RMK22E9K–Uppercase letters that represented numbers in ancient Rome; they are still seen today in uses such as clock and watch dials and pagination.
RMK22CXF–Hot spots in the ocean create characteristic lines of volcanic islands. When magma rises to the surface, it breaks through the oceanic plate and produces a volcano. The plate moves, but the hot spot stays still. Therefore, it stops feeding the first volcanic structure and creates a new volcano. The extinguished volcano slowly erodes and coral reefs grow on its slopes, forming an atoll—a ring- shaped island around a shallow stretch of water called a lagoon. The eroded volcano, which has sunk below the surface, is called a guyot.
RMK22CE3–Relief features go through a series stages. Fluvial landscapes are altered by erosive action watercourses. Where landscape still very rugged,with high peaks steep slopes,erosion very rapid. Watercourses carve out deep V-shaped valleys carry away much rocky debris. Due to erosion,topography begins to level out: summits are rounded,slopes become gentler,watercourses carry less debris decrease in speed.
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