After 1900 BCE, the systematic use of the symbols ended, after the final stage of the Mature Harappan civilization. A few Harappan signs have been claimed to appear until as late as around 1100 BCE, the beginning of the Iron Age in India. Onshore explorations near Bet Dwarka in Gujarat revealed the presence of late Indus seals depicting a three-headed animal, an earthen vessel inscribed in what is claimed to be a late Harappan script and a large quantity of pottery.