The research area is located in central java province, precisely in the Cikakak area of Banyumas regency. The area of the research area is 3 x 2.5 km, which is the focus of this research is the Halang Formation, the halang resebar formation is quite wide on the island of java, so it is very interesting to do further research. There are six formations in the research area, namely the pemali form…