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Fenambosy Chevron
 
 
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The Fenambosy Chevron is one of four chevron-shaped land features
Chevron (land form)

A chevron is a wedge-shaped sediment deposit_ observed on coastlines around the world. These formations sometimes include tiny fossils from the ocean....
 on the southwest coast of Madagascar
Madagascar

Madagascar, or Republic of Madagascar , is an island nation in the Indian Ocean off the southeastern coast of Africa. The main island, also called Madagascar, is the List of islands by area, and is home to 5% of the world's plant and animal species, of which more than 80% are Endemism to Madagascar....
, near the tip of Madagascar, 600 feet (180 m) high and three miles (5 km) from the ocean. It is composed mainly of material found on the ocean
Ocean

An ocean is a major body of Seawater, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface is covered by ocean, a World Ocean that is customarily divided into several principal oceans and smaller seas....
 floor at . . Chevrons such as Fenambosy have been hypothesized as providing evidence of "megatsunami
Megatsunami

Megatsunami is an informal term to indicate a tsunami that has initial wave heights that are much larger than normal tsunami. Unlike usual tsunamis, which originate from tectonic plate and the raising or lowering of the sea floor, known megatsunamis have originated from large scale impact events such as landslides and meteor impacts....
s" caused by comet
Comet

A comet is a Small Solar System body that orbits the Sun and, when close enough to the Sun, exhibits a visible coma or a tail?both primarily from the effects of solar radiation upon the Comet nucleus....
s or asteroid
Asteroid

Asteroids, sometimes called minor planets or planetoids, are small Solar System bodies in orbit around the Sun, smaller than planets but larger than meteoroids....
s crashing into Earth
Earth

Earth is the third planet from the Sun. Earth is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the World and Wiktionary:Terra.Note that by International Astronomical Union convention, the term "Terra" is used for naming extensive land masses, rather...
. "About 900 miles southeast from the Madagascar chevrons, in deep ocean, is Burckle crater
Burckle Crater

Burckle Crater is an undersea crater likely to have been formed by a very large scale and relatively recent comet or meteorite impact event. It is estimated to be about 30 km in diameter , hence about 25 times larger than the 1.2 km Meteor Crater ....
, which Dr. Abbott discovered last year.






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The Fenambosy Chevron is one of four chevron-shaped land features
Chevron (land form)

A chevron is a wedge-shaped sediment deposit_ observed on coastlines around the world. These formations sometimes include tiny fossils from the ocean....
 on the southwest coast of Madagascar
Madagascar

Madagascar, or Republic of Madagascar , is an island nation in the Indian Ocean off the southeastern coast of Africa. The main island, also called Madagascar, is the List of islands by area, and is home to 5% of the world's plant and animal species, of which more than 80% are Endemism to Madagascar....
, near the tip of Madagascar, 600 feet (180 m) high and three miles (5 km) from the ocean. It is composed mainly of material found on the ocean
Ocean

An ocean is a major body of Seawater, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface is covered by ocean, a World Ocean that is customarily divided into several principal oceans and smaller seas....
 floor at . . Chevrons such as Fenambosy have been hypothesized as providing evidence of "megatsunami
Megatsunami

Megatsunami is an informal term to indicate a tsunami that has initial wave heights that are much larger than normal tsunami. Unlike usual tsunamis, which originate from tectonic plate and the raising or lowering of the sea floor, known megatsunamis have originated from large scale impact events such as landslides and meteor impacts....
s" caused by comet
Comet

A comet is a Small Solar System body that orbits the Sun and, when close enough to the Sun, exhibits a visible coma or a tail?both primarily from the effects of solar radiation upon the Comet nucleus....
s or asteroid
Asteroid

Asteroids, sometimes called minor planets or planetoids, are small Solar System bodies in orbit around the Sun, smaller than planets but larger than meteoroids....
s crashing into Earth
Earth

Earth is the third planet from the Sun. Earth is the largest of the terrestrial planets in the Solar System in diameter, mass and density. It is also referred to as the World and Wiktionary:Terra.Note that by International Astronomical Union convention, the term "Terra" is used for naming extensive land masses, rather...
. "About 900 miles southeast from the Madagascar chevrons, in deep ocean, is Burckle crater
Burckle Crater

Burckle Crater is an undersea crater likely to have been formed by a very large scale and relatively recent comet or meteorite impact event. It is estimated to be about 30 km in diameter , hence about 25 times larger than the 1.2 km Meteor Crater ....
, which Dr. Abbott discovered last year. Although its sediment
Sediment

Sediment is any particulate matter that can be sediment transport by fluid dynamics, and which eventually is deposited.Sediments are most often transported by water transported by wind and glaciers....
s have not been directly sampled, cores from the area contain high levels of nickel
Nickel

Nickel is a chemical element, with the chemical symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge....
 and magnetic components associated with impact ejecta. Burckle crater has not been dated, but Dr. Abbott estimates that it is 4,500 to 5,000 years old."

Sources and notes