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  • 2000-2004  (1)
  • 1975-1979  (1)
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  • 1
    ISSN: 1365-3121
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Sila and Serre granitoids of Calabria were emplaced in the late Carboniferous at depths ranging from 6 to 23 km in a postcollisional extensional regime. Their fabric, which developed during and after final crystallization up to the solid state, strongly increases in intensity with emplacement depth. This relationship is attributed to the thermal history of the Calabrian basement. Cooling histories of granitoids, constrained by geological data and Rb–Sr cooling ages on micas, demonstrate that residence times of rocks at temperatures greater than those of the brittle–ductile transition vary greatly as a function of initial emplacement depth. This explains why shallow-level granitoids, that remained for about 10 Myr at temperatures above those of the brittle domain, retain their original magmatic fabric. By contrast, the strong fabrics of the deep-seated granitoids are explained by solid-state strain overprint that lasted more than 100 Myr at temperatures above those of the brittle domain.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Instructional science 7 (1978), S. 359-383 
    ISSN: 1573-1952
    Source: Springer Online Journal Archives 1860-2000
    Topics: Education
    Notes: Abstract Both active questions i.e. questions asked by subjects, and provided (or passive) questions i.e. offered to subjects as problems for solution, had been found to facilitate learning and retention of prose material when subjects were faced with a task of sufficient difficulty to challenge their competence. With difficult prose, boys and low ability subjects had gained most from active questions. These effects were more pronounced in the long term. In this study, the effects of relevant active questions i.e. questions which subjects can put alongside answers, are investigated and compared with those of active and provided questions, over a series of six presentations for both the short and the long term (i.e. after ten months). In the short term, although active questions give greater help than provided questions on the first presentation, and relevant active questions give the greatest improvement between the first and second presentations, provided questions are the most helpful overall. In the long term, however, both the active questions treatments prove to be as effective as provided questions. For low ability boys, the difference between treatments is negligble even in the short term; under the relevant active questions treatment the number of questions asked is greater; and the decline in inspection time over presentations is negligible.
    Type of Medium: Electronic Resource
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