Interpretation of the Geomorphological Development of the Volcanic Field in the South and Southwest of Isparta with Lineament and Circularity Analysis
Abstract
The research area is one of the young volcanic fields in Anatolia which is located in Isparta city and vicinity. The high field, which borders the Isparta plain from South, Southwest and partly the West, is the result of Plio-Quaternary volcanism. The andesite and trachyandesitic lavas, which were exposed by explosive volcanism in different phases, did not move further away from the exit centers and it formed a high mass by accumulating layer by layer. During the volcanic activity, along with the lava, there were also outlets of pyroclastic material in almost every period of volcanism. The thickness of the pyroclastic layers decreases as they move away from the center of the volcanism. The pyroclastics spread over a wide area which is seen in the sequences of sediment accumulating at distances as long as 45-50 km from the center of volcanism. Andesitic and pyroclastic cones, calderas and dykes are common landforms of very young volcanic topography in the region. In this study; according to the results of lineament and circularity analysis, it was aimed to determine, diagnose and map the geomorphological features of the volcanic field outlined above. For this purpose, through using Geographic Information Systems (GIS) and Remote Sensing (UA) Technologies; Relative Topography Position Index, Curvature Analysis, Lineament Analysis, Circularity analysis were performed. For these analyses, data were generated from LandSat TM, SRTM, ASTER-DEM satellite images and 1/25 000 topography maps. The results of the morphometric analysis have enabled the identification, recognition and mapping of the land forms of the volcanic topography, which are characterized by linear ridges, concave and convex slopes in the studied field. The results were tested and verified in the field.
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Kaynakça
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