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Old 5 November 2011, 11:29 AM   #20
impalass
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Join Date: Apr 2010
Real Name: Mark
Location: Toronto, Canada.
Watch: SD / LV / Daytona
Posts: 2,089
The hospital I worked in (built 1911) had terrazzo floors and marble steps worn down over years from foot steps.

When looking down a hallway lower areas could be seen like paths.
The marble steps had even more obvious wear from foot steps/shoe leather.

Over time flowing water wears down rock. Not strange at all when our sapphire crystals get marked or scratched.
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