MARILLANA CONGLOMERATE (POLISHED SLICE) - Western Australia
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Large cut and polished slice of this unusual rock. Polished on one side.
Large cut and polished slice of this unusual rock. Polished on one side.
Marillana Station, Pilbara region, Western Australia
A conglomerate is a rock containing rounded fragments naturally cemented together. In this case the fragments consist of many different rock types and the rock is known as a polymict conglomerate.
It was formed by rapid deposition of sediment in a valley erodng ancient Precambrian rocks. The rock types present include banded ironstone, jasper, chert and quartz,
The rock is of late Palaeogene age and about 30 million years old.
Click on a picture for a larger image
Size: 23 x 17 x 0.8 centimetres
Weight: 514 grams
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