EESA06H3 Study Guide - Final Guide: Half-Life, Orbital Forcing, Evaporite
30 Jul 2013
School
Department
Course
Professor
Document Summary
At mor, there are only shallow earthquakes, at trenches, there are deep earthquakes. Found by: measuring the accumulation of the oceans salt content over time, measuring the time it took molten to cool to the present temperature of the earth. Radioactive dating of the earth: daughter products form from parents at characteristic rates of decay (half-lives, ratio of daughter products to remaining parent material tells how much time has elapsed, present estimate: 4. 56 billion years old. Layer 3 less than 135 000 years old: are not rocks they are sediments, famous in ontario, glacial and interglacial (current) sediments. Layer 4 in to, hundreds of years old. It consists of what we are doing to the planet, building roads gas stations etc: mining processes: Underground mine: deeper, blasted loose then carried by elevators and trucks. Mill: place where ore is separated from the other rocks by crushing.
