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  • English  (5)
  • German  (3)
  • Hungarian
  • Japanese
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  • 2015-2019
  • 2010-2014
  • 1995-1999  (6)
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  • 1
    Unknown
    London : The Geological Society
    Keywords: Datenverarbeitung ; Geologie ; Géologie - Bases de données
    Description / Table of Contents: Jeremy R. A. Giles: The what, why, when, how, where and who of geological data management / Geological Society, London, Special Publications, 97:1-4, doi:10.1144/GSL.SP.1995.097.01.01 --- Database design --- Ken Rasmussen: An overview of database analysis and design for geological systems / Geological Society, London, Special Publications, 97:5-11, doi:10.1144/GSL.SP.1995.097.01.02 --- K. J. Chew: Data modelling a general-purpose petroleum geological database / Geological Society, London, Special Publications, 97:13-23, doi:10.1144/GSL.SP.1995.097.01.03 --- J. S. Coats and J. R. Harris: Database design in geochemistry: BGS experience / Geological Society, London, Special Publications, 97:25-32, doi:10.1144/GSL.SP.1995.097.01.04 --- J. R. A. Giles and K. A. Bain: The nature of data on a geological map / Geological Society, London, Special Publications, 97:33-40, doi:10.1144/GSL.SP.1995.097.01.05 --- Michael R. Saunders, John A. Shields, and Michael R. Taylor: Improving the value of geological data: a standardized data model for industry / Geological Society, London, Special Publications, 97:41-53, doi:10.1144/GSL.SP.1995.097.01.06 --- M. Lhotak and M. C. Boulter: Towards the creation of an international database of palaeontology / Geological Society, London, Special Publications, 97:55-64, doi:10.1144/GSL.SP.1995.097.01.07 --- D. G. Toll and A. J. Oliver: Structuring soil and rock descriptions for storage in geotechnical databases / Geological Society, London, Special Publications, 97:65-71, doi:10.1144/GSL.SP.1995.097.01.08 --- S. C. R. Mallender: The use of text databases in the management of exploration data / Geological Society, London, Special Publications, 97:73-79, doi:10.1144/GSL.SP.1995.097.01.09 --- Data Management --- D. J. Lowe: The geological data manager: an expanding role to fill a rapidly growing need / Geological Society, London, Special Publications, 97:81-90, doi:10.1144/GSL.SP.1995.097.01.10 --- Paul R. Duller: The quality assurance of geological data / Geological Society, London, Special Publications, 97:91-95, doi:10.1144/GSL.SP.1995.097.01.11 --- Stephen Henley: Project databases: standards and security / Geological Society, London, Special Publications, 97:97-101, doi:10.1144/GSL.SP.1995.097.01.12 --- Roy K. Lowry and Raymond N. Cramer: Database applications supporting Community Research Projects in NERC marine sciences / Geological Society, London, Special Publications, 97:103-107, doi:10.1144/GSL.SP.1995.097.01.13 --- Roy K. Lowry and Stephen G. Loch: Transfer and SERPLO: powerful data quality control tools developed by the British Oceanographic Data Centre / Geological Society, London, Special Publications, 97:109-115, doi:10.1144/GSL.SP.1995.097.01.14 --- R. C. Bowie: Data management in the National Geological Records Centre / Geological Society, London, Special Publications, 97:117-125, doi:10.1144/GSL.SP.1995.097.01.15 --- Richard G. Miller and John S. Gardner: Geoscience data value, cost and management in the oil industry / Geological Society, London, Special Publications, 97:127-135, doi:10.1144/GSL.SP.1995.097.01.16 --- Case Studies --- P. Doorgakant: Groundwater level archive for England and Wales / Geological Society, London, Special Publications, 97:137-144, doi:10.1144/GSL.SP.1995.097.01.17 --- S. Power, M. Scott, G. Robinson, and I. Statham: Database design and data management on the Swansea-Llanelli Earth Science Mapping Project / Geological Society, London, Special Publications, 97:145-155, doi:10.1144/GSL.SP.1995.097.01.18 --- Andrew A. McKenzie: A hydrogeological database for Honduras / Geological Society, London, Special Publications, 97:157-162, doi:10.1144/GSL.SP.1995.097.01.19 --- Stephen G. Allen: CD-ROM and its application to the petroleum industry / Geological Society, London, Special Publications, 97:163-180, doi:10.1144/GSL.SP.1995.097.01.20
    Pages: Online-Ressource (185 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 189779939X
    Language: English
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  • 2
    Keywords: Altersbestimmung ; Geochronologie ; Geologie ; Geologische Korrelation ; Lithostratigraphie ; Physikalische Altersbestimmung ; Isotopendatierung ; Geochemie ; Lumineszenz
    Description / Table of Contents: R. E. Dunay and E. A. Hailwood: Non-biostratigraphical methods of dating and correlation: an introduction / Geological Society, London, Special Publications, 89:1-2, doi:10.1144/GSL.SP.1995.089.01.01 --- Andrew Morton and Andrew Hurst: Correlation of sandstones using heavy minerals: an example from the Statfjord Formation of the Snorre Field, northern North Sea / Geological Society, London, Special Publications, 89:3-22, doi:10.1144/GSL.SP.1995.089.01.02 --- Maria A. Mange-Rajetzky: Subdivision and correlation of monotonous sandstone sequences using high-resolution heavy mineral analysis, a case study: the Triassic of the Central Graben / Geological Society, London, Special Publications, 89:23-30, doi:10.1144/GSL.SP.1995.089.01.03 --- C. V. Jeans: Clay mineral stratigraphy in Palaeozoic and Mesozoic red bed facies onshore and offshore UK / Geological Society, London, Special Publications, 89:31-55, doi:10.1144/GSL.SP.1995.089.01.04 --- Andrew Carter, Charles S. Bristow, and Anthony J. Hurford: The application of fission track analysis to the dating of barren sequences: examples from red beds in Scotland and Thailand / Geological Society, London, Special Publications, 89:57-68, doi:10.1144/GSL.SP.1995.089.01.05 --- A. Racey, M. A. Love, R. M. Bobolecki, and J. N. Walsh: The use of chemical element analyses in the study of biostratigraphically barren sequences: an example from the Triassic of the central North Sea (UKCS) / Geological Society, London, Special Publications, 89:69-105, doi:10.1144/GSL.SP.1995.089.01.06 --- Timothy J. Pearce and Ian Jarvis: High-resolution chemostratigraphy of Quaternary distal turbidites: a case study of new methods for the analysis and correlation of barren sequences / Geological Society, London, Special Publications, 89:107-143, doi:10.1144/GSL.SP.1995.089.01.07 --- John Roberts, Jonathan Claoue-Long, Peter J. Jones, and Clinton B. Foster: SHRIMP zircon age control of Gondwanan sequences in Late Carboniferous and Early Permian Australia / Geological Society, London, Special Publications, 89:145-174, doi:10.1144/GSL.SP.1995.089.01.08 --- Jonathan Russell: Direct Pb/Pb dating of Silurian macrofossils from Gotland, Sweden / Geological Society, London, Special Publications, 89:175-200, doi:10.1144/GSL.SP.1995.089.01.09 --- A. Dalland, E. W. Mearns, and J. J. McBride: The application of samarium-neodymium (Sm-Nd) Provenance Ages to correlation of