EESA06H3 Lecture Notes - Lecture 5: Southeast Indian Ridge, East Pacific Rise, Seafloor Spreading
Document Summary
How mid-ocean ridges drive the movement of plates (fuel of plate tectonics) Where and how to study mid-ocean ridges and sea floor spreading: direct observation. Iceland where the mid-atlantic ridge is exposed on land. Tephra volcano ash (its actually wrong nothing"s actually burning) Interested in mid-ocean ridges (mors) because they drive plate tectonics. Know the east pacific rise and southeast indian ridge. Deep trenches (subduction zones) where plate gets subducted down. This ridge is more productive because it"s being affected by subduction zone gets pulled apart. Decompression melting mantle plumes, magma starts to rise makes dikes. There"s a circulation system where cold water is heated, and it rises back to the surface. Smoke plumes (smokers = active hydrothermal vents) have lot of minerals (metals). They have different colour type (based on different minerals provided). There are many organisms living in these areas (they are able to detect heat). Bacteria can live in this area (they can tolerate these environments).
