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  • 1
    Online Resource
    Online Resource
    Newark :John Wiley & Sons, Incorporated,
    Keywords: Paleoclimatology -- Oligocene. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (314 pages)
    Edition: 1st ed.
    ISBN: 9781444327434
    Series Statement: International Association of Sedimentologists Series
    DDC: 552/.58
    Language: English
    Note: Carbonate Systems During the Oligocene-Miocene Climatic Transition -- Contents -- Miocene carbonate systems: an introduction -- A synthesis of Late Oligocene through Miocene deep sea temperatures as inferred from foraminiferal Mg/Ca ratios -- Latitudinal trends in Cenozoic reef patterns and their relationship to climate -- Carbonate grain associations: their use and environmental significance, a brief review -- Temperate and tropical carbonate-sedimentation episodes in the Neogene Betic basins (southern Spain) linked to climatic oscillations and changes in Atlantic-Mediterranean connections: constraints from isotopic data -- Facies models and geometries of the Ragusa Platform (SE Sicily, Italy) near the Serravallian-Tortonian boundary -- The sensitivity of a tropical foramol-rhodalgal carbonate ramp to relative sea-level change: Miocene of the central Apennines, Italy -- Facies and sequence architecture of a tropical foramol-rhodalgal carbonate ramp: Miocene of the central Apennines (Italy) -- Facies and stratigraphic architecture of a Miocene warm-temperate to tropical fault-block carbonate platform, Sardinia (Central Mediterranean Sea) -- Coralline algae, oysters and echinoids - a liaison in rhodolith formation from the Burdigalian of the Latium-Abruzzi Platform (Italy) -- Palaeoenvironmental significance of Oligocene-Miocene coralline red algae - a review -- Molluscs as a major part of subtropical shallow-water carbonate production - an example from a Middle Miocene oolite shoal (Upper Serravallian, Austria) -- Echinoderms and Oligo-Miocene carbonate systems: potential applications in sedimentology and environmental reconstruction -- Coral diversity and temperature: a palaeoclimatic perspective for the Oligo-Miocene of the Mediterranean region -- Late Oligocene to Miocene reef formation on Kita-daito-jima, northern Philippine Sea. , Carbonate production in rift basins: models for platform inception, growth and dismantling, and for shelf to basin sediment transport, Miocene Sardinia Rift Basin, Italy -- Index.
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  • 2
    ISSN: 1432-1432
    Keywords: Foraminifera ; Sequence dissimilarity ; LSU rRNA gene ; Phylogeny
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An unusually high divergence was observed in the ribosomal RNA genes of a free-living population of foraminifera belonging to the genusAmmonia. The sequences of a large-subunit (LSU) rDNA expansion segment D1 and flanking regions were obtained from 20 specimens namedAmmonia sp. 1 andAmmonia sp. 2. The sequence divergence between the two species averages 14%. Within each species it ranges from 0.2% to 7.1% inAmmonia sp. 1 and from 0.7% to 2.3% inAmmonia sp. 2. We did not find two specimens having identical sequences. Moreover, in opposition to the generally acaepted view, rDNA sequence variations were also found within a single individual. The variations among several rDNA copies in a single specimen ofAmmonia may reach up to 4.9%. Most of the observed variations result from multiplication of CA or TA serial repeats occurring in two particularly variable regions. For single base changes, C-T transitions are most frequently observed. We discuss the evolution of expansion segments and their use for phylogenetic studies.
    Type of Medium: Electronic Resource
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