biostratigraphically barren strata: a case study of the Statfjord Formation in the Gullfaks Oilfield, Norwegian North Sea / Geological Society, London, Special Publications, 89:201-222, doi:10.1144/GSL.SP.1995.089.01.10 --- H. M. Rendell: Luminescence dating of Quaternary sediments / Geological Society, London, Special Publications, 89:223-235, doi:10.1144/GSL.SP.1995.089.01.11 --- Chang-Shu Yang and Wim F. P. Kouwe: Wireline log-cyclicity analysis as a tool for dating and correlating barren strata: an example from the Upper Rotliegend of The Netherlands / Geological Society, London, Special Publications, 89:237-259, doi:10.1144/GSL.SP.1995.089.01.12
    Pages: Online-Ressource (265 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799306
    Language: English
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  • 3
    Keywords: Atlantischer Raum (Nord) ; Geologie ; Paläoozeanographie ; Sedimentation ; Tektonik ; Failles (Géologie) - Atlantique Nord, Région de l' ; Failles (Géologie) - Terre-Neuve-et-Labrador ; Geologia historica ; North Atlantic Region ; Paleoceanography ; Paléo-océanographie - Atlantique Nord, Région de l' ; Plate tectonics ; Sedimentation and deposition ; Sedimentologia ; Sédimentation (Géologie) - Atlantique Nord, Région de l' ; Tectonique des plaques - Atlantique Nord, Région de l'
    Description / Table of Contents: Neal W. Driscoll, John R. Hogg, Nicholas Christie-Blick, and Garry D. Karner: Extensional tectonics in the Jeanne d’Arc Basin, offshore Newfoundland: implications for the timing of break-up between Grand Banks and Iberia / Geological Society, London, Special Publications, 90:1-28, doi:10.1144/GSL.SP.1995.090.01.01 --- Iain K. Sinclair: Sequence stratigraphic response to Aptian-Albian rifting in conjugate margin basins: a comparison of the Jeanne d’Arc Basin, offshore Newfoundland, and the Porcupine Basin, offshore Ireland / Geological Society, London, Special Publications, 90:29-49, doi:10.1144/GSL.SP.1995.090.01.02 --- C. C. Ebdon, P. J. Granger, H. D. Johnson, and A. M. Evans: Early Tertiary evolution and sequence stratigraphy of the Faeroe-Shetland Basin: implications for hydrocarbon prospectivity / Geological Society, London, Special Publications, 90:51-69, doi:10.1144/GSL.SP.1995.090.01.03 --- G. Boillot, M. O. Beslier, C. M. Krawczyk, D. Rappin, and T. J. Reston: The formation of passive margins: constraints from the crustal structure and segmentation of the deep Galicia margin, Spain / Geological Society, London, Special Publications, 90:71-91, doi:10.1144/GSL.SP.1995.090.01.04 --- T. J. Reston, C. M. Krawczyk, and H.-J. Hoffmann: Detachment tectonics during Atlantic rifting: analysis and interpretation of the S reflection, the west Galicia margin / Geological Society, London, Special Publications, 90:93-109, doi:10.1144/GSL.SP.1995.090.01.05 --- Liselotte Kiørboe and Steen Agerlin Petersen: Seismic investigation of the Faeroe basalts and their substratum / Geological Society, London, Special Publications, 90:111-123, doi:10.1144/GSL.SP.1995.090.01.06 --- K. Vanneste, J.