S.K.  Osasan, 
    Economic Assessment of Granite Quarrying in Oyo State, Nigeria,
    Journal of Engineering and Applied Sciences,
    Volume 4,Issue 2,
    2009,
    Pages 135-140,
    ISSN 1816-949x,
    jeasci.2009.135.140,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2009.135.140)
    Abstract: For centuries, the mining industry has been contributing to 
  the development of nations, a vibrant mining sector like any other sector provides 
  good platform for a country’s growth. Quarrying, a branch of mining is 
  one of the bedrock of the construction sector in any economy. This study examines 
  the economic contribution of granite quarrying in Oyo State, South-Western Nigeria. 
  Fourteen granite quarrying companies exist in the state, out of which twelve 
  are operational. The twelve quarries were visited in the course of this study 
  and relevant data were gathered from them. All the companies share a total of 
  220.7x10<SUP>6</SUP> tons of proven granite reserve. Estimated revenue generated 
  by the federal government is <img src="http://medwelljournals.com/fulltext/jeasci/2009/images/image-2k9-135-140.gif" width="14" height="13" align="absmiddle">500,000 
  day<SUP>-1</SUP>. A total of 845 people are directly employed by the quarries, 
  while 1018 people are employed indirectly in the company&#146;s community. The 
  study also revealed a substantial increase in the level of income of the indirect 
  employees after relocating to their businesses to the company&#146;s community. 
  It was equally discovered that 80% of the granite produced in the state is sold 
  and used in Lagos state (a neighbouring state). Granite quarrying in Oyo state 
  is very profitable and rewarding for investors but government should improve 
  power supply to encourage investors and reduce the cost of operating the quarries.
    Keywords: Granite;quarrying;economic assessment;direct employees;indirect employees