Sangiran Stratigraphy was formed by soil layers for more than 2.4 millions of year, and until today, uninterruptedly deposited. It is the most complete stratigraphy in Asia Continent. The order of Sangiran stratigraphy, from the oldest to the youngest are Kalibeng Formation, composed by the blue marine clay sediment ( 2,4 – 1.8 mya), black clay sediment known as Pucangan Formation (1,8 – 0,9 mya), in the upper part is calcite cemented conglomerates, called as grenzbank (0,9- 0,73 mya) cross bedding-structure of Kabuh Formation sand (0,73 – 0,25 mya), volcanic sediment of Notopuro Formation (0,25 mya – 11.000 years ago), terrace sediment and alluvial sediment (11.000years ago-today). (Suwita Nugraha, Wulandari, Iwan SB)
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