Innsbruck's Cathedral of St. Jakob
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2010-11-09 10:20:19
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 The image below shows a cut and polished piece of the Höttinger breccia from an outcrop (probably an old quarry wall) on the Wilhelm Greil Weg above Hötting. The gray pieces are all limestone in a reddish-brown fine matrix. Note the piece at lower left with the criss-crossing light gray veins. It was deposited as a sediment about 200 million years ago in the Triassic or Early Jurassic, fractured in the stress and strain of the building of the Calcareous Alps about 40 million years ago, exposed and eroded off the Alps and engulfed in a mudslide a few tens of thousands of years ago, and exposed again by quarriers a few hundred years ago as they took out stone for old buildings like the Jakobsdom. 
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