-P. Henriet, J. Posewang, and F. Theilen: Seismic stratigraphy of the Bill Bailey and Lousy Bank area: implications for subsidence history / Geological Society, London, Special Publications, 90:125-139, doi:10.1144/GSL.SP.1995.090.01.07 --- Morten Sparre Andersen and Lars Ole Boldreel: Effect of Eocene-Miocene Compression Structures on Bottom-Water Currents in the Faeroe-Rockall Area / Geological Society, London, Special Publications, 90:141-143, doi:10.1144/GSL.SP.1995.090.01.08 --- Lars Ole Boldreel and Morten Sparre Andersen: The relationship between the distribution of Tertiary sediments, tectonic processes and deep-water circulation around the Faeroe Islands / Geological Society, London, Special Publications, 90:145-158, doi:10.1144/GSL.SP.1995.090.01.09 --- M. S. Stoker: The influence of glacigenic sedimentation on slope-apron development on the continental margin off Northwest Britain / Geological Society, London, Special Publications, 90:159-177, doi:10.1144/GSL.SP.1995.090.01.10 --- Regin Waagstein and Claus Heilmann-Clausen: Petrography and biostratigraphy of Palaeogene volcaniclastic sediments dredged from the Faeroes shelf / Geological Society, London, Special Publications, 90:179-197, doi:10.1144/GSL.SP.1995.090.01.11 --- E. J. W. Jones, S. C. Cande, and F. Spathopoulos: Evolution of a major oceanographic pathway: the equatorial atlantic / Geological Society, London, Special Publications, 90:199-213, doi:10.1144/GSL.SP.1995.090.01.12 --- Morten Sparre Andersen and Lars Ole Boldreel: Tertiary compression structures in the Faeroe-Rockall area / Geological Society, London, Special Publications, 90:215-216, doi:10.1144/GSL.SP.1995.090.01.13 --- Simon K. Haslett: Pliocene-Pleistocene radiolarian biostratigraphy and palaeoceanography of the North Atlantic / Geological Society, London, Special Publications, 90:217-225, doi:10.1144/GSL.SP.1995.090.01.14 --- John B. Hunt, Nigel G. T. Fannin, Peter G. Hill, and J. Douglas Peacock: The tephrochronology and radiocarbon dating of North Atlantic, Late-Quaternary sediments: an example from the St. Kilda Basin / Geological Society, London, Special Publications, 90:227-248, doi:10.1144/GSL.SP.1995.090.01.15 --- K. Thomson and R. R. Hillis: Tertiary structuration and erosion of the Inner Moray Firth / Geological Society, London, Special Publications, 90:249-269, doi:10.1144/GSL.SP.1995.090.01.16 --- C. N. Wold: Palaeobathymetric reconstruction on a gridded database: the northern North Atlantic and southern Greenland-Iceland-Norwegian sea / Geological Society, London, Special Publications, 90:271-302, doi:10.1144/GSL.SP.1995.090.01.17
    Pages: Online-Ressource (309 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 1897799276
    Language: English
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  • 4
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    Unknown
    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Publication Date: 2024-04-17
    Description: REITNER, Joachim & KOHRING, Rolf: Prof. Dr. Gundolf ERNST zum 65. Geburtstag. Eine kritische Würdigung des Jubilars ... 5 ; VOIGT, Ehrhard & GORDON, Dennis P.: Ascancestor and Confusocella - two new genera of cheilostomate Bryozoa from the Upper Cretaceous with transitional frontal-shield morphologies ... 15 ; KENNEDY, William J. & KAPLAN, Ulrich: Pseudojacobites farmeryi (CRICK, 1905), ein seltener Ammonit des westfälischen und englischen Ober-Turon ... 25 ; SEIBERTZ, Ekbert & SPAETH, Christian: Die Kreide-Belemniten von Mexiko II. Belemniten des Turon Nord-Mexikos ... 45 ; WIESE, Frank & WILMSEN, Markus: Erstnachweis aus Europa von Litophragmatoceras incomptum (Ammonoidea, Kreide) aus dem Mittel-Cenoman von Liencres (Kantabrien, Nordspanien) ... 53 ; WIESE, Frank: Das mittelturone Romaniceras kallesi-Event im Raum Santander (Nordspanien): Lithologie, Stratigraphie, laterale Veränderung der Ammonitenassoziationen und Paläobiogeographie ... 61 ; KRÜGER, Fritz J.: Leere Oberkretazische Echiniden-Coronen als Habitat benthonischer Organismen ... 