Photography by Martin Chalk
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NPAACT Home > Gallery > Rocks in and around Namadgi > 008 Spotted cordierite hornfels

008 Spotted cordierite hornfels

008 Spotted cordierite hornfels - Photography by Kevin McCue

In the contact zone between the rising hot granitic rocks and the overlying cooler sedimentary rocks, minerals in the sedimentary rocks were altered by the heat and pressure. The dark 'spots' or rods in the shales are those altered minerals, named after a French geologist Cordier.

Photography by Kevin McCue

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