32. Ridai, O. 
Hungary 
THE TRACE BACK OF THE GEOMORPHOLOGICAL DEVELOPMENT OF THE 
MUELA PLATEAU - ZARAGOZA, SPAIN 
The Muela plateau is not only one certain **mesa", it is a special type of uplifted and more or less dissected 
sequence of mainly Miocene sediments. The area is lithologically rather simple. The top "paramo"' limestone, 
Miocene, is thin-layered and interbedded by marl and gypsum. It seems to be simple in tectonical and 
geomorphological aspects also. 
The plateau is surrounded by the Ebro River in NE, and by two tributaries, the Huerva and the Jalon in the 
SE and NW, respectively. In the SW only a temporary watercourse does exist for all the other permanent rivers 
are allochtonous. 
The climate is semiarid, and so the “natural” vegetation is sparse. During the analysis of the drainage patterns, 
to be seen on the airphotos, it turned out that in contrary to the former opinions, the whole area has an 
integrated drainage system. The drainage pattern is mostly clearly determined by structural lines and in 
particular, always closed units could be distinguished along the main valleys. The lower points of these units 
do indicate the stages of the dissection of the plateau. 
In total accordance with the formation of six river terrace levels, several glacis and filled up valleys, the 
complete geomorphological history of the plateau, could be reconstructed. All the statements of the 
interpretation were justified during the field-check. 
The old high terraces and the connected steps of dissection indicate Pleistocene climate changes. The fill of the 
valleys and their young incision is Holocene. 
22 
Remeyn, J.M. 
de Kock, R.B. 
Stellingwerf, D.A. 
Netherlands 
INFRARED FILM FOR VITALITY STUDIES OF 
NORWAY SPRUCE AND AERIAL THERMOGRAPHS 
FOR FOREST DISEASE DETECTION IN 
THE NETHERLANDS 
Abstract not provided. 
34. Schmidt-Falkenberg, H. 
Germany (F.R.G.) 
EXPERIMENTAL RESEARCH IN PHOTO-INTERPRETATION 
The Working Group has performed experimental research on the methodology of photo-interpretation. The 
present program "'Integral Photo-Interpretation" has been started in October 1970. At present 56 scientists 
from various technical fields (and from ten countries) participate in the experimental work. In the report of 
the Working Group, at first, general explanations of the problem are given. It is the aim of this research to 
determine a) whether in case of specific (mostly very complex) objectives of interpretation, the amount and 
value of information obtained by interpretation and its reliability (likelyhood) can be increased by a certain 
methodical procedure e.g. by integral interpretation, and b) which and how much information a certain group 
of interpreters can derive from an aerial photograph. The results of such research will probably be also of 
interest for the automated interpretation of aerial photographs. After listing some publications on the subject 
under research and after informing on the program, the author gives a review on the state of work, on the 
sequence of interpretations, and on the interpreters participating. 
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