ABSTRACTS / RESUMES - Comitato Glaciologico Italiano

aerial photography data base with a resolution of less than
one meter which can be used to compare, photogrammetrically,
new aerial surveys to evaluate possible terrain displacements
anywhere in the country.
NATALIA P. GERASIMENKO
Indication of the Pleistocene river terraces
in the Northern Ukraine
Department of Paleogeography, Institute of Geography of Ukrainian
Academy of Sciences, Volodymyrska str., 44, 252034 Kiev, Ukraine
Alluvia of the 7 Pleistocene terraces exposed in outcrops
and boreholes in the Dnieper and its tributaries basin
around Kiev have been investigated as well as morphometric
parameters of the terraces. To recognize the characteristicfeatures
of each terrace alluvia are very important for
the determination of possible subsequent distortion of terrace
surfaces.
Substantial differences between alluvia of the cold and
temperate Pleistocene intervals firstly described by Goretsky
(1970) have been also observed in the investigated region.
Alluvia formed in the temperate intervals show more
specific features characteristic of each individual terrace
unit.
The Early Pleistocene temperate alluvia form lower parts
of the vn-, vr h and v: terraces and are up to 35 m thick.
In the vn- terrace with the base 10-15 m above modern
alluvia floor the coarse basal facies are poorly represented
and the oxbow sediments form up to 60 % of the alluvia.
Temperate alluvia of vr' terrace, 20-25 m above the base
of recent alluvia, frequently overlie the older terrace. Overbank
floodloams build up to 50% of the alluvia body. Base
of the v: terrace alluvia are close to that of the recent
ones. The floodloam facies are infrequent while the coarse
basal facies and channel crossbedded sands are well developed.
Oxbow facies are also presented.
Alluvia of the Mid-Pleistocene temperate stages in the
lower parts of the IV th and IIr d terraces are about 15 m
thick and lie some 15-20 m above the floor of recent alluvia.
About 45 % of temperate alluvia thickness of IV th terrace
are of the coarse erosional facies. The rest is presented
by channel crossbedded sands while floodloams and oxbow
facies are absent. The temperate alluvia of IIr d terrace,.on
the contrary, has only about 25 % in the coarse basal
facies and up to 50 % in the overbank floodloam facies.
The Late Pleistocene temperate alluvia of the lInd and r t
terraces are up to 10 m thick. Base of the former is some
5-10 ill above and the latter at about the same level as the
recent alluvia floor. All facies are well developed while the
overbank facies form about 75 % of the latter. Coarse basal
facies are less developed in the I" terrace alluvia.
Alluvia of the cold stages form the upper parts of the terrace
bodies frequently overlying the alluvia of the warm sta-
ges. Cold alluvia units are very much alike and presented
by the poorly sorted thick sands and loams of so called periglacial
facies. Those of the v: and vrh terraces are of the
fluvioglacial type.
DAVID P. GILES & MALCOLM C.Z. WHITWORTH
Periglacial geohazard prediction utilising remotely
sensed imagery, geomorphology and piezometry
Department of Geology, University of Portsmouth, Burnaby Building,
Burnaby Road, Portsmouth, POI 3QL, UK
With the advent of Geographical Information Systems
(Gis) the applied geologist is provided with a powerful interpretive
and visualisation tool. These systems allow the
integration and manipulation of multiple data sets that are
referenced in the spatial domain. This paper will present
work that is being undertaken in integrating remotely sensed
imagery, geomorphological maps and substantial piezometric
data available from a borehole ground investigation
programme to detect, delineate and interpret active
and relict periglacial solifluction and landslide features.
Much of southern Britain has been affected by intense periglacial
activity as a result of several major ice advances
during Quaternary glacial stages. The project area for
this research is located north of the village of Broadway in
the Cotswold Hills, an area which was adjacent to the
maximum extent of these ice advances. As a result the
area experienced severe periglacial conditions resulting
in frost shattered bedrock, considerable solifluction and
major landsliding. The geotechnical and geomorphological
aspects of these features and their associated deposits give
rise to significant engineering geological problems. These
periglacial landforms and landslides are deemed metastable
under normal conditions due to the presence of extensive
shear planes which can be reactivated, potentially initiating
subsequent failure of the slopes. This area is of particular
interest as a road by-pass scheme is being proposed
for the village of Broadway with the route running directly
across many these features.
Geologically the study area is located within the northern
Cotswolds and is underlain by Lower Jurassic strata of
Lias age. The area comprises of Lower, Middle and Upper
Lias overlain by Middle Jurassic Inferior Oolite which outcrops
beyond the initial study area. The regional dip is approximately
horizonal and the area is faulted. The geological
sequence consists. of interbedded siltstones, sandstones
and limestones all of which are prone to mass movement.
The Lower Lias strata generally has a high moisture content
and it's boundary is delineated by a marked spring line
with the contact between the permeable Middle and relatively
impermeable Lower Lias. The area displays both
solifluction movements as well as rotational and shallow
translational type landslides.
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