EESA06H3 Chapter 1: Chapter 1
Document Summary
1793, while conducting surveys for excavation of canal in bath, smith noted that regular succession of rock layers he encountered: as he toured other areas of england to investigate similar canals being dug, smith compared. What do geoscientists do: prospectors now called exploration geologists. In canada, much of landscape made of landforms and sediments left behind when ice sheets covered northern part of north american: studied by glacial geologists, hydrogeologists: study sediments that contain and transmit water. Internal structure of earth: layers form innermost core, composed of iron alloy, mantle- composed of fe-mg silicates (form peridotite). Internal energy source- geothermal heat, remaining from planet"s formation and generated by radioactive decay of minerals within earth: drives plate movements, volcanic eruptions, earthquakes. Interactions between externally and internally driven forces responsible for many dynamic processes operating on planet and continued cycling of materials and chemicals within earth system.
