Karst Morphology of Karangbolong Area, Java-Indonesia

  • Eko Haryono Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
  • Sutanto Trijuni Putro Faculty of Natural Resources Technology, Yogyakarta Institute of Technology
  • Suratman Suratman Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
  • Sutikno Sutikno Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
Keywords: Southern Java, Karangbolong karst, polygonal karst, tropical geomorphology

Abstract

The Karangbolong karst is situated in the southern zone of Java where Miocene limestone has been uplifted and has experienced karstification since the late Pliocene. The research documented here aims at exploring morphological characteristic of the area. Special interest is attributed to differentiation of valley or depression morphology, conical karst morphology, and the roles of jointing system and uplift history in their development. The morphology investigation was mostly undertaken using aerial photograph visual interpretation of panchromatic aerial photograph and analytically shaded DEM, as well as field observations. The results show that the general morphological features of Karangbolong karst are characterized by aligned valleys and aligned enclosed depression with three different patterns. The orientation of the valleys and enclosed depressions coincide with the structural pattern of the area, indicating that the formation of aligned valleys and aligned enclosed depressions is preferential dissolution through jointing. The residual hills are typified by conical karst morphology with sharp peaks. It is found that tight joint spacing appears to be the main reason for the sharp peak of the conical hills. Asides from jointing system, morphology of the area is likely governed also by topographical position and gravity sliding of the limestone bed during the uplift. Uplift history has important control on the differentiation of morphology between plateau part and sloping part. Limitation of this research is that the aerial photograph was not rectified well, because the analyses in this research were more on pattern identification. More accurate rectification is needed for better morphometric analyses.
Key words: Southern Java, Karangbolong karst, polygonal karst, tropical geomorphology.

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Author Biographies

Eko Haryono, Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
Ass. Professor. Department of Geography and Environmental Science
Sutanto Trijuni Putro, Faculty of Natural Resources Technology, Yogyakarta Institute of Technology
Departement of Marine Engineering
Suratman Suratman, Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
Proffesor. Department of Geography and Environmental Science
Sutikno Sutikno, Karst Research Group, Faculty of Geography, Gadjah Mada University, Bulaksumur, Yogyakarta, Indonesia
Professor (emeritus). Department of Geography and Environmental Science
Published
2017-07-04
How to Cite
1.
Haryono E, Putro ST, Suratman S, Sutikno S. Karst Morphology of Karangbolong Area, Java-Indonesia. AC [Internet]. 2017Jul.4 [cited 2020May31];46(1). Available from: https://ojs.zrc-sazu.si/carsologica/article/view/3589
Section
Original papers