Results 171 to 180 of about 14,570 (219)

English Aptian Terebratulidae

1959
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Aptian anoxia in the Pacific Basin

Geology, 1989
Marine strata of Aptian age in the Pacific Basin include two distinct levels that represent episodes during which sediments rich in organic carbon were deposited. Both episodes lasted less than 1 m.y., as revealed in strata deposited atop submerged topographic highs.
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Lead isotopic record of Barremian–Aptian marine sediments: Implications for large igneous provinces and the Aptian climatic crisis

Earth and Planetary Science Letters, 2011
We present initial isotopic ratios of lead for Early Cretaceous (Barremian–Aptian) sections from Shatsky Rise (Pacific) and Gorgo a Cerbara (Italy). Our Pb isotopic data track an interval representing Oceanic Anoxic Event (OAE)-1a, which is characterized by quasi-global deposition of organic carbon-rich black shale.
J. Kuroda, M. Tanimizu, R. S. Hori, K. Suzuki, N. O. Ogawa, M. L. Tejada, M. F. Coffin, R. Coccioni, E. Erba, N. Ohkouchi   +9 more
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Additional Aptian–Albian ammonoids from Patagonia

Cretaceous Research, 2018
Abstract Late Aptian – early Albian ammonoids of southern Patagonia are described. They are represented by Carinophylloceras collignoni Klinger, Wiedmann and Kennedy, Phyllopachyceras reymenti sp. nov., Tetragonites heterosulcatus Anthula, Anagaudryceras sacya (Forbes), Puzosia cf.
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The Barremian-Aptian arid phase in western Europe

Palaeogeography, Palaeoclimatology, Palaeoecology, 1990
Abstract Evidence is presented from nine areas in western Europe (Speeton, Yorkshire; southern North Sea; Channel and Weald Basins, southern England; Jeanne d'Arc, Lusitanian and Aquitanian Basins of the North Atlantic continental margins; Lower Saxony Basin, north Germany; the Paris Basin and southern France) for a phase of aridity which began ...
Alastair H. Ruffell, David J. Batten
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Aptian-Albian palaeogeography of Neo-Tethyan domain

Palaeogeography, Palaeoclimatology, Palaeoecology, 1991
Abstract The Aptian-Albian interval (124.5-97.0 Ma) was a critical time both globally and for the Tethyan domain. In the Tethyan domain it was the time when a united Neo-Tethyan subduction zone became established between the future site of the Alps and Southeast Asia and greatly accelerated the rate of north-south convergence throughout the Tethyan ...
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Substantiation of the Barremian/Aptian boundary

1999
This paper focuses on the Barremian/Aptian boundary in the Trans-Caspian area. Results of a stratigraphical study of the uppermost Barremian and the lower Aptian succession in the Trans-Caspian area are presented. The bed-by-bed description of three sections — Keldzhe, Tekedzhik and Utuludzha — is given as well as detailed lithologic columns.
Bogdanova, T.N., Prozorovsky, V.A.
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A new cheilostome bryozoan from the British Aptian

Proceedings of the Geologists' Association, 1976
A new species of cheilostome from the Lower Greensand of Faringdon (Aptian) is described and figured and an hypothesis for its origin discussed.
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Nannofossils and superplumes: The Early Aptian “nannoconid crisis”

Paleoceanography, 1994
A group of calcareous nannoplankton named nannoconids experienced a crisis in the early Aptian and recovered only later in the late Aptian after a period of virtual absence. Although no extinctions occurred, the widespread nature of the “nannoconid crisis” suggests a global causal factor.
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Aptian, adj.

2023
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