Results 211 to 220 of about 12,589 (253)
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Reconstruction of a Lower Cretaceous conifer
Botanical Journal of the Linnean Society, 1983Remains of Pseudofrenelopsis parceramosa (Fontaine) Watson (Cheirolepidiaceae) from the Wealden of the Isle of Wight have been examined from the point of view of the branching and mode of growth of the plant. Evidence is presented that the tree exhibited seasonal growth and that the young extension shoots bore numerous temporary ultimate branch?
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Ecology of Lower Cretaceous Chalk
Proceedings, 2012Chalk sediments, that is here biomicrite with a porosity of 10 – 50%, are widespread in the late Cretaceous of the Boreal Realm. Chalk, however, is uncommon in the Early Cretaceous where clays and mudstones dominate for example in the Lower Saxony Basin (LSB), northeast England (Speeton) and elsewhere.
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Nummoloculina in Lower Cretaceous of Texas and Louisiana
AAPG Bulletin, 1956ABSTRACT Several occurrences of the miliolid Nummoloculina in the Lower Cretaceous of Texas (lower Glen Rose through upper Devils River limestones) and one occurrence in the Lower Cretaceous of northern Louisiana (lower Glen Rose limestone) are reported for the first time.
James E. Conkin, Barbara M. Conkin
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A belemnite scale for the Lower Cretaceous
Cretaceous Research, 1990Twenty belemnite zones are recognizable in the Lower Cretaceous of Northwest Europe. Some of these can be found in other boreal regions, but correlation with the Tethys is not possible before the Aptian.
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Lower Cretaceous Orbitolinas from Venezuela
Micropaleontology, 1996Two Orbitolina species were found in the Late Aptian-Early Albian of Venezuela. The first one, Orbitolina (Mesorbitolina) pervia Douglass 1960 was collected in the Eastern allochthonous area, at Bergantin, La Maravilla, in the Chimana Formation. This species is well known in different Tethyan regions. The second one, Orbitolina (Mesorbitolina) ovalis n.
Agnes Görög +2 more
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A hell ant from the Lower Cretaceous of Brazil
Current BiologyModern ants are among the most ecologically dominant animal groups on Earth, with their diversity shaped by global events occurring since their origin in the late Mesozoic.1,2,3 The so-called hell ants of the subfamily Haidomyrmecinae comprise a group of morphologically unique ants exclusive to the Cretaceous.4 They represent some of the earliest known
Anderson Lepeco +4 more
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A lower Cretaceous unconformity in eastern Wairarapa
New Zealand Journal of Geology and Geophysics, 1974Abstract Recent mapping in the Tinui‐Awatoitoi district has revealed a major unconformity in what was previously considered to be a continuous Cretaceous sequence. The rocks below the unconformity, mapped as the Torlesse Supergroup, are strongly folded, indurated greywacke and argillite, locally containing Upper Jurassic (Upper ...
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Lower Cretaceous of Wyoming and the Southern Rockies
Mountain Geologist, 1970ABSTRACT: Lower Cretaceous strata of Wyoming and the southern Rockies constitute one of the most complex stratigraphic sequences in the Rocky Mountain region. They consist of many different lithologic types formed in various depositional environments which existed during the early history of the Rocky Mountain Geosyncline.
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Lower Cretaceous Sourcelands and the North Atlantic
Nature, 1969ATTEMPTS to delay the Mesozoic opening of the North Atlantic1–4 bear directly on the difficulties of accounting for the nature of Lower Cretaceous shelf deposits in western Europe.
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Jurassic and Lower Cretaceous crinoids of northern Turkey
1987Systematics, phylogeny and stratigraphy of fossil crinoids coming from sediments of the Northern Anatolian (Turkey) are discussed. Neodadocrinus tokayi n.gen. n.sp. and Bilecicrinus anatolicus n.gen. n.sp. are described. Besides faunal relationships during the Jurassic between Europe and Northern Turkey are hypothesized.
MANNI, Riccardo Pier Celestino +1 more
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