2/16/2013

Impact craters on Earth



This is the Earth, at a time when dinosaurs roamed a lush & fertile planet.
But the piece of rock just six miles wide changed all that.
It hit with the force of ten thousand nuclear weapons.
A trillion tons of dirt & rock hurtled into the atmosphere creating a suffocating blanket of dust the Sun was powerless to penetrate for a thousand years.
It happened before, it will happen again, it's just a question of when.



Confirmed impact craters listed by size
Only the largest craters (20 km or more diameter) are listed below; the rest are listed by geographical region on subsidiary lists. These features were caused by the collision of large meteorites or comets with the Earth. For eroded or buried craters the stated diameter typically refers to an estimate of original rimdiameter and may not correspond to present surface features.
Name
Location
Diameter (km)
Age (million years)
Coordinates
Free State, South Africa
300
2023
Ontario, Canada
250
1849
Yucatán, Mexico
180
65
Western Australia, Australia
60-160
364
Nenetsia, Russia
120
70.3
Quebec, Canada
100
215
Siberia, Russia
100
35.7
South Australia, Australia
85-90
580
Virginia, United States
85
35.5
80
167
Kalahari Desert, South Africa
70
145
Western Australia, Australia
30-70
2650
Lake Tai, China
68.5
360-375?
Queensland, Australia
55-66
112-133
Idaho and Montana, United States
60
600
Quebec, Canada
54
342
Dalarna, Sweden
52
377
Pamir Mountains, Tajikistan
52
25
Nova Scotia, Canada
45
50.5
Central Brazil
40
244.4
Manitoba, Canada
40
220
Barents Sea, Norway
40
142
Alberta, Canada
24-40
91
Saskatchewan, Canada
39
115
Quebec, Canada
36
290
Iowa, United States
35
74
35
200
Ontario, Canada
32
450
Western Finland, Finland
10-30
1400-1500
Western Australia, Australia
30
1630?
28
36.4
Quebec, Canada
26
290
25
49
Northern Territory, Australia
25
646
24
65.17
Bavaria, Germany
24
14.3-14.5
Quebec, Canada
24
less than 500
Nunavut, Canada
23
39
23
73.3
Northern Territory, Australia
22
142.5
21
201
Northern Territory, Australia
20
600-1660
Siberia, Russia
20
40
Poltava Oblast, Ukraine
20
169



Large unconfirmed craters

Name
Location
Diameter (km)
Age (million years)
Coordinates
Northern Territory, Australia
600
545

500
65

480-500
less than 500, possibly 250

250
250

offshore of Scotland, United Kingdom
150
1177

100
3000
80x40
30-40

50
unknown

35-40
30-40

31
unknown

30
0.003

20
0.0005

offshore of New Jersey, United States
20
35


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