Abstract: Alkaline basaltic volcanism took place in three different phases during Quaternary in WesternAnatolia around Kula (Manisa). These volcanics were possibly derived from a hot spot over the mantle risingthrough a plume where graben type tectonics were active. «Base surge» bed forms have been observed around somemaar volcanoes of Kula. Base surge density flows produced by shallow, explosive steam eruptions are turbulent mixtures of steam and solid ejecta. Depositing currents originate within the craters and sweep outward at high velocities. Definition of «base surge» bed forms is given through brief descriptions of morphologic, geologic and petrologic features of Kula volcanics.