Overview: Where’s all that Lava/Plate moment over hot spotsHink of the hot spot like the directionWhat happened 42, 43 million years ago?It was moving north (plates move direction)There are lots of hot spots in the world.. but Hawaii is the most renownYellowstones it’s a hotspot. Mostly nest the ocean( continental hot spot)Snake river plane.. a long hole in the ,ap.. lava flow, hot spot ; hyper geothermal activityWhen any magma is coming up to a continental lithosphere = Lava gets sticky (boom)Why does this matter? Cant get out and hits 0 pressure so it explodesYellowstone is so big people never imagine it was a volcano about 75 kilometers prox.Iceland) mid-Atlantic ridge): coincidence of a hot spot and oceanic spreading ridgeWhat is Iceland,… basically a mega shield volcano ( a strange spot)Being split in half Eurosean plateBut it is also a hot spot above sea levelHot spots do not only occur in mid-Atlantic ridgesAlfred WegenerExtremely important. Continental driftFather of plate tectonics. Key figureGerman meteorologistInterested in glaciers . died in a Greenland expedition studying glaciersThe reason he is known as the father is because he collected all the data available that bored on this issue known as the continental drift.. 1915 synthesize all the available data, and composed in a very cohent way that continents were moving around well another, and assembled as the super continent he called it PANGEA= all landsHe was ridiculed 20 years after he proposed this people thought it was ridiculousHe proposed that the continents were once assembled and once together as PANGEA and gradually drifted = idea was continental driftKind of data he assembled (1915)= in support of continental drift1) fit of the coast lines of continents- especially Africa and south Americathis idea had been around. He assembled all the data into a cohent argumentWhy did people make fun of this?Gondwanaland  the idea wasOlder than pangeaDistribution of ancient glaciers (300 ma)By starting these glaciers in this detail you can tell what direction it is going.2) distribution of 300 Ma glaciersMakes no sense in current configurationProbable palo-S asia in3) distribution of ancient deserts and swamps4) distribution of ancient plates and animals from palcotologyex: glosopherisifn-> mammal-like reptilesthe ideas that you don't think inside the box  continents don’t move5) distribution of ancient mountain belts on opposite sides of oceans- Appalachians= caladonidese.n. America Scotland/Irelandfatal flaws of Wegener’s continental driftproposed mechanisms for moving continentscontinents don’t really fit the way Wegener reconstructed them-in plaustic he had to bend them to get the continents to fitin 1965, early computer models matched continental shelfWegener proposed a driving mechanism  how did continents move?He proposed they placed through oceanic crust like a plowQuickly disproved (+ widely ridiculed)Why did they move?Proposed they had as a result of Lunar gravitational “ day”Sir Harold Jeffries ( ancient geophysics)Quickly should that if lunar forces were that , earth would stop rotating within a few yearsHow much hotter does the earth get as you go down? 4k->For every K you go down temperature increases by 30 degreessubduction zoneslab pullthe plate tectonics “ paradigm shift” 1960sthe most convincing evidence came from the studyearth’s interior diploe magnetic field formed by dynamo in liquid outer coreGEOL 240Lg 1st Edition Lecture 11 Outline Current Lecture Overview: Where’s all that Lava/Plate moment over hot spotsHink of the hot spot like the direction What happened 42, 43 million years ago?It was moving north (plates move direction)Current LectureThere are lots of hot spots in the world.. but Hawaii is the most renownYellowstones it’s a hotspot. Mostly nest the ocean( continental hot spot)Snake river plane.. a long hole in the ,ap.. lava flow, hot spot ; hyper geothermal activity When any magma is coming up to a continental lithosphere = Lava gets sticky (boom)Why does this matter? Cant get out and hits 0 pressure so it explodes Yellowstone is so big people never imagine it was a volcano about 75 kilometers prox.Iceland) mid-Atlantic ridge): coincidence of a hot spot and oceanic spreading ridge What is Iceland,… basically a mega shield volcano ( a strange spot)Being split in half Eurosean plateBut it is also a hot spot above sea levelHot spots do not only occur in mid-Atlantic ridgesAlfred Wegener-Extremely important. Continental drift-Father of plate tectonics. Key figure-German meteorologist-Interested in glaciers . died in a Greenland expedition studying glaciers -The reason he is known as the father is because he collected all the data available that bored on this issue known as the continental drift.. 1915 synthesize all the available data, and composed in a very cohent way that continents were moving around well another, and assembled as the super continent he called it PANGEA= all lands -He was ridiculed 20 years after he proposed this people thought it was ridiculous-He proposed that the continents were once assembled and once together as PANGEA and gradually drifted = idea was continental drift -Kind of data he assembled (1915)= in support of continental drift 1) fit of the coast lines of continents - especially Africa and south Americathis idea had been around. He assembled all the data into a cohent argument Why did people make fun of this?Gondwanaland  the idea was Older than pangea Distribution of ancient glaciers (300 ma) By starting these glaciers in this detail you can tell what direction it is going. 2) distribution of 300 Ma glaciers-Makes no sense in current configuration-Probable palo-S asia in 3) distribution of ancient deserts and swamps  4) distribution of ancient plates and animals from palcotologyex: glosopherisifn-> mammal-like reptiles the ideas that you don't think inside the box  continents don’t move 5) distribution of ancient mountain belts on opposite sides of oceans- Appalachians= caladonidese.n. America Scotland/Ireland fatal flaws of Wegener’s continental driftproposed mechanisms for moving continents -continents don’t really fit the way Wegener reconstructed them--in plaustic he had to bend them to get the continents to fit -in 1965, early computer models matched