A geofact is a naturally formed stone
Rock (geology)
In geology, rock or stone is a naturally occurring solid aggregate of minerals and/or mineraloids.The Earth's outer solid layer, the lithosphere, is made of rock. In general rocks are of three types, namely, igneous, sedimentary, and metamorphic...

 formation that is difficult to distinguish from a man-made artifact
Artifact (archaeology)
An artifact or artefact is "something made or given shape by man, such as a tool or a work of art, esp an object of archaeological interest"...


Several purported ancient artifacts, such as the Venus of Berekhat Ram
Venus of Berekhat Ram
The Venus of Berekhat Ram is a pebble found at Berekhat Ram on the Golan Heights in the summer of 1981 by archaeologist N. Goren-Inbar of the Hebrew University of Jerusalem. An article by Goren-Inbar and S...

 and the Venus of Tan-Tan
Venus of Tan-Tan
The Venus of Tan-Tan is an alleged artifact found in Morocco.It and its contemporary, the Venus of Berekhat Ram, have been claimed as the earliest representations of the human form.-Description:...

, are instead thought by many in the archaeological community to be geofacts. Two sites which show an abundance of what are likely geofacts are Calico Early Man Site
Calico Early Man Site
The Calico Early Man Site is a series of stone tool workshop and quarry sites located near Barstow in San Bernardino County in the central Mojave Desert of southern California...

 and the Gulf of Cambay.
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