As I am short on words. Here is something I culled from the wikipedia on PEI's famous coastline.
"The shoreline of the island consists of a combination of long beaches, dunes, short sandstone cliffs, salt water marshes and numerous small bays and harbours. The beaches, dunes and sandstone cliffs consist of distinctive reddish sand, due to the high amount of iron oxide in the rock. The white sand at Basin Head is unique on the island. The unusual shape of the grains cause a humming noise as they rub against each other when walked on. The magnificent sand dunes at Greenwich are of particular significance."
I love the red sandstone on the Island and would love to use it as a part of any house I would have there. Unfortunately I believe it's use may be illegal.
"Sandstone is an arenaceous sedimentary rock composed mainly of feldspar and quartz and varies in colour (in a similar way to sand), through grey, yellow, red, and white.
Rock formations that are primarily sandstone usually allow percolation of water, and are porous enough to store large quantities, making them valuable aquifers. Fine grained aquifers, such as sandstones, are more apt to filter out pollutants from the surface than are rocks with cracks and crevices such as limestones or other rocks fractured from seismic activity."
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