Type:  Bidirectional Core

Location: Moondah Lake, Queensland

Age: 

Material: 

MoST ID: 6458

Pedestal Link: https://une.pedestal3d.com/r/3-MXRY7fK9

Model Author:  Chris Gillard

This large bidirectional silcrete core was made on a flake, and is from southwest Queensland.  It was collected during a collaborative research project between archaeologists and Traditional Owners to better understand the deep history of the Mithaka People.

Artefact on loan to Archaeology and Palaeoanthropology, University New England, catalogue name ML23 BHC Lower, Area D.

See the annotations for technological details about this stone tool.



A common quarrying strategy in Australia was to make large flake blanks from cobbles and boulders at the stone source.  This provided pieces of stone with ideal platform angles for further reduction.

The core in this model was made on an extremely large flake blank created by direct percussion on a boulder core.  The blank was first reduced by striking blows onto the blank’s ventral surface, removing flakes from the dorsal surface.  Blows were struck well-back from the platform edge, resulting in large flakes.  Two blows embedded cracks into the stone.  The core was then rotated, and flakes were struck from the base of the core towards the opposite platform surface.  Reduction occurred in two directly opposed directions, and the core is referred to as ‘bidirectional’.  The flakes were probably carried away from the quarry to use as blanks for tools.



Brokehimarm Cave is located near Moondah Lake at an elevation of around 80 metres. The site complex has a number of silcrete outcrops on the top of the low relief escarpment, but this artefact was found in an extensive scatter approximately 100 metres long and 20 metres wide immediately below the cave. The material looks very similar to the material in the outcrops above the cave site. There are a number of other features in the landscape nearby including a large stone arrangement, possible initiation circles, knapping floors, earth ovens, and potential gunyah (hut) remains.