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  • 1
    Series available for loan
    Series available for loan
    Miocene extension and post-miocene transpression offshore of south-central California (1999)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: S 90.0001(1995-Y,Z)
    In: U.S. Geological Survey bulletin
    Type of Medium: Series available for loan
    Pages: getr. Zählung + 5 Kt.-Beil.
    ISBN: 0607926716
    Series Statement: U.S. Geological Survey bulletin 1995-Y,Z
    Classification:
    Tectonics
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic Properties and Petrology of Rocks near the Crest of the Mid-Atlantic Ridge (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 147-149 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The rocks examined in this study3'4 (Table 1) consist of: fresh basalts (10-85, 4-412 and 5-1); mylonized and brecciated basalts which are partially mineralogically reconstituted (2 1, 2-2 and 2-4); and greenstones (greenschist facies metabasalts) (CH-44; 3-126, 3-3 and 3-2). Values for the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/215147a0
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  • 3
    Electronic Resource
    Electronic Resource
    Petrological, Magnetic and Chemical Properties of Basalt dredged from an Abyssal Hill in the North-east Pacific (1969)
    [s.l.] : Nature Publishing Group
    Nature 223 (1969), S. 1049-1050 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Because the previous samples of the upper oceanic crust are limited to special structural features in the ocean basin, it is not yet established that the crust in the ocean is a special type of tholeiitic basalt. Samples such as that described here, from abyssal hills in the normal ocean basin, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2231049a0
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  • 4
    Electronic Resource
    Electronic Resource
    Unconformities in the sediments of the Indian Ocean (1975)
    [s.l.] : Nature Publishing Group
    Nature 253 (1975), S. 15-19 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Deep sea drilling in the Indian Ocean has revealed unconformities of oceanwide significance. The unconformities are of Oligocene, early Tertiary and late Cretaceous age and can be explained as a consequence of climatic events in Antarctica and subsequent variations in the circulation pattern of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/253015a0
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  • 5
    Electronic Resource
    Electronic Resource
    A merine seismic refraction study of the Santa Barbara Channel, California (1983)
    Springer
    Marine geophysical researches 6 (1983), S. 15-37 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Seismic data from a 186 km-long refraction profile in the Santa Barbara Channel have been interpreted using several velocity inversion techniques. Data were obtained during two cruises in 1978 and 1979. Seismic arrivals from fifty explosions of between 1 and 300 lbs. of TNT were recorded by two ocean bottom seismometers, four permanent ocean bottom stations (University of Southern California), and much of the United States Geological Survey/California Institute of Technology southern California seismic network. Travel-time inversion gives a V p of 6.3 km sec-1 at 7.2 km depth above 7.2 km sec-1 at 14.4 km depth at the western end of the channel. At the eastern end, solutions suggest three sediment refractors overlying V p of 6.4 km sec-1 at 7.3 km depth, above 7.0 km sec-1 at 11.6 km depth, above mantle arrivals with V p of 8.3 km sec-1 at 21.8 km depth. The velocity structure determined by these methods suggests that the channel has a sedimentary fill of from 4 to 7 km and a layer of mafic plus ultramafic rock 14 to 17 km thick. The greatest thicknesses of sediments are restricted to east of Point Conception. The velocity data also suggest that the Franciscan formation may not be present beneath the channel. Rather, the crust here may represent a thickened portion of the Coast Range ophiolite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300396
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  • 6
    Electronic Resource
    Electronic Resource
    Side-scan sonar mapping and computer-aided interpretation in the Santa Barbara Channel, California (1983)
    Springer
    Marine geophysical researches 5 (1983), S. 365-388 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We have experimented with digital processing of side scan sonar data taken in a 14 sq-km area of continental shelf offshore Southern California. The data were FM tape recorded during the survey and digitized and processed later in the laboratory. The digital image processing included both image correction and image enhancement. Geometric corrections were applied to correct for image distortions due to variable ship position and speed and sonar slant range. Enhancements that were tried included contrast stretching, band-pass filtering, image restoration (inverse filtering), and various edge enhancements such as density slicing and standard deviation filters. Interpretive procedures were also attempted and included digital mosaicking, stereoscopic viewing, and falsecolor display. The most effective processing was geometric correction combined with contrast stretching. Mosaicking proved difficult due to imprecise navigation (±50 m), but was very effective in increasing the understanding of the geologic structure in the survey area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305389
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  • 7
    Electronic Resource
    Electronic Resource
