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On
the possibility of determining the age of fluvial terraces from the magnitude of
the disintegrated layer in alluvium pebbles.
ISSN
0367-4290. Geol.journ. 1990. No. 5
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Summary:
A mathematical model of the process of weathering in alluvium pebbles is
proposed. On the basis of this model a dependence is found for determining the
time of formation of the disintegrated layer in medium sandstone pebbles and
andesite-basalt Crimean terraces. The age of alluvial deposits on different
terrace levels of the
Alma
river is given as an example.
The age is determined from the magnitude of the disintegrated layer in pebbles.
Full
version in Russian (365 kb)
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Evolution
of the planetary intensity fields within seismoactive regions of Ukraine, most
recent fractures and shiftings
Geodynamics
of the Crimean Black Sea region. - Simferopol, 1997.
UDK
550.34 |
Summary:
Appearance of the naturally oriented diagonal and orthogonal fracture systems in
the Earth's crust is determined by the influence of the planetary systems of
tectonic intensity fields. The paper highlights the reasons of appearance of
such intensity fields, kinds of their symmetry, peculiarities of redistribution
of stresses and deformities during shiftings and other aspects of fracture
formation processes. Change of the intensity fields time-wise is substantiated
and characteristics of kinematic paragenesis of subvertical shear fractures (fracture
structures) of the Crimea and the Carpathians are given. Full
version in Russian (1226 kb)
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