The 366 daily episodes in 2014 were chronological snapshots of earth history, beginning with the Precambrian in January and on to the Cenozoic in December. You can find them all in the index in the right sidebar. In 2015, the daily episodes for each month were assembled into monthly packages, and a few new episodes were posted. Now, the blog/podcast is on a weekly schedule with diverse topics, and the Facebook Page showcases photos on Mineral Monday and Fossil Friday. Thanks for your interest!

Friday, January 17, 2014

January 17. Australian and Antarctic Cratons

By Richard I. Gibson

Much of Western Australia is underlain by Archean or early Proterozoic rocks in two major cratons, the Yilgarn and Pilbara Blocks. It’s likely that these blocks extend in the subsurface into central Australia, but most of Eastern Australia is much younger in terms of the age of formation of the basement rocks there.

Original map by Rolinator, via Wikipedia under GNU free documentation license.

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