When people first occupied this part of western Australia some 30,000 years ago, they were the tops of volcanic mountains 60 miles ... designs into the black rocks here, but archaeologists ...

While magma bodies may have risen and solidified, rigid plates could not collide or subduct to form the volcanic mountain chains ... the scarcity of ancient rocks. But Australia's Pilbara Craton ...

Magma, the super-hot molten rock which feeds volcanic eruptions ... whether in Hawai'i or Iceland, or the Glass House Mountains or Mount Gambier in Australia, look for colored specks in the ...