It consists of limestone, with a superstratum of pliocenic and volcanic masses, and was once an island; its highest point is 811 meters (2661 feet) above sea-level.
A substratum or substrate is a language which has lower power or prestige than another, while a superstratum or superstrate is the language that has higher power or prestige.
Language contact can occur at language borders, between adstratum languages, or as the result of migration, with an intrusive language acting as either a superstratum or a substratum.
By reinforcing a connection to the familiar world of touch, the frames also scuttle the notion that abstraction belongs to a rarefied superstratum of experience.
