Owner of Jones Mineral Cabinet, Geology and Paleontology Supervisor, interested in Earth and Planetary sciences. #1. Clastic or Detrital Sedimentary Rocks The class(t)ic route begins with the weathering and erosion of sedimentary, igneous, or metamorphic rocks.
A flame retardant is a chemical substance that is added to materials during their manufacturing process in order to both reduce the likelihood of the finished product catching fire and slow down combustion. Source: GreenFacts.
noun, Chemistry. 1. any substance capable of reducing the speed of a given reaction. adjective. 2. retarding or tending to retard (usually used in combination): fire-retardant construction materials. Origin of retardant.