MULBERRY LEAF A MILLION YEARS OLD 

 About a million years ago lUc. now nonexistent Lake Florissant occupied a position in the Rocky Mountains 

 not far from Pike's Peak. Adjacent volcanoes showered into it clouds of fine volcanic ash, carrying down and 

 covering up in layers innumerable plants and insects, which were later sealed up by lava deposits. The shale 

 thus formed splits readily, revealing the flattened fossils of the ancient fauna and flora, thus providing an insight 

 into past conditions. The mulberry leaf (Morus symmetrica) shown above belongs to a type still existing in our 

 southwestern states, but now not found among the living flora of Colorado 

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