Part A Continental rift zones Divergent boundaries can crea create continental rift zones. The continent will break apart as a consequence of this rifting, with each new landmass being separated by a newly formed seafloor As shown in the figure below, continental rifting is caused by the tensional forces generated by diverging plates. The tensional forces cause continental crust to stretch and thin out, which, in turn, creates upwarping of the crust. Stretching and upwarping of the crust generate numerous normal faults and seismic activity within the rift zone. Thinning of the crust allows magma to upwell, which generates significant volcanic activity within the rift zone. With time, the tensional forces cause the continental crust to spread out laterally from the rift, and the upwelling magma will generate numerous basaltic lavas that harden to form a new seafloor, which will be filled with ocean water. Eventually, the continental landmasses will be separated from each other by extensive oceanic crust. Label the diagram below, which shows the last stage of continental rifting. Drag the appropriate labels to the appropriate box. Labels may be used only once. ▸ View Available Hint(s) upwelling rift valley oceanic crust continental crust mid-ocean ridge Reset Help
Part A Continental rift zones Divergent boundaries can crea create continental rift zones. The continent will break apart as a consequence of this rifting, with each new landmass being separated by a newly formed seafloor As shown in the figure below, continental rifting is caused by the tensional forces generated by diverging plates. The tensional forces cause continental crust to stretch and thin out, which, in turn, creates upwarping of the crust. Stretching and upwarping of the crust generate numerous normal faults and seismic activity within the rift zone. Thinning of the crust allows magma to upwell, which generates significant volcanic activity within the rift zone. With time, the tensional forces cause the continental crust to spread out laterally from the rift, and the upwelling magma will generate numerous basaltic lavas that harden to form a new seafloor, which will be filled with ocean water. Eventually, the continental landmasses will be separated from each other by extensive oceanic crust. Label the diagram below, which shows the last stage of continental rifting. Drag the appropriate labels to the appropriate box. Labels may be used only once. ▸ View Available Hint(s) upwelling rift valley oceanic crust continental crust mid-ocean ridge Reset Help
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
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Transcribed Image Text:Part A - Continental rift zones
Divergent boundaries can create continental rift zones. The continent will break apart as a consequence of this rifting, with each new landmass being separated by a newly formed seafloor:
As shown in the figure below, continental rifting is caused by the tensional forces generated by diverging plates. The tensional forces cause continental crust to stretch and thin out, which, in turn, creates upwarping of the crust. Stretching and upwarping of the crust generate numerous normal faults and seismic
activity within the rift zone. Thinning of the crust allows magma to upwell, which generates significant volcanic activity within the rift zone. With time, the tensional forces cause the continental crust to spread out laterally from the rift, and the upwelling magma will generate numerous basaltic lavas that harden to
form a new seafloor, which will be filled with ocean water. Eventually, the continental landmasses will be separated from each other by extensive oceanic crust.
Label the diagram below, which shows the last stage of continental rifting.
Drag the appropriate labels to the appropriate box. Labels may be used only once.
► View Available Hint(s)
upwelling
rift valley
oceanic crust
continental crust
mid-ocean ridge
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