Characteristics of Paleotsunami Sediments, A Case Study in Cilacap and Pangandaran Coastal Areas, Jawa, Indonesia

Authors

  • Yudhicara Yudhicara Geological Agency, Jln. Diponegoro No. 57, Bandung, 40122, Indonesia
  • Y. Zaim Bandung Institute of Technology, Jln. Ganesha 10 Bandung, Indonesia
  • Y. Rizal Bandung Institute of Technology, Jln. Ganesha 10 Bandung, Indonesia
  • Aswan Aswan Bandung Institute of Technology, Jln. Ganesha 10 Bandung, Indonesia
  • R. Triyono Agency for Meteorology, Climate and Geophysics (BMKG), Jl. Cemara No. 66, Bandung, Indonesia
  • U. Setiyono Agency for Meteorology, Climate and Geophysics (BMKG), Jl. Cemara No. 66, Bandung, Indonesia
  • D. hartanto Agency for Meteorology, Climate and Geophysics (BMKG), Jl. Cemara No. 66, Bandung, Indonesia

DOI:

https://doi.org/10.17014/ijog.8.4.163-175

Keywords:

beach sediments, tsunami deposits, paleotsunami, grain size, fossil analysis

Abstract

DOI: 10.17014/ijog.v8i4.166

A paleotsunami study having been conducted in 2011 took two study cases in Cilacap and Pangandaran coastal areas. These two regions have been devastated by tsunami in the past and had the most severe damaged on 17 July 2006. Trenching, beach profiling, and sediment sampling had been carried out, and further analysis at the laboratory had been done, such as grain size and fossil analyses and dating. In Cilacap, an iron sand layer was found as a key bed suspected as a paleotsunami deposits due to the content of anthropogenic fragments. In Pangandaran, two layers of tsunami deposit candidates were found having thickness of 5 - 6 cm at the top as a 2006 tsunami deposit candidate, and 5 - 10 cm at the bottom as a paleotsunami deposit candidate. Both grain size and fossil analysis results could explain that Pangandaran’s sediments are tsunami deposits while Cilacap’s ones are assumed to be deposited by another process rather than a tsunami.

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Published

28-12-2013

How to Cite

Yudhicara, Y., Zaim, Y., Rizal, Y., Aswan, A., Triyono, R., Setiyono, U., & hartanto, D. (2013). Characteristics of Paleotsunami Sediments, A Case Study in Cilacap and Pangandaran Coastal Areas, Jawa, Indonesia. Indonesian Journal on Geoscience, 8(4), 163–175. https://doi.org/10.17014/ijog.8.4.163-175

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