79 ; MEHL, Dorte & NIEBUHR, Birgit: Diversität und Wachstumsformen bei Coeloptychium (Hexactinellida, Lychniskosa) der Meiner Mulde (Untercampan, NW-Deutschland) und die Palökologie der Coeloptychidae ... 91 ; REHFELD, Ursula & OTTO, Armin: Distribution and preservation of siliceous sponges of the rhythmically bedded spongiolitic rocks in the Lower Campanian of northern Spain (Cantabria, Santander area): Response to autecology and sea level development ... 109 ; FECHNER, Glenn G.: Phytoplankton und Sporomorphen aus dem Cenoman-Basiskonglomerat von Bochum (Nordrheinwestfalen, Deutschland) ... 129 ; KEUPP, Helmut: Die kalkigen Dinoflagellaten-Zysten aus dem Ober-Alb der Bohrung Kirchrode 1/91 (zentrales Niedersächsisches Becken, NW-Deutschland) ... 155 ; VOIGT, Silke: Verbreitung humider und arider Klimate der nördlichen Hemisphäre während der Oberkreide ... 201 ; HORNA, Frank: Komplexer Nachweis einer Tufflage im Turon von Hoppenstedt ... 207 ; WRAY, David S. & WOOD, Christopher J.: Geochemical identification and correlation of tuff layers in Lower Saxony, Germany ... 215 ; MUTTERLOSE, Jörg & WIEDENROTH, Kurt: Die Bio- und Lithofazies der Unterkreide (Hauterive bis Apt) in NW-Deutschland ... 227 ; TRÖGER, Karl-Armin & VOIGT, Thomas: Event-und Sequenzstratigraphie in der Sächsischen Kreide... 255 ; SEIBERTZ, Ekbert: Towards the single-species boundary definition - a concept proposal with application to the Turonian-Coniacian stage boundary (Upper Cretaceous) ... 269 ; WOOD, Christopher J. & MORTIMORE, Rory N.: An anomalous Black Band succession (Cenomanian - Turonian boundary interval) at Melton Ross, Lincolnshire, eastern England and its international significance ... 277 ; KUTZ, Andreas: Kalk-Mergel-Rhythmite der Oberkreide (Campan und Maastricht) am Massiv von Oroz Betelu (N-Spanien, Provinz Navarra). Ein Exkursionsführer ... 289 ; WOLF, Ernst-Otto.: Sedimentologie, Paläogeographie und Faziesentwicklung der Allochthonite des Campan von Beckum/Zentrales Münsterland ... 305 ; KRIWET, Jürgen & GLOY, Uwe: Zwei mesopelagische Raubfische (Actinopterygii: Euteleostei) aus dem Unterturon der Kronsberg-Mulde bei Hannover / Misburg (NW-Deutschland) ... 335 ; RAUHUT, Oliver W.M.: Zur systematischen Stellung der afrikanischen Theropoden Carcharodontosaurus STROMER 1931 und Bahariasaurus STROMER 1934 ... 357 ; WERNER, Christa: Neue Funde von mesozoischen Wirbeltieren in Äthiopien... 377 ;
    Description: commemorativepublication
    Description: DFG, SUB Göttingen
    Keywords: ddc:560 ; Paläobiologie
    Language: German , English
    Type: doc-type:book
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  • 5
    facet.materialart.
    Unknown
    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Publication Date: 2024-04-17
    Description: SCHUDACK, Michael E.: Neue mikropaläontologische Beiträge (Ostracoda, Charophyta) zum Morrison-Ökosystem (Oberjura des Western Interior, USA) ... 389 ; BARTHOLDY, Jan, BELLAS, Spyridon M., MERTMANN, Dorothee, MACHANIEC, Elsbieta & MANUTSOGLU, Emmanuil: Fazies- Entwicklung und Biostratigraphie einer Sequenz eozäner Sedimente im Steinbruch Pod Capkami, Tatra-Gebirge, Polen ... 409 ; SCHULZ, Eberhard: Palynologische Untersuchungen des marinen Mittelrhäts im Creuzburger Graben bei Eisenach (W-Thüringen) ... 427 ; KRUTZSCH, Wilfried: Verbreitung der Trockenzonen im Kainophytikum - Eine Skizze ... 439 ; KOHRING, Rolf & SCHLÜTER, Thomas: Erhaltungsmechanismen känozoischer Insekten in fossilen Harzen und Sedimenten ... 