Tarmac Group Tarmac Group Tarmac Group Limited was a multinational building materials company headquartered in Wolverhampton, United Kingdom. It produced road surfacing and heavy building materials including aggregates, concrete, cement and lime, as well as operating as a road construction and maintenance subcontractor. The company was founded in 1903 by Edgar Purnell Hooley after he patented the road surfacing material tarmac in 1901. The company was formerly listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index. In July 1999, Tarmac demerged its construction and professional services businesses under the name Carillion; the Tarmac building materials
Cetacean surfacing behaviour Cetacean surfacing behaviour Cetacean surfacing behaviour or breaching is a group of behaviours demonstrated by the Cetacea infraorder when they come to the water's surface to breathe. Time intervals between surfacing can vary depending on the species, surfacing style or the purpose of the dive, and some species have been known to dive for up to 85 minutes at a time when hunting. In addition to respiration, cetaceans have developed and used surface behaviours for many other functions such as display, feeding and communication. All regularly observed members of the order Cetacea, including whales, dolphins and porpoises, show a range