Geomorfologi Tanah Pada Transisi Geologi Formasi Wonosari dan Nglanggran di Kecamatan Purwosari Gunungkidul Yogyakarta

The transition zone of the Wonosari and Nglanggran Formation in Purwosari District has characteristics thick soil, steep slopes, no outcrops. different found Zone are characterized by polygonal karst formations with thin soil limestone rocks, form andesite rock outcrops, slopes. Geomorphological mapping can be done easily through morphological approaches is quite difficult to do because it does not have outcrops interpret from morphology. Soil geomorphological approach needs define landform units for areas that dan purpose this study was map distribution geological zone. methods used identify delineation survey. obtained aerial photographs. results landforms photographs detailed surveys. using photography produce high resolution, smooth, firm compared other sources. photos two landforms, hills, formation andesitic rocky formation. There a transitional TP7 sample color change dark brown (karst) light (old volcanic). thickness old volcanic more than 1 meter deeper (< 60 cm). three horizons A, B, B/C which classified as developed region (A B horizons). texture clay silt, while dominant area clay.