ABSTRACTS / RESUMES - Comitato Glaciologico Italiano

een drawn by photogrammetry, From the image the reader
can argue the characteristics of the ground (bare rock,
debris, snowfields, ice, water,...). The symbols are grouped
and classified in colour classes according to the main geomorphic
processes. They were mapped using both photoand
satellite image- interpretation and prolonged field surveys
carried out during antarctic expeditions since 1985.
CARLO BARONI 1, GIUSEPPE BRUSCHI 1
& JERONIMO L6PEZ-MARTINEZ 2
Antarctic geomorphological maps
1 Dipartimento di Scienze della Terra, Universita di Pisa,
via S. Maria 53, 56126 Pisa, Italy
2 Departamento de Geologia, Facultad de Ciencias,
Universidad Aut6noma de Madrid, 28049 Madrid, Spain
The geomorphological maps and the geomorphological
sketches related to the Antarctic territory have been collected
and analysed. Of 271 geomorphological cartographic
documents only ten can be classified as geomorphological
maps sensu stricto (r.r.), On the basis of the graphical representation
adopted and of the importance given to origin
of landforms, morphograpy and lithology, the geomorphological
maps s.s. were grouped as follows:
- morphostructural small scale maps that picture the whole
Antarctic continent (1 document);
- morphogenetic-morphodinamic maps that depict the
most important landscape components differentiated with
colours on the basis of different morphogenetic origin; active
and relict landforms are also distinguished and chronological
information are supplied where available (4 documents);
- morphochronological maps that emphasized with different
colours the chronology of landforms and deposits represented
(2 documents);
- geomorphological-morphographic maps that differentiate
areas where different geomorphological processes are,
or were, active; morphographic information is also supplied
(3 documents).
A different group of maps regard the geomorphological
thematic selected maps (6 documents). They differ from
the geomorphological maps s.s. because they show a limited
number of geomorphological themes. Those maps are
clearly produced to study one particular scientific problem
(i.e. glacial history).
Furthermore, We have considered the detailed sketches of
small size that describe the geomorphology of a certain
area (30 documents). These latter, defined geomorphological
sketch maps, are different from geomorphological maps
due to their smaller size and the absence of well-organised
topographic data (generally only spot heights are indi-
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cared). Finally, 225 thematic sketches and location maps
with geomorphological information have been analysed.
The structure of the Antarctic geomorphological maps is
highly discordant: the discrepancies mainly lay in the definition
of legends, due to a different importance given to
the morphogenetic processes, the structural characteristics
of investigated area and to the chronology of the events.
These differences reflect the points of view of various geomorphological
schools, and are also a function of scale of
representation and local characteristics of the areas surveyed.
Of the ten geomorphological maps s.s. analysed (scale variable
from 1:20,000 to 1.15,000,000), five regard East Antarctica,
two West Antarctica, two the Subantarctic Island
of South Georgia and one includes almost the whole continent.
Excluding this last map, the others cover 17,686
km',
Interest in the production of geomorphological maps has
recently grown testifying to the important role that the
geomorphological cartography has in Antarctica, both as
a method of basic research, as a method of representation
and analysis of the landscape, as a support for other
research, and as base documents integrated in systems of
geographical information (Gis). A deeper confrontation
between the researchers working on Antarctic geomorphology
is therefore necessary for convenience in
utilizing comparable if not compatible and integrated
legends.
CARLO BARONI 1 & ALBERTO CARTON 2
The AdameIIo Group (Central Alps, Italy):
geomorphological map and Holocene glacier variations
1 Dipartimento di Scienze della Terra, Universita di Pisa,
via S. Maria 53,56100 Pisa, Italy
2 Dipartirnento di Scienze della Terra, Universita di Torino,
via Accademia delle Scienze 5, 10125 Torino, Italy
The 1:50,000 geomorphological map of the Adamello massif
prepared in accordance with the guidelines for such
maps elaborated by the Italian National Geological Service
in 1994 is presented. It was originally drawn to the
1:10,000 scale and summarises the results of investisations
carried by the writers over the last ten years (Baroni &
Carton, 1987, 1990, 1991a, 1991b, 1992 and 1996, in
press; Baroni & alii, 1993). The glaciological data collected
during the surveying work have resulted in a very detailed
representation of the changes that have taken place in most
of the local glaciers. Exact mapping of the present glaciers
and application of the accumlulation/total area ratio
method have enabled their equilibrium line altitude to be
compared with that for the Little Ice Age, as reonstyructed