GEOL 1304 Lecture Notes - Lecture 7: Hydrothermal Vent, Geomagnetic Reversal, Archean
Document Summary
Uses energy in hydrogen sul de to garden truck dinero . Are found all along the mid-oceanic ridges these release are nicknamed "black smokers" for the dark cloud of sul de minerals issuing from them, which create metal-rich clay on the sea oor. Paleomagnetism used to escort sea oor, magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidi ed. layers alternating from normal to reversed. is the atlantic growth yes. 14carbon unstable isotope that will decline through time half the 5730 years. Sea ooring spreading where mantl rises up to surface to form new sea oor. youngest rock at peak. What could happen to these island if they keep divergin? a big trench , two islands will be made. Geomagnetic reversals earth"s magnetic eld periodically blow polarity - the north pole becomes the south pole, and vice versa. the mineral grains switch and are recorded in rock.
