June 29, 2015

Monday Geology Picture: The Three Sisters, Blue Mountains, Australia

Posted by Evelyn Mervine

The Three Sisters, viewed in April 2015.

The Three Sisters, viewed in April 2015.

This week’s Monday Geology Picture was taken during my recent vacation in Australia. One day my husband and I drove outside of Sydney to spend some time exploring the Blue Mountains. One of the tourist attractions that we visited is a lovely rock formation known as The Three Sisters. This rock formation was carved (by erosion) out of ~250 million year old sandstone.