[thackney]

Since you said that, I had to go look if the Portland stone was related to portland cement.

The name Portland cement was given by Joseph Aspdin in 1824 due to its similarity in colour and its quality when it hardens like Portland stone.Portland stone is white grey limestone in island of Portland, Dorset.

http://www.aboutcivil.org/ordinary-portland-cement.html

The Island of Portland is where this group of sedimentary rock is accessible from the surface.

[Red Badger]

The City of Portland is where this group of rocks is accessible from the voting booth!...............