Index map
The Llano Uplift is conspicuous as a red
and tan blotch in central Texas. A structural high, it provides
a window into the underlying uplifted Precambrian rocks that formed
a margin of the ancient supercontinent of Rodinia. These 1.0-1.3
billion-year-old metamorphic rocks belong to a long, now poorly
exposed, mountain belt that once included what are parts of Scandinavia
and Antarctica today. Similar rocks also appear in New York's
Adirondack Mountains.
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