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  • 1
    Article
    Article
    Meeresspiegelschwankungen und ihre geologische Überlieferung im Karbonatsystem (1997)
    Associated volumes
    Details Availability
    In: Geowissenschaften, Berlin : Ernst & Sohn, 1988, 15(1997), 9, Seite 296-300, 0933-0704
    In: volume:15
    In: year:1997
    In: number:9
    In: pages:296-300
    Type of Medium: Article
    Pages: Ill., graph. Darst.
    ISSN: 0933-0704
    Language: German
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  • 2
    Online Resource
    Online Resource
    Sediment composition of periplatform sediments and calciturbidites around Pedro Bank, southwestern Caribbean Sea : = Sedimentzusammensetzung von Periplatformsedimenten und Kalkturbiditen im Bereich der Pedro Bank, südwestliches Karibisches Meer (2000)
    Details Availability
    Keywords: Dissertation ; Hochschulschrift ; Karibik Südwest ; Carbonatplattform ; Carbonatgestein ; Geochemie ; Eustatische Meeresspiegelschwankung ; Pleistozän ; Karibik Südwest ; Carbonatplattform ; Carbonatgestein ; Geochemie ; Eustatische Meeresspiegelschwankung ; Holozän
    Description / Table of Contents: Abstract ; Kurzfassung
    Type of Medium: Online Resource
    Pages: Online-Ressource (IV, 161, [129] S = 32.20 MB, Text) , Ill., graph. Darst., Kt.
    Edition: [Electronic ed.]
    URL: http://nbn-resolving.de/urn:nbn:de:gbv:8-diss-3871
    URL: http://d-nb.info/1006830987/34
    URL: http://macau.uni-kiel.de/receive/dissertation_diss_00000387
    URN: urn:nbn:de:gbv:8-diss-3871
    DDC: 550
    Language: English
    Note: Kiel, Univ., Diss., 2000 , Online-Ausg.: , [Online-Ausg.]
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  • 3
    Online Resource
    Online Resource
    Sediment composition of periplatform sediments and calciturbidites around Pedro Bank, southwestern Caribbean Sea (2000)
    Kiel
    Details Availability
    Keywords: Dissertation ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource ( 308Seiten = 25MB) , Ill., graph. Darst., Kt.
    URL: https://oceanrep.geomar.de/id/eprint/30986/
    Language: English
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  • 4
    Electronic Resource
    Electronic Resource
    Localization of Alkaline Phosphatase in Yeast (1948)
    [s.l.] : Nature Publishing Group
    Nature 162 (1948), S. 192-193 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Gomori technique1 for alkaline phosphatase localization has been extensively employed with animal and plant material; but it does not appear to have been employed with yeasts. The presence of acid and alkaline phosphatases in yeasts is Well known2"3"4; but the location of these enzymes in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/162192a0
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    Paper (German National Licenses)
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  • 5
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    Meeresspiegelschwankungen und ihre geologische Überlieferung im Karbonatsystem (1997)
    Ernst & Sohn
    In:  Geowissenschaften, 15 (9). pp. 287-291.
    Details
    Publication Date: 2018-12-19
    Description: The dependency between carbonate sediment production on a carbonate platform and its relation to sea-level changes is discusses here. The topography of the upper slope plays an important role in determining the way in which sedimentation continues during lowstands in sea level. The mineralogy and composition of sediments produced on the platform can clearly be related to those found in sediments deposited in the adjacent basin. Two examples from the Recent are described: (1) Sanganeb Atoll (Red Sea), and (2) Pedro Bank (caribbean). The applicability of the "highstand shedding" principle is shown for ancient carbonate platforms.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Sediment Composition of periplatform sediments and calciturbidites around Pedro Bank, Southwestern Caribbean Sea (2000)
    Details
    Publication Date: 2023-02-08
    Description: Spatial and temporal variations in the carbonate production and sediment export of the Pedro Bank carbonate platform were studied in response to the late Quaternary sea level fluctuations. A set of nine sediment cores were obtained from up- and downcurrent position to Pedro Bank to form a downcurrent offbank transect that covers the proximal toe-of-slope to a distal basinal setting. The sediments studied were deposited between 650 to 2520 meter below recent sea level, and reach back until oxygen isotope stage 9, i.e. until approximately 300-310 ky. The sediments recovered are rather uniform, and consist of foraminifer- and pteropod-bearing aragonite-rich mud- to wackstones. This typical periplatform lithology incorporates calciturbidites, which are of pelagic as well as neritic origin. The pelagic sourced turbidites are generally evident as fine tail-end turbidites, whereas the few neritic calciturbidites are present as coarse pack- to grainstones. The sediments were analysed on their ability to record the export patterns of neritic sediment from the shallow tops of Pedro Bank. Therefore mineralogical, sedimentological and geochemical analyses were performed. The aragonite and strontium content were found to be good indicators for variations in shallow-water sediment export. The geochemistry data, as well as the grainsize and component distribution patterns, were useful to differentiate between primary sediment input signals and secondary processes such as dissolution and preservation of metastable carbonates at the seafloor. This study shows that during the last 300 ky (1) sea-level fluctuations, but also the (2) ocean currents, (3) pelagic and neritic sediment production, (4) dissolution of metastable sediment constituents, and (5) input of non-carbonates have had a major control on the sediment dispersal, sediment deposition and composition, especially along the downcurrent margin, where main neritic export occurs. The mineralogical and grain-size composition documents this variability of periplatform sedimentation along the margins off Pedro Bank. In addition, it was found that also the seafloor morphology plays an important role for the spatial and temporal evolution of the periplatform sedimentation in the vicinity of Pedro Bank, which is situated in a tectonically active plate margin setting.
