Which I'm sure is related to Margaret. All these variations basically mean pearl in Greek. 'Peggy' was a vernacular term for a naval dockyard mess attendant and messenger who waited on the workers. I can't speak for the Royal Navy but for some reason it became translated to merchant ships.
SCCâs Cement Stabilized Sand is a clean and durable material made from a mixture of sand, cement and water that is used for backfill and bedding on a wide variety of civil projects. CSS is predominately used as backfill for retaining walls and storm sewer drainage.
Biogenic sand samples (also called organic or biological sands) are composed of pieces the skeletal remains of plants and animals. They are also sometimes called calcium sands because the chemical composition of most skeletal remains is calcium carbonate (CaCO3), the material our bones are made of.