Saturday, February 16, 2013

Asteroid Impacts: 10 Biggest Known Hits

The asteroid 2012 DA14 will miss Earth on Friday, but there's a long history of hits.




An illustration of the Chicxulub impact crater in the Yucatán Peninsula.
Illustration by Detlev van Ravenswaay, Science Source

 

There is a physical connection that does not go after the Earth and the asteroid Valentine's Day, this year.


Close Friday, 2012 DA14 known asteroid would be to miss the Earth in the closest asteroid fly on the record. But the world was not always so lucky.

Crater asteroid hit the earth is sustained will. And when it is performed to erosion D 'is to determine the exact size of the meteorite difficult in some cases millions, billions of years the scientific consensus around the crater large worldwide, There is a marking of the largest asteroid impacts.

Top 10 famous here are as follows.


One. Vredefort Crater


Date of asteroid collision: 20 years an estimated 100 million

Location: Free State, South Africa

Specifications: Making the largest known impact structure, Vredefort Dome Vredefort crater is also known to have a radius of about 118 miles (190 km). This crater has been declared a UNESCO World Heritage Site in 2005.

2. Sudbury Basin


Date asteroid collision 1.8 billion years

Location: Ontario, Canada

Features: Sudbury Basin is estimated diameter of 81 miles (130 km) are considered as one of the largest impact structures on earth. Dating back 1.8 billion years, it also is one of the world's oldest known impact structure.

3. Acraman crater


Date of asteroid collision: the estimated 580 million years

Location: South Australia, Australia

Estimated diameter (90 km) 56 miles, located in what now Lake Acraman, shock structure Specifications:.

4. Woodleigh crater


Date of asteroid collision: estimation of 3.64 million years ago

Location: Western Australia, Australia

Specifications: This crater is exposed on the surface, the actual size does not give rise to many contradictions. Report on its diameter varies from (40-120 km) 25-75 miles.

5. Manicouagan Crater


Date of asteroid collision: estimation of 2.15 million years ago

Location: Quebec, Canada

Specifications: This crater formed in what is now Lake Manicouagan. And erosion, it is estimated diameter of 62 miles (100 km) is considered one of the largest and best preserved crater on the planet even.

6. Morokweng crater


Date of asteroid collision: estimation of 1.45 million years ago

Location: North-West, South Africa

Specifications: Located close to the Kalahari Desert of South Africa, the crater was included in the fossilized remains of a meteorite that created it.

7. Kara crater


Date of asteroid collision: estimation of 703 000 years ago

Location: Nenetsia, Russia

Kara crater eroded impact structures has not been published in Russia now heavily Specifications:. Kara and Ust-Kara crater: Some shock structure has been argued that in practice and are composed of two adjacent craters.

8. Chicxulub Crater


Date of asteroid collision: the estimated 65 million years

Location: State of Yucatan, Mexico

I believe contributed to the extinction of the dinosaurs meteorite is located in Mexico's Yucatan Peninsula, many scientists left the crater, or be caused Specifications:. This right pertussis estimated 186 miles (170-300 km), the actual diameter range of from 106 to prove whether you can say that it is the largest.

9. Popigai crater


Date of asteroid collisions Year: 357 000

Location: Siberia, Russia

Features: Russian scientists say that this site has become one of the world's largest diamond deposit, which contains one hundred million karats of diamond crater. Was called "Diamond Impact" These diamond

10. Chesapeake Bay crater


Date of asteroid collision: the estimated 35 million years

Location: Virginia, United States

Features: discovered in 1980, when the Chesapeake Bay crater several estimates from Washington DC 125 mile (201 km) wide crater is 53 miles (85 km).

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