    A geological transect across the crest of the East Pacific Rise at 21°N latitude made from the deep submersible ALVIN (1985)
    Springer
    Marine geophysical researches 7 (1985), S. 467-488 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper is a report of geological observations made using the submersible ALVIN on the crest of the East Pacific Rise near 21°N. The profile is 6 km long and crosses a 5–10 km wide plateau which rises 100 m±above the rise flanks. At the axis are exposed fresh glassy pillow lavas with no sediment accumulation in a region termed the neovolcanic zone. This zone is about one kilometer wide and includes elongate ridges of pillow lavas and seventeen hydrothermal vent fields in the study area. Outside the neovolcanic zone the seafloor is extensively fissured in another zone which is up to two kilometers wide. The neovolcanic zone and the fissured zone are included within a rift valley or graben about 3 to 5 km wide and 50 m±deep. This rift valley is asymmetrically located on the west side of the axial plateau; the neovolcanic zone in the study area is asymmetrically located on the east side of the rift graben. Fissured crust is not common outside the rift graben or in the neovolcanic zone; similarly, large throw faults such as those which form the edges of the graben are not found outside of it. These observations can be interpreted according to a volcanic-tectonic cycle in which volcanic eruptions and hydrothermal circulation are followed by a tectonic phase which includes fissuring and vertical movements. When a new cycle starts it may involve a lateral shift of the spreading axis. Lavas along the dive profile are suggested to be no older than a few thousand years based on sediment accumulation. In contrast, seafloor spreading rates here predict crust up to 105 yr old. This observation suggests that lavas from the neovolcanic zone can spread laterally about a kilometer or more and overlap on older crust.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368951
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  • 8
    Electronic Resource
    Electronic Resource
    The sea-floor spreading history of the eastern Indian Ocean (1982)
    Springer
    Marine geophysical researches 5 (1982), S. 225-247 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The geologic history of the eastern Indian Ocean between northwest Australia and the Java Trench is known to involve two separate events of rifting and sea-floor spreading. Late Jurassic spreading in the Argo Abyssal Plain off northwest Australia was followed by Early Cretaceous spreading in the Cuvier and Perth Abyssal Plains off west Australia. However, the evolution and interaction of these events has not been clear. Mesozoic sea-floor spreading anomalies have been identified throughout the Argo Abyssal Plain that define a rifting event and subsequent northward spreading on the northwestern Australian margin at 155 m.y.b.p. Magnetic anomalies northwest of the Argo Abyssal Plain indicate a ridge jump to the south at about 130 m.y.b.p. that is approximately synchronous with east-west rifting along the southwestern Australian margin. The Joey Rise in the Argo Plain was probably formed by volcanism at the intersection of this new rift and the spreading ridge to the north. The southern and northern spreading systems were connected through the Exmouth Plateau which was stretched and faulted as spreading progressed. The RRR triple junction was formed at the intersection of the two spreading systems and appears to have migrated west along the northern edge of the Gascoyne Abyssal Plain. Spreading off northwest Australia cannot be easily related to simultaneous spreading in the west central Pacific via any simple tectonic scheme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00305562
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  • 9
    Electronic Resource
    Electronic Resource
    Investigation of faulting and abyssal hill formation on the flanks of the East Pacific Rise (21°N) using ALVIN (1985)
    Springer
    Marine geophysical researches 7 (1985), S. 515-535 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A wealth of geologic information has been collected during studies of the Matuyama/Brunhes magnetic reversal boundary on the East Pacific Rise at 21°N. Five ALVIN and two CYANA dives, and a series of deep-tow traverses show that abyssal hills in this region of the Pacific are created near the spreading axis by inward dipping normal faulting and by back-tilting of these fault blocks. Outward dipping faults occur but are of less importance in the creation of relief. Tectonic disruption of the crust, particularly through tilting, is less pronounced than in the Atlantic. Small volcanoes approximately 50 m high and 400 m wide are common on the abyssal hills. A significant number of the volcanoes may have split apart at the spreading axis attesting to the narrowness of the crustal accretion zone on the East Pacific Rise. Active faulting is restricted to less than 10 to 12 km off-axis, although minor recent faulting may have been detected 23 km off-axis. Crustal sections exposed by faulting reveal that massive lava flows and sheet flows are common in the upper portion of oceanic layer two, but are less abundant than pillow lavas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00368953
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  • 10
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    The Crest of the East Pacific Rise (1981)
    Springer Nature
    Details
    Publication Date: 1981-05-01
    Print ISSN: 0036-8733
    Electronic ISSN: 1946-7087
    Topics: Biology , Natural Sciences in General , Physics
    Published by Springer Nature
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