Tarmac Group business was acquired by Anglo American later that year. In 2010, the group was separated into Tarmac Limited and Tarmac Building Products. Anglo American merged Tarmac Limited with the United Kingdom assets of Lafarge in 2013 to form a 50:50 joint venture, Lafarge Tarmac (now Tarmac Holdings). Tarmac Building Products was subsequently sold to Lafarge Tarmac in 2014. The company was originally formed by Edgar Purnell Hooley as the Tar Macadam (Purnell Hooley's Patent) Syndicate Limited in 1903. The distinguishing feature of the new process was that it "tarred" cheap blast furnace slag, a steelworks by-product, rather than expensive roadstone
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