Continent Introductio", Waldseemüller noted that the earth is divided into four parts, Europe, Asia, Africa and the fourth part, which he named "America" after Amerigo Vespucci's first name. On the map, the word "America" was placed on part of South America. From the 16th century the English noun "continent" was derived from the term "continent land", meaning continuous or connected land and translated from the Latin "terra continens". The noun was used to mean "a connected or continuous tract of land" or mainland. It was not applied only to very large areas of land—in the 17th century, references were made to
Ur (continent) the Bundelkhand-Aravalli block and the other Archaean blocks. 2.8–2.6 Gya metamorphism in Dharwar and Bundelkhand indicate that the stabilisation of Ur probably continued until the end of that period. Ur (continent) Ur is a proposed supercontinent that formed in the Archean (3.1 billion). In Roger's reconstruction Ur is half a billion years older than Arctica and, in the early period of its existence, it was probably the only continent on Earth, and as such can be considered a supercontinent, though it was probably smaller than present-day Australia. In more recent works geologists often refer to both Ur and other proposed