzellii SARTONI & CRESCENTI, occur within individual beds or thinner intervals of successive layers in ...
Sokač, Branko, Velić, Ivo
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Glossopterid Leaves from the Middle Jurassic of Oaxaca, Mexico

Science, 1969
Leaves indistinguishable from those of the late Paleozoic genus Glossopteris occur in Middle Jurassic beds in the State of Oaxaca, Mexico. If they are biologically related to the Permo-Carboniferous Glossopteris, the occurrence in Mexico is the latest report of the genus.
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A revision of the referred specimen of Chuanjiesaurus anaensis Fang et al., 2000: a new early branching mamenchisaurid sauropod from the Middle Jurassic of China

Historical Biology, 2021
Hai-Lu You, Xin-Xin Ren
exaly  

Evolution of Middle Jurassic ammonites ‐a reply

Lethaia, 1985
Ulf Bayer, George R. McGhee
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A new species of Omeisaurus (Dinosauria: Sauropoda) from the Middle Jurassic of Yunyang, Chongqing, China

Historical Biology, 2021
Shan Jiang, Hai-Lu You, Xin-Xin Ren
exaly