EESA06H3 Lecture Notes - Lecture 2: Echo Sounding, Derrick, Gabbro
Document Summary
The plate tectonics theory suggests that the surface of the earth is divided into several large plates that change in position and size. Moving sea floor sea floor spreading. Tectonics is the study of the origin and arrangement of the broad structural features of the earth"s. Intense geologic activity occurs at plate boundaries where plates move away from one another, past. Pangea initially separated into two parts: laurasia (excluding india, gondwanaland. The northern supercontinent, containing what is now north america and eurasia. The southern supercontinent, composed of all the present-day southern-hemisphere continents and india (which has drifted north) These continents all have deposits of late palaeozoic age. The study of ancient climates is called paleoclimatology. Polar wandering wegener used this term to describe the fact that ancient poles were in different positions than present poles. Oceans cover more than 70 percent of the earth"s surface. Offshore oil platforms drill holes in the relatively shallow sea floor near shore.