What two reasons have been stated to explain the bend in the Hawaiian and Emperor seamount island chains in the Pacific Ocean briefly explain?
The mechanism causing the unique, sharp bend in the spectacular Hawaiian-Emperor seamount chain has been uncovered in a collaboration between the University of Sydney and Caltech. Rapid southward motion of the Hawaiian plume, followed by a sharp slowdown, causes the sharp bend in the Hawaiian-Emperor seamount chain.
What does the bend in the Hawaiian-Emperor chain indicate happened about 50 million years ago to the direction of Pacific Plate movement?
A sharp bend in the chain indicates that the motion of the Pacific Plate abruptly changed about 43 million years ago, as it took a more westerly turn from its earlier northerly direction.
What caused the bend in the Hawaiian Island Emperor seamount chain and when did the bend form?
A crash caused the bend By about 50 million years ago, the northern migration of subduction led to a colossal collision between the island arc at the northern end of the Pacific Plate and the northeast edge of Asia.
What does the Hawaiian island Emperor seamount chain indicate about passive movement of the Pacific Plate?
The volcanoes in the Hawaiian Island-Emperor Seamount chain get progressively older as one heads northwestward from Hawaii. These age relationships suggest that the Pacific Plate has been steadily moving northwestward, while the underlying mantle plume has remained relatively stationary.
What global tectonic event happened 40 million years ago?
40 Million Years Ago Forty million years ago, a large tectonic plate, known as the Farallon Plate, was between the Pacific and North American plates. Subduction of the Farallon Plate beneath the entire West Coast created a line of volcanoes from Alaska to Central America.
What are the 3 parts of the Hawaiian Emperor Seamount chain?
The island of Hawaiʻi is composed of five volcanoes, of which three (Kilauea, Mauna Loa, and Hualalai) are still active. Haleakalā on the island of Maui is dormant. Lōʻihi Seamount continues to grow offshore of Hawaiʻi island, and is the only known volcano in the chain in the submarine pre-shield stage.
What is the significance of the change in direction of the Hawaiian island chain and the Emperor seamount chain?
The Emperor and Hawaiian chains form an angle of about 120°. This bend was long attributed to a relatively sudden change of 60° in the direction of plate motion, but research conducted in 2003 suggests that it was the movement of the hotspot itself that caused the bend.
What are three parts of the Hawaiian Emperor Seamount chain?
What is the age and location of the Emperor seamount chain relative to the Hawaiian Islands chain?
The oldest age for the Emperor Seamounts is 81 million years, and comes from Detroit Seamount. However, Meiji Guyot, located to the north of Detroit Seamount, is likely somewhat older….Emperor seamounts table.
| Name | Colahan |
|---|---|
| Type | Seamount |
| Coordinates | 31°15′N 176°0′E |
| Age | K-Ar 38.7±0.2 million |
| Notes | — |
How did the Earth look like 50 million years ago?
Eocene Epoch This map shows how North America appeared 50 million years ago. Earth’s climate was warm relative to today. Polar ice sheets were smaller and sea level was higher. The climate in Nebraska was warm and humid, but began to cool and become more arid toward the end of the epoch Eocene.
What is forming the Hawaii Emperor seamount chain?
The Hawaiian Emperor seamount chain is a well-known example of a large seamount and island chain created by hot-spot volcanism. The Hawaiian Islands were formed by such a hot spot occurring in the middle of the Pacific Plate. While the hot spot itself is fixed, the plate is moving.