Two stone tools (a chopper and a retouched flake) were found in mid-Pleistocene channel fills at Sambungmachan (Java), which earlier yielded a hominid skull cap with characteristics of Solo man and a Trinil-like fauna. The artifacts are the first discovered in place in deposits on Java that are assigned to the mid-Pleistocene on faunal grounds.
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Jacob et al. (1978) studied this question.
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