it's actually Portland cement
http://en.wikipedia.org/wiki/Portland_cement
Portland cement was developed from natural cements made in Britain in the early part of the nineteenth century, and its name is derived from its similarity to Portland stone, a type of building stone that was quarried on the Isle of Portland in Dorset, England.[SUP]
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and as you see A place on the other side of the Atlantic.
Concrete is as old as the Roman Empire..
we had 2 weeks of snow on the ground and a month between those 1 weeks.