The growth of tertiary education, as a result of the Robbins Report in the 1960s, led the university to build numerous modern buildings across Hillhead, including several brutalist concrete blocks: the Mathematics building; the Boyd Orr Building and the Adam Smith building (housing the Faculty of Law, Business and Social Sciences, named after university graduate Adam Smith). Other additions around this time, including the new glass-lined Glasgow University Library, Rankine Building for Civil Engineering (named for Macquorn Rankine) and the amber-brick Gregory Building (housing the Geology department), were more in keeping with Gilmorehill's leafy suburban architecture. The erection of these buildings in the late 1960s, however, involved the demolition of a large number of houses in Ashton Road, and rerouting the west end of University Avenue to its current position. To cater for the expanding student population, a new refectory, known as the Hub, was opened adjacent to the library in 1966. The Glasgow University Union also had an extension completed in 1965 and the new Queen Margaret Union building opened in 1969.