The map shows where to find the Argyle formation Credit: Not known, clear with picture desk Nuna is the oldest known supercontinent that came together about 1.8 billion years ago.

But Mercator's map, ... The seven continents were once assembled in a single mass, a supercontinent called Pangaea. ... Rodinia, Columbia/Nuna, Kenorland and Ur.

Look at any map of the Atlantic Ocean, ... Go back even further, about 1.4 billion years or more, and the crustal shards had arranged themselves into a supercontinent called Nuna.

But the world map hasn’t always been that way. ... “This new finding is a key step in understanding how Earth’s first supercontinent Nuna may have formed,” Zheng-Xiang Li, ...

Figure 1: Reconstructed 1.8 Ga Nuna and sketch map of the North China Craton. Grt-websterite contains the best evidence of HP metamorphism in the area; we chose the least retrogressed sample (HS12 ...

And all the land was squashed up together in the Nuna supercontinent. Even the continent we know as Australia today was, back then, a handful of smaller "continental blocks".

The next predicted supercontinent, dubbed Amasia, ... These included Pangaea, as well as Rodinia, which existed between 750 million and 1.1 billion years ago, and Nuna, ...

Researchers then determined that when Nuna broke apart an estimated 300 million years afterward, that chunk of land did not drift away. It instead became a new piece of real estate permanently ...

The map shows where to find the Argyle formation Credit: Not known, clear with picture desk Nuna is the oldest known supercontinent that came together about 1.8 billion years ago.