The aggregate particles composing the top layer of fiberglass/asphalt shingles used for pitched roofing, which eventually detach and end up in the rain gutters.
When I cleaned out my rain gutters last weekend they were were full of wet leaves and shingleberries. It was a mess!
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.