GEOL 1040 1st Edition Lecture 4Outline of Last Lecture IV. Earth is a dynamic systema) Plate tectonicsV. Some branches of geologya) Mineralogyb) Petrologyc) Geochronologyd) SeismologyOutline of Current Lecture VI. How geology influences where and how we livea) Volcanoesb) Landslidesc) Riversd) Earth QuakesVII. Distribution of Natural Resourcesa) Copperb) IronVIII. Parts of the Eartha) Crustb) Mantlec) CoreCurrent Lecture: Chapter 1VI. How geology influences where and how we livea) Volcanoesa) Molten lava, hot volcanic ash, and gases make it impossible to live near active volcanoes.b) Landslidesa) Steep hillslopes made of very weak materials can trigger a catastrophic land slide, destroying everything in its pathc) Riversa) Provide transportation, water, fertile soil, and energy… making people want to live near themb) Too close in low areas can also result in flooding, making areas undesirableThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.d) Earth Quakesa) Areas around faults can be ruined by earth quakes if constructed poorlyVII. Distribution of Natural Resourcesa) Coppera) Mainly in the mountainous western region of NorthAmericab) Made when magma invaded the west cost between 160and 35 million years agob) Irona) In Canada, and Great Lake region (aka the CanadianShield)b) Rocks are older than one billion years old here, and theiron rich rocks formed in Earth’s history when oxygenbecame more abundant in the atmosphere(1) The rising of oxygen levels caused the iron dissolved in the seas to precipitate into layersVIII. Parts of the Eartha) Crusta) Oceanic(1) made up of Basalt(2) Much heavier and denser(3) Average 7 km thickb) Continental(1) Made up of Granite(2) Average thickness 35-40 kmb) Mantlea) Upper(1) Made up of olivine (green color)b) Lower(1) Like upper mantle but has pressurized minerals(2) Can flow because it is a weak solidc) About 2,900 km thickc) Corea) Outer core(1) Moltenb) Inner Core(1) Solid(2) Made up of Iron and
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