457 ; ZILS, Wolfgang, WERNER, Christa, MORITZ, Andrea & SAANANE, Charles: Orientierende Tendaguru-Expedition 1994 ... 483 ; KIENEL, Ulrike, REHFELD, Ursula & BELLAS, Spyridon M.: The Miocene Blue Clay Formation of the Maltese Islands: Sequence-stratigraphic and palaeoceanographic implications based on calcareous nannofossil stratigraphy ... 533 ; SOUJON, Andr6, MANUTSOGLU, Emmanuil, REITNER, Joachim & JACOBSHAGEN, Volker: Lithistide Demospongiae aus der metamorphen Plattenkalk-Serie der Trypali Ori (Kreta/Griechenland) … 559 ; BARON-SZABO, Rosemarie C.: Taxonomy and Palaeoecology of Late Miocene corals of NW-Crete (Gramvoüssa, Roka- and Koukounaras- Fms.) ... 569 ; MANUTSOGLU, Emmanuil, MERTMANN, Dorothee, SoujON, Andre, DORNSIEPEN, Ulrich Friedrich & JACOBSHAGEN, Volker: Zur Nomenklatur der Metamorphite auf der Insel Kreta, Griechenland ... 579 ; FRYDAS, D., KONTOPOULOS, N., STAMATOPOULOS, L., GUERNET, C. & VOLTAGGIO, M.: Middle-Late Pleistocene sediments in the northwestern Peloponnesus, Greece. A combined study of biostratigraphical, radiochronological and sedimentological results ... 589 ; BECKER, R. Thomas: Taxonomy and Evolution of Late Famennian Tornocerataceae (Ammonoidea) ... 607 ; GRÖSCHKE, Manfred & KAPILIMA, Saldi: Ammoniten aus dem Septarienmergel (Kimmeridgium) des Mandawa-Mahokondo-Gebietes bei Nchia, Südtansania ... 645 ; KEUPP, Helmut & RIEDEL, Frank: Nautilus pompilius in captivity: a case study of abnormal shell growth ... 663 ; KRIWET, Jürgen: Beitrag zur Kenntnis der Fisch-Fauna des Ober-Jura (unteres Kimmeridge) der Kohlengrube Guimarota bei Leiria, Mittel-Portugal: 1 . Asteracanthus biformatus n. sp. (Chondrichthyes: Hybodontoidea) ... 683 ; MARTIN, Thomas: Incisor enamel microstructure and phylogenetic interrelationships of Pedetidae and Ctenodactyloidea (Rodentia) ... 693 ; ERESKOVSKY, Alexander V.: Materials to the Faunistic Study of the White and Barents seas sponges. 5. Quantitative Distribution ... 709 ; ERESKOVSKY, Alexander V.: Materials to the Faunistic Study of the White and Barents seas sponges. 6. The origin of the White and Barents seas sponge faunas ... 715 ; WÖRHEIDE, Gert: Bi- und multivariate Analyse borealer und mediterraner Populationen der Echinocardium cordatum - Gruppe (Echinoidea; Spatangoida) ... 731 ; HILBRECHT, Heinz: Computergestützte Methoden in der Morphometrie ... 765 ; CLAUSING, Andreas: Some critical notes on qualitative versus quantitative analysis in terrestrial palaeoecology ... 781 ; GLOY, Uwe: Bibliographie 1994, Institut für Paläontologie, Freie Universität Berlin ... 787 ;
    Description: commemorativepublication
    Description: DFG, SUB Göttingen
    Keywords: ddc:560 ; Paläobiologie
    Language: German , English
    Type: doc-type:book
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  • 6
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    Unknown
    Selbstverlag Fachbereich Geowissenschaften, FU Berlin
    In:  Herausgeberexemplar
    Publication Date: 2024-04-17
    Description: Am Westrand des Basko-Kantabrischen Beckens (Soba-Region, Prov. Cantabria, Nordspanien) sind die Plattform/Becken-Übergangszonen des Apt und Alb in nahezu ungestörtem Verband erhalten. Entlang dieser Randzonen befinden sich großdimensionierte Mud Mound-Strukturen mit einer Basisbreite bis 150 m und einer Höhe bis zu 70 m. Diese Arbeit zielt auf die Erarbeitung der Prozesse, die die Bildung der Mounds begleiten, beeinflussen oder steuern. Das Intervall Oberapt (Clansay) bis Mittelaib besteht aus sechs sedimentär-diagenetischen Zyklen (asymmetrische Trans-, Regressionszyklen), die in