EESA06H3 Lecture Notes - Lecture 5: North Atlantic Igneous Province, Iceland Plume, Passive Margin
Document Summary
Week 5: lecture #5: monday february 02, 2015. Uniformitarianism: we look the present condition around the planet, to interpret the. Processes of the past, that we have no experience of today: reversal of the earth"s magnetic field. Lithosphere, another word for plate fig 2. 19. Distinguish bwt sea and ocean, ocean have spreading centre, sea don"t. Broken faulted margin of delusional centre here, and that"s what called a passive margin. Passive margin on the edge of plate. By thinning and rifting e. g. breakup of pangea fig 9. 38 (not diagram) This is not the plate boundary/ margin. Simplified structure of a passive margin: deposition of thick marine sediments (^) These are important because in the sediments are oil and gas. Oil and gas resources along passive plate margins worldwide. In order to break up the supercontinent have to strength the lithosphere. Lots of ice caps & glacial landscape. Record of past activity by the iceland plume.
