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Stone tools from mid-pleistocene sediments in java.

T Jacob, R P Soejono, L G Freeman

Science (New York, N.Y.)

|November 24, 1978

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Two stone tools were discovered in mid-Pleistocene Java deposits. These findings represent the earliest in-situ evidence of hominid tool use in the region.

Area of Science:

Paleoanthropology
Archaeology
Geology

Background:

Mid-Pleistocene channel fills at Sambungmachan, Java, previously yielded hominid remains and fauna.
Previous discoveries indicated hominid presence but lacked in-situ artifactual evidence.

Purpose of the Study:

To report the discovery of in-situ stone tools in mid-Pleistocene deposits on Java.
To establish the earliest archaeological evidence for hominid activity in this specific Javanese region.

Main Methods:

Excavation of mid-Pleistocene channel fills.
Stratigraphic analysis of artifact-bearing deposits.
Faunal analysis for chronological dating.

Main Results:

Discovery of a chopper and a retouched flake in primary depositional context.

Related Experiment Videos

Association of artifacts with a mid-Pleistocene fauna.

Confirmation of in-situ placement of tools within the channel fills.

Conclusions:

The Sambungmachan artifacts represent the first in-situ stone tools from mid-Pleistocene Java.
These findings provide crucial evidence for early hominid technological capabilities and presence in Southeast Asia during the mid-Pleistocene.