Kombination mit Markerhorizonten eine stratigraphische Kontrolle über den Plattform/Becken-Transekt ermöglichen. Meeresspiegelschwankungen (Paläokarst) sind im Apt/Alb-Grenzintervall und hohen Unteralb (Ammonitenzone: Douvilleiceras mammilatum) nachweisbar. Die Vorkommen der Mud Mounds sind an transgressive Faziesdiskontinuitäten gebunden. Ihre Position entspricht dem zu Strömungen exponierten Hang und dem oberen Plattformrand. Die Biofazies reicht von einer aphotischen Gemeinschaft aus “Lithistida“, Hexactinellida, krustosen Foraminiferen, Polychaeten, Thecideen und Acanthochaeteten zu der photischen Biofazies mit Scleractinia, Lithophyllum und Bacinella/Lithocodium. Die Strukturbildung erfolgt durch eine autochthone Mikritproduktion (Automikrit). Akkretionäre Automikrite bilden Stromatolithe, Thrombolithe und massive Gefügetypen. Container-Automikrit befindet sich in geschützten und geschlossen Räumen. Kieselschwamm Container-Automikrite sind aphanitisch, peloidal und peloidal-bakterioform. Unabhängig von Kieselschwämmen treten Container-Automikrite in Kleinhöhlen, Taschen und im Interpartikelvolumen auf. Sie bestehen aus in-situ Peloiden und in-situ Ooiden mit massivem und/oder stromatolithischem Gefüge. Die verschiedenen Automikrittypen besetzen zwischen 50 und 80 Vol.-% der Mud Mounds. Anbohrungen durch lithophage Bivalven und Aka sowie die ausschließliche Produktion angularer Mound-Lithoklasten belegen eine Lithifizierung in statu nascendi. Die Primärmineralogie der Automikrite ist Hoch-Mg-Calcit; die Residualgehalte an MgCOa liegen zwischen 1 ,2 und 3,6 Mol-%. Die Zusammensetzung der stabilen Isotope S13C und S18O (vs PDB) ist analog zu anorganisch gebildeten, marinen Zementen (513C von 2,9 bis 3,8 und S18O von -1,5 bis -4). Die vergleichende Aminosäuren-Analyse ergibt ein relatives Maximum bei Glu und Asp, Pyruvaten und Glycin, resp. Tyrosin. Das Spektrum ist analog zu den Literaturdaten von modernen Automikriten aus Riffhöhlen von Lizard Island (GBR) und unterscheidet sich grundlegend von den strukturgebundenen Skelett-Automikriten von Bacinella/Lithocodium. Die Biomarker-Analyse akkretionärer Automikrite ergab ein spezifisches n-Alkan Muster, ebenfalls vergleichbar mit Spektren rezenter Thrombolithe (Lizard Island) und Beispielen der oberjurassischen Spongiolith-Fazies. Die Grundvoraussetzung der Mud Mound-Genese ist daher die Bereitstellung saurer Makromoleküle (Organomikrit) und eine anhaltend ungestörte Wechselwirkung mit dem umgebenden Medium. Die chemische Randbedingung ist eine erhöhte Karbonatalkalinität. Nach mikrofaziellen Kriterien ist Organomikrit ein faziesbrechendes Element der unterkretazischen Plattformränder. Beispiele reichen von karbonatischen Barrensanden mit Organomikrit-Rindenkörnern, über deltaische Sandsteine (Organomikrit um Quarz) bis zu Kondensationshorizonten auf Paläokarst sowie Drowning-Sequenzen auf Korallenpflastern (Sclercatinia zu Kalkalgen zu Thrombolith). Die Bildung der Mud Mounds (Organomikrit-Riffe) der Soba-Region ist korreliert mit einer regional extrem herabgesetzten Karbonatproduktion. Diese durch terrigenen Input und mögliche Eutrophierungen verursachten Produktionskrisen setzten die relativ uneffektive Organomikritproduktion in Vorteil gegenüber den stenoöken Gemeinschaften der euphotischen Zone. Die erhöhte Karbonatalkalinität kann von der Zufuhr der Verwitterungslösungen (regional) und dem Abau organischer Substanzen abgeleitet werden (lokal, Sulfatreduktion). Möglicherweise bestand ein Zusammenhang mit der Auslaugung von Keuperdiapiren.
