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  • English  (2)
  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing :
    Keywords: Physical geography. ; Paleoecology. ; Evolution (Biology). ; Geochemistry. ; Earth System Sciences. ; Paleoecology. ; Evolutionary Biology. ; Geochemistry.
    Description / Table of Contents: Chapter 1-Introduction -- Chapter 2-Biogeochemical processes -- Chapter 3-Taphonomy and diagenesis of seeps -- Chapter 4-Biota -- Chapter 5-Seeps around the world -- Chapter 6-Seeps as ecosystems -- Chapter 7-Evolution of seep communities over geological time -- Chapter 8-Cognate communities.
    Abstract: This volume details the function of hydrocarbon seeps, their evolution over time, the most important seep occurrences and the fauna present in ancient hydrocarbon seeps. While several publications exist that cover modern seeps and vents, fossil seeps only constitute a small component of the literature. As such, many geologists, stratigraphers and paleontologists, as well as undergraduates and graduate students, are not very familiar with ancient hydrocarbon seep deposits and their associated fauna. This text is the first to comprehensively discuss the nature of such animal groups and how to recognize them. In addition to summarizing available knowledge on these topics for specialists in the field, this book offers the background needed to be of use to students as well as the wider community of geologists and paleontologists.
    Type of Medium: Online Resource
    Pages: XVII, 687 p. 129 illus., 71 illus. in color. , online resource.
    Edition: 1st ed. 2022.
    ISBN: 9783031056239
    Series Statement: Topics in Geobiology ; 53
    DDC: 550
    Language: English
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  • 2
    Publication Date: 2020-02-12
    Description: The geometry, kinematics, and mode of back‐arc extension along the Andaman Sea plate boundary are refined using a new set of significantly improved hypocenters, global centroid moment tensor (CMT) solutions, and high‐resolution bathymetry. By applying cross‐correlation and double‐difference (DD) algorithms to regional and teleseismic waveforms and arrival times from International Seismological Centre and National Earthquake Information Center bulletins (1964–2009), we resolve the fine‐scale structure and spatiotemporal behavior of active faults in the Andaman Sea. The new data reveal that back‐arc extension is primarily accommodated at the Andaman Back‐Arc Spreading Center (ABSC) at ~10°, which hosted three major earthquake swarms in 1984, 2006, and 2009. Short‐term spreading rates estimated from extensional moment tensors account for less than 10% of the long‐term 3.0–3.8 cm/yr spreading rate, indicating that spreading by intrusion and the formation of new crust make up for the difference. A spatiotemporal analysis of the swarms and Coulomb‐stress modeling show that dike intrusions are the primary driver for brittle failure in the ABSC. While spreading direction is close to ridge normal, it is oblique to the adjacent transforms. The resulting component of E‐W extension across the transforms is expressed by deep basins on either side of the rift and a change to extensional faulting along the West Andaman fault system after the Mw = 9.2 Sumatra‐Andaman earthquake of 2004. A possible skew in slip vectors of earthquakes in the eastern part of the ABSC indicates an en‐echelon arrangement of extensional structures, suggesting that the present segment geometry is not in equilibrium with current plate‐motion demands, and thus the ridge experiences ongoing re‐adjustment.
    Language: English
    Type: info:eu-repo/semantics/article
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