EESA06H3 Lecture : Lecture 4
Document Summary
Topics for lecture 4 and for quiz 3 on thursday feb 10. Introduction to mid-ocean ridges: modern and ancient fossil mors (called ophiolites) The role of transform faults: magnetic stripes recorded in ocean floor crust and the age of ocean floors, basalt lava flows: fissure eruptions, volcanic activity under glaciers: jokulhlaups, jokulh- mountain, laup- leap, geothermal energy. Red sea: embryonic ocean, continues to widen, one day will grow up into a mature, wide ocean like the atlantic, oceans only widen to a certain wide. In iceland is where the mid-ocean ridge come up to sea level. Introduction to mid-ocean ridges: modern and ancient fossil mors (called ophiolites: oceans closed and they push up on land- ancient pieces of ocean crust- ophiolites. Figure 2. 8: mid-ocean ridge, are literally underwater volcano, active all the time, the mid-ocean ridge is not strictly continuous, there are cracks running along ridges, called. If we add new volcanic material, pushing apart something.
