How much a parent rock (protolith) is metamorphosed is called its metamorphic grade and varies from low grade (low temperature and pressure) to high grade (high temperature and pressure). British geologist George Barrow mapped rocks in the Scottish Highlands that were metamorphosed by granitic igneous intrusions. H

How many countries have portuguese as a national language?

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.

What is the pattern of urbanisation around the word?