Located about 75 km NW of Cue. A small quarry in a porphyritic dolerite used for an ornamental stone, sold commercially as 'marshmallow rock'.
Former plagioclase megacrysts (to 40 mm across) in the dolerite have been saussuritised and now consist of finely intergrown pink clinozoisite (Mn-bearing), albite and locally quartz. These are in places crosscut by later epidote veinlets. The dark-green groundmass is altered to intergrown actinolite, albite and clinozoisite, sericite and fine-grained
titanite. Trace quartz and rare patches of apatite are also present.

The deposit is part of a steep dipping, north-east trending dyke, 500 metres long and variable thickness from 5 to 25 metres. It was mined across 1999 to 2004 by D. Caesar, from several small pits at the north-east end of the dyke. Some specimens have been seen, including slabs, spheres, and carvings from this period.

On the surface the dolerite is grey with a reddish brown oxidised coating, containing numerous golf ball-shaped megacrysts of pale pink saussuritised plagioclase, considerably harder than the surrounding matrix. There are zones where the megacrysts are more irregular and smaller.

The material has also been given names like Spotted Cat Rock and Native Cat Rock.

The Mindat co-ordinates are approximate.

Other Regions, Features and Areas containing this locality

References