Polka dot arrangements by Gil Evans and others and notable recordings by Lester Young, Sarah Vaughn and many others. The 1943 Twentieth Century Fox Technicolor musical film The Gang's All Here, directed by Busby Berkeley, featured a large production number "The Polka-Dot Polka". The song was written by Harry Warren and Leo Robin, referencing the 19th Century Polka Dot craze in the lyric, and sang by Alice Faye with the Busby Berkeley dancers. Polka dot Polka dot is a pattern consisting of an array of large filled circles of the same size. Polka dots are most commonly seen on children's clothing, toys,
Types of volcanic eruptions Types of volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three different types of eruptions. The most well-observed are magmatic eruptions, which involve the decompression of gas within magma that