The mechanism causing lithospheric plates to move is thought to be a combination of convection in the mantle and slab pull caused by subducting lithosphere identify all of the different observations used to support harry hess theory of seafloor spreading seafloor magnetic anomalies.
The theory of sea floor spreading supports what idea.
What evidence supports hess s theory of seafloor spreading.
Evidence from molten material.
When oceanic plates diverge tensional stress causes fractures to occur in the lithosphere.
Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
The pattern of magnetic strips shows that the seafloor is expanding at mid ocean ridges.
The mid ocean ridge is where the seafloor spreading occurs in which tectonic plates large slabs of earth s lithosphere split apart from each other.
Evidence for sea floor spreading.
This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century.
Morgan later outlined the theory in 1968.
Hess proposed the idea that are places where.
Seafloor spreading the idea of continental drift circulated in scientific circles until world war ii when sounding gear produced new evidence of what the seafloor looked like.
Several types of evidence supported hess s theory of sea floor spreading.
According to the theory of plate tectonics the earth s lithosphere is broken into distinct plates which are floating on a ductile layer called asthenosphere upper part of the mantle.
Wegener proposed that the continents themselves move which is untrue.
The gear developed in the 1930s bounced sound waves off the seafloor to determine its depth and features.
Sea floor spreading is the phenomena of new sea floor being created through mid ocean ridges.
Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid oceanic ridge.
It was from the continental drift theory convection current theory and the theory of seafloor spreading the theory of plate tectonics was formulated.
First proposed in the early 1960s by the american geologist harry h.
Seafloor spreading theory that oceanic crust forms along submarine mountain zones known collectively as the mid ocean ridge system and spreads out laterally away from them.
In 1967 mckenzie and parker suggested the theory of plate tectonics.
The theory of seafloor spreading.
Sea floor spreading caused the break up of pangea which prompted wegener to add this in support of his continental drift theory.
Hess its major tenets gave great support to the theory of continental drift continental drift geological theory that the relative positions of the continents on the earth s surface have.
The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones rather than magma pressure although there is typically significant magma activity at spreading ridges.
Check all that apply.
Seafloor spreading theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges.
Which statement accurately describes how magnetic stripes in ocean rock provide evidence of seafloor spreading.
