ABSTRACTS / RESUMES - Comitato Glaciologico Italiano

This software makes photographic record as well as orientation
of photographs for coordinate calculation easier. Also
mapping makes use of computer equipments for digital
map output, while geomorphological data processing, toghether
with all thematic data heplful for regional management
inside Gis, is facilitated just by the format (vector or
raster) of monitorated data.
Authors produce the first results coming from the application
of cited systems. The aim is to create a sound support
to the management of areas affected by strong landslides
hazards like the region Molise (Central Italy) covering
4,400 krn. The first application stage has been carried out
using panchromatic aerial photographs (scale 1:70,000) having
a high ground resolution (about 60 em under average
contrast condition). Photogeological investigation covering
the whole regional area allowed to locate, analize and map
(at a scale 1:50,000) more then 600 landslides, mostly still
active and negatively influencing man's presence. Phenomena
are distributed with a high density (see figure) over
all areas where clayey-sandy and variegated clays outcrop,
and in general where vertical or horizontal facies changes
and highly tectonized outcrops occur. These landslides are
poorly widespread in areas with smoother morphology,
towards the Adriatic Sea, and on clearly lithoid calcareous
rocks. Phenomena show a medium distribution on arenaceous,
marly and calcarenitic rocks. For some present
landslides, for which a recent morpho-evolutive stage has
been recognized, comparing then with previous aerial photographs,
monitoring by means of aerial and terrestrial digital
photogrammetric mapping as been started. First data,
as they are georeferenced, represent the first map of the
data base required for the management of landslides of
Molise inside Gis to a complete advantage of a prompt and
quick updating, and necessary for an integration also with
data of different typology.
ALESSANDRO BIASINI 1, CLAUDIO CAPUTO 1,
MIRCO MENEGHEL 2 & MARIA CRISTINA SALVATORE1
First geomorphological data of the Mount Murchison
Quadrangle (Victoria Land, Antarctica), mapped at
1:250,000 scale byaerial photographs and satellite images
Dipartimento di Scienze della Terra, Universita di Roma La Sapienza,
p.le A. Moro 5,00185 Roma, Italy
Dipartimento di Geografia, Universita di Padova,
via del Santo 26, 35123 Padova, Italy
Within the research project «Glaciology and Paleoclimate»
of the Italian National Antarctic Research Programme
(Pnra) for several years various studies are being carried on
with the aim of characterizing the geomorphology of Vic-
toria Land and in particular for the study of glacial processes
and of the climate and environmental history of our
planet. An important contribution to the knowledge of
these regions and to the reconstruction of climatic changes
comes from investigations on reliefs and glacial covers, as
well as from the compilation of thematic maps, above all if
one considers that mapping of these regions is very poor.
In this context, some research groups of the Pnra are
carrying on, since several years, a wide programme of researches
directed towards the drawing of thematic maps
(particularly geomorphological maps) being both synthetic
and detailed. Among these the drawing of a series of geomorphological
maps of Victoria Land at a scale 1:250,000
is programmed, the result of the cooperation of several researchers.
Till now the geomorphological map of the
Mount Melbourne Quadrangle has been compiled.
This poster shows the first morphological data of the
Mount Murchison Quadrangle (fig. 1), which have been
obtained mainly from the interpretation of the Trimetrogon
Antarctica stereoscopic aerial photographs taken by
the US Navy during the Fifties and Sixties, and, subordinately,
from the interpretation of satellite imagery and field
checks for some areas. Data have been mapped on a Landsat'
satellite image which had been processed at the Enea­
Casaccia laboratories by M. Frezzotti; the geometrical correction
and the georeference of the image have been made
by means of ground control points which were acquired by
L. Vittuari of the Disart (University of Bologna) by using
Gps receivers during the XII Antarctic Italian Expedition.
The mapped area covers about 15,000 km 2 between 73°S
and 74° Sand 162° EGW and 166°33' EGW. Large glacial
valleys holding very big glaciers highlight and define the
main mountainous domains. The Priestley and Campbell
glaciers delimitate the northern sector of the Deep Freeze
Range, a large mountainous domain running NNW-SSE;
the summit of these reliefs is a sort of plateau reaching its
maximum elevation with Mount Hewson (3720 rn), while
the northeastern part of these reliefs shows a typical alpine
morphology with valley glaciers, cirques and horn; some
other sectors are characterized by glacial deposits and large
supraglacial debris covers. More to the north follow the
tabular reliefs of the Mesa Range (peculiarly shaped structural
reliefs), bordered to the east by the Rennick Glacier,
at whose feet frequent supraglacial debris often show complex
dynamics. Between the Campbell and the Aviator glaciers
extend the Southern Cross Mountains almost completely
covered by snow and ice except for some isolated
and small rock outcrops. To the east follow the Mountaineer
Range from which stand out the twin peaks of Mount
Murchison (3501 m): this range show an alpine-like
morphology being well developed and enlivened by several
local glaciers. Volcanic edifices may be recognized in the
northernmost parts of this area (f.e. Mount Overlord).
In the map geomorphological symbols are grouped according
to the main processes: glacial, periglacial, aeolian, marine'
structural, weathering and due to gravity; glacier features,
hydrography and lithology are also mapped.
Morphographic and lithological sketch maps have been also
produced. Data coming from direct surveys and from
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