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.
An economic sector is a certain type of business activity within an economy. Economics is part of the social structure of a society and is concerned with how people produce and consume goods and services. What types of goods and services are produced and consumed in a society depends on geography and social customs, among other factors.