There are two basic types of metamorphic rocks. Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.
Image by Picture Taking Fool. Industrial Economics is the study of firms, industries, and markets. It looks at firms of all sizes â from local corner shops to multinational giants such as WalMart or Tesco. And it considers a whole range of industries, such as electricity generation, car production, and restaurants.
In society every social being has some economic needs and these needs are evaluated by economics .Economics is science of wealth, which is possible in context of society. Marshall says economics is study of economic activities which are related to human welfare. The following points are showing their relationship .