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Answer #7 please

Answer #7 please

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Answer #7 please 

of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) How far apart are points B and C today in kilometers? 5) Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) Convert your answer above from kilometers per million years to millimeters per year: 7) A 20 year old college student wants to know how far Africa and North America have moved apart during their lifetime. Based on your answers above, make the calculation for how far have Africa and North America moved apart during the last 20 years: (or feel free to do the calculation for your actual age) 1
Transcribed Image Text:of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) How far apart are points B and C today in kilometers? 5) Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) Convert your answer above from kilometers per million years to millimeters per year: 7) A 20 year old college student wants to know how far Africa and North America have moved apart during their lifetime. Based on your answers above, make the calculation for how far have Africa and North America moved apart during the last 20 years: (or feel free to do the calculation for your actual age) 1
Part 3: Age of the Seafloor The map below shows the ages of seafloor basalt (the age of the igneous rock that actually makes up the crust – which is below the seafloor sediment that has accumulated on top of it over time) between North America and Africa. 0- Holocene & Pliocene -5.3 Spain Miocene, Oligocene, Eocene, & Paleocene North America -65- •B Late Cretaceous -100 Lower Cretaceous 145 Africa Jurassic Kilometers 2000 South America 500 1000 1500 1) Draw a red line on the map to show the exact location of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) How far apart are points B and C today in kilometers? 5) Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) Convert your answer above from kilometers per million years to millimeters per year: Seafloor Ages in Millions of Years Ago (Ma)
Transcribed Image Text:Part 3: Age of the Seafloor The map below shows the ages of seafloor basalt (the age of the igneous rock that actually makes up the crust – which is below the seafloor sediment that has accumulated on top of it over time) between North America and Africa. 0- Holocene & Pliocene -5.3 Spain Miocene, Oligocene, Eocene, & Paleocene North America -65- •B Late Cretaceous -100 Lower Cretaceous 145 Africa Jurassic Kilometers 2000 South America 500 1000 1500 1) Draw a red line on the map to show the exact location of the divergent plate boundary between the North American Plate and the African and Eurasian Plates. Refer to lecture slides if you need a reminder on which plate is which. 2) Draw two blue lines on the map to show the location of two transform fault plate boundaries. 3) Notice that points B and C were together 145 million years ago, but did the sea floor spread apart at exactly the same rate on both sides of the mid-ocean ridge? How can you tell? 4) How far apart are points B and C today in kilometers? 5) Calculate the average rate in kilometers per million years that points B and C have moved apart over the past 145 million years (be sure to show your work!) 6) Convert your answer above from kilometers per million years to millimeters per year: Seafloor Ages in Millions of Years Ago (Ma)
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