    Type: Thesis , NonPeerReviewed
    Format: text
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  • 7
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    Mineralogy and grain size variations along two carbonate margin-to-basin transects (Pedro Bank, Northern Nicaragua Rise) (2007)
    Elsevier
    In:  Sedimentary Geology, 198 (3-4). pp. 327-350.
    Details
    Publication Date: 2018-07-19
    Description: The analysis of nine periplatform cores in the surrounding of the Pedro Bank carbonate platform showed the presence of characteristic depositional environments during the last 300 ky. This subdivision is based on mineralogical and grain size variations in space and time. Along the leeward, downcurrent transect the fine sediment fraction (〈 63 μm) dominates the periplatform sediments during interglacial highstands in sea level, and no spatial variations in the fine sediment concentration could be observed within 100 km offbank distance. The sediments are mainly of neritic origin preferentially fine aragonite needles. With increasing distance from the margin (〉 40 km) aragonite is still the most abundant mineral, but the percentage decreases, while the pelagic carbonate mineral content (LMC) increases. Within the subordinate coarse-fraction classes (〉 63 μm) the very fine sand-fraction dominates at proximal sites (〈 20 km) as a result of the influence of fine neritic sediments shed offbank. More distal sites (〉 20 km) show a more bimodal distribution pattern in the coarse grain sizes with maximum percentages within the very fine and medium sand-fraction, indicating a mixed neritic/pelagic signal. During glacial lowstands in sea level a twofold division in the spatial distribution of the periplatform sediments is evident. A proximal environment (〈 28 km) with enhanced coarse-fraction percentages vs. a distal environment (〉 28 km) showing a strong dominance of the fine fraction (〉 90%). The increased coarse-fraction percentage during glacials at proximal sites results from various interacting processes: (1) lower input of fine neritic sediments, (2) increased current winnowing, and (3) redepositional processes at the upper slope during lowered sea level, and the export of this material to “proximal basinal” sites (〈 28 km). At upcurrent sites the mineralogy displays a similar spatial evolution as seen along the downcurrent margin, but with overall reduced percentages. This is the result of the lower export potential of the platform against the main direction of the Caribbean Current, the most important factor for neritic sediment dispersal in the study area. The coarse-fraction content is slightly higher during interglacials compared to the downcurrent margin. During glacials a similar reduction in the percentage of the coarse-fraction is evident in a spatial context. This also substantiates the reduced sediment export and redeposition potential at the upcurrent margin.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/j.sedgeo.2007.01.018
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  • 8
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    Timing and distribution of calciturbidites around a deeply submerged carbonate platform in a seismically active setting (Pedro Bank, Northern Nicaragua Rise, Caribbean Sea) (2003)
    Springer
    Details
    Publication Date: 2022-03-07
    Description: The sedimentological study of thirteen sediment cores from the periplatform setting surrounding Pedro Bank (Northern Nicaragua Rise, Caribbean Sea) shows that during the last 300 ka turbidite deposition is controlled by at least four factors: (1) late Quaternary sea level fluctuations, (2) prolific fine-grained sediment production and export resulting in oversteepening of the upper slope environment, (3) the proximity to the bank margin, and (4) local slope and seafloor morphology. The most intriguing finding of this study is the paucity of turbidites, with only 101 turbidites in 13 cores in this tectonically active setting near the Caribbean plate boundary. Throughout the last 300 ka, the frequency of turbidite input during interglacial stages is three times higher than during glacial stages. Also it is obvious that changes in sea level influence the timing of turbidite deposition. This is especially evident during the transgressions resulting in rapid renewed bank-top flooding, subsequent neritic sediment overproduction, and offbank export. The flooding event during each transgression is usually recorded by the onset of turbidite deposition at various sites along several platform-to-basin transects in down- and upcurrent slope settings. Overall, however, more turbidites are deposited during the regressive rather than the transgressive phases in sea level, probably as a result of sediment reorganisation on the slope resulting in slope failure. Five cores show "highstand bundling" of calciturbidites, i.e. higher number of turbidites during highstands than during lowstands in sea level.
    Type: Article , PeerReviewed
    Format: text
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