    Description: At the western margin of the Vasco-Cantabrian Basin (Soba-Region, Prov. Cantabria, N-Spain) the primary facies architecture of the Aptian-Albian platform/basin transition is well preserved. Along these zones large-scaled mud mounds reach 70 meters in height with a basal diameter of up to 150 meters. Aim of this work is to point out processes that are limited to coexistance and such that influence or even control mud mound formation. The Upper Aptian (Clansayesian) to Middle Albian interval consists of six sedimentary-diagenetic cycles that represent asymmetric transgressive/regressive facies sequences. In combination with marker horizons these cycles provide a stratigraphic control across the platform/basin transition. Sea-level changes recorded as paleokarst are documented in the Aptian/Albian boundary interval and within the upper parts of the Lower Albian (ammonite zone: Douvilleiceras mammilatum). Mud Mounds follow transgressive discontinuities of facies. These structures are both located at slopes facing wave-induced current systems and at the upper platform margin. The involved biofacies include an aphotic community with lithistid demosponges, hexactinellids, encrusting foraminifera, polychaetes, thecidean brachiopods and acanthochaetetids as well as a photic community with scleractinian corals, calcareous algae such as Lithophyllum and the problematic structure of Bacinella/ Lithocodium. Mud mounds are constructed by autochthonous production of micrite (automicrite). Accretionary automicrites form stromatolites and thrombolites as well as massive fabrics. Container-automicrite is restricted to protected and closed spaces. Container-automicrites of siliceous sponges reveal aphanic, peloidal and peloidal-bacterioform microfabrics. However, container-automicrite may also occur within minicaves, pockets and the interstitial space of rudstones lacking any sponge evidence. These automicrites consist of in-situ peloids and in-situ ooids forming massive and/or stromatolitic microfabrics. All automicrites, variously developed, hold 50 to 80 % of the total mud mound volume. Borings by lithopagous bivalves and sponges (Aka) and additionally the exclusive occurrence of angular mound lithoclasts provide evidence for lithification in statu nascendi. The primary mineralogy of the automicrites is high Mg-calcite with residual MgCOa-contents between 1.2 and 3.6 mole-%. The composition of stable isotopes (S13C and S18O vs. PDB) goes along with inorganically precipitated marine cements (813C: 2.9 to 3.8, S18O: -1,5 to -4). The comparative analysis of amino acid quantity reveals relative maxima of glutamin and asparagin, pyruvates and glycin as well as tyrosin. The relative amounts of amino acids are very similar to those obtained from modern automicrites of Lizard Island reef caves (GBR) and are clearly seperated from skeletal automicrites of Bacinella/ Lithocodium. In addition, biomarker analysis of accretionary automicrites resulted in a specific n-alkane pattern comparable to literature data of modern marine thrombolites (Lizard Island) and Upper Jurassic spongiolites. According to these results, the basic neccessity for mud mound genesis is the occurrence of acidic macromolecules producing a specific automicrite (organomicrite) and their persistent interaction with thesurrounding medium. Chemically, an increased carbonate alkalinity is required. Thin section analysis provides evidence that organomicrite is a widespread element of Lower Cretaceous platform margins overlapping different facies zones. These include carbonate shoal sediments with organomicrite-coated grains and deltaic sandstones with organomicrite-coated quartz grains. Further examples are intervals of stratigraphic condensation overlaying paleokarst or drowning sequences following a succession from scleractinian corals towards calcareous algae and thrombolites. On the regional scale mud mounds (organomicrite reefs) of the Soba-Region correlate with times of drastically reduced carbonate production. This, potentially caused by terrigenous input and episodes of eutrophism, leads to a dominance of the relatively ineffective production of organomicrite over the highly productive stenotopic (euphotic) communities. An increase of carbonate alkalinity can be deduced from regional scale continental weathering and from sulfate reduction on local scale. Possibly, a correlation between brines of subsoluted diapirs (Keuper) and the formation of automicrites might have existed.
    Description: thesis
    Description: DFG, SUB Göttingen
    Keywords: ddc:560 ; Unterkreide ; Paläobiologie ; Paläontologie
    Language: German
    Type: doc-type:book
    Format: 252
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