How do land structures of Iceland help confirm seafloor spreading?
The land structures of Iceland that help confirm seafloor spreading are the volcanoes located throughout Iceland.
What evidence have geologists found for sea floor spreading?
Evidence of Sea Floor Spreading. Harry Hess’s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory. This evidence was from the investigations of the molten material, seafloor drilling, radiometric age dating and fossil ages, and the magnetic stripes.
Why was sea floor spreading such an important discovery leading to the theory of plate tectonics?
Seafloor spreading disproves an early part of the theory of continental drift. Supporters of continental drift originally theorized that the continents moved (drifted) through unmoving oceans. Seafloor spreading proves that the ocean itself is a site of tectonic activity.
Why does a map of worldwide earthquakes closely match the locations of worldwide plate boundaries?
Why does a map of worldwide earthquakes closely match the locations of worldwide plate boundaries? Plate boundaries are locations where plates interact. Earthquakes frequently occur in areas where convergent or transform plate movements occur.
What evidence supports Hess’s theory of sea-floor spreading?
Several types of evidence supported Hess’s theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
What key pieces of evidence were found to prove the sea-floor is spreading?
Several types of evidence from the oceans supported Hess’s theory of sea-floor spreading-evidence from molten material, magnetic stripes, and drilling samples. This evidence also led sci- entists to look again at Wegener’s theory of continental drift.
What is the major evidence that sea-floor spreading creates new lithosphere explain your answer?
The record of magnetic reversals is carried away from each side of the spreading center of a mid-ocean ridge, showing that the molten rock is creating new lithosphere.
Why did distribution of earthquakes and volcanoes help confirm plate tectonic theory?
Why did the distribution of earthquakes and volcanoes help confirm plate tectonic theory? Both earthquakes and volcanoes were distributed randomly. Earthquakes and volcanoes were different along different types of boundaries. Earthquakes and volcanoes were the same along all of the plate boundaries.
What does plate tectonic theory predict about the distribution of earthquakes and volcanoes?
What does plate tectonic theory predict about the distribution of volcanoes and earthquakes? They should be evenly distributed throughout the earth. They should occur primarily along plate boundaries.
What was the name of the ocean that surrounded Pangea?
Panthalassa
Pangea was surrounded by a global ocean called Panthalassa, and it was fully assembled by the Early Permian Epoch (some 299 million to about 273 million years ago).
Why is it unlikely that the entire world was covered by ice 300 million years ago?
Earth’s geologic history. Regarding glacial ages, why is it unlikely that the entire world was covered by ice 300 million years ago? The only places in the world that have ever had thick continental ice sheets are in the polar regions such as Greenland and Antarctica.