Difference between revisions of "Crater"

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[[Image:Hellas_basin.jpg|right|thumb|200px|A Mars Orbiter Laser Altimeter (MOLA) image (onboard the [[Mars Global Surveyor]] orbiter) of the massive '''Hellas Planitia''' crater caused by a large meteorite impact.]]
 
[[Image:Hellas_basin.jpg|right|thumb|200px|A Mars Orbiter Laser Altimeter (MOLA) image (onboard the [[Mars Global Surveyor]] orbiter) of the massive '''Hellas Planitia''' crater caused by a large meteorite impact.]]
 
Hyper-velocity objects impacting the [[Mars]] surface cause highly energetic impacts, ejecting rock, [[regolith|dust]] and gases into the atmosphere and surrounding landscape. Most of Mars' cratering by meteorites was caused during the [[Late Heavy Bombardment]] period of the [[Solar System]], over 3.9 billion years ago.<ref>[http://en.wikipedia.org/wiki/Hellas_Basin Hellas Basin on Wikipedia]</ref> A large meteorite impacted the Mars surface around this time, creating the obvious [[Hellas Basin]] in the southern hemisphere.
 
Hyper-velocity objects impacting the [[Mars]] surface cause highly energetic impacts, ejecting rock, [[regolith|dust]] and gases into the atmosphere and surrounding landscape. Most of Mars' cratering by meteorites was caused during the [[Late Heavy Bombardment]] period of the [[Solar System]], over 3.9 billion years ago.<ref>[http://en.wikipedia.org/wiki/Hellas_Basin Hellas Basin on Wikipedia]</ref> A large meteorite impacted the Mars surface around this time, creating the obvious [[Hellas Basin]] in the southern hemisphere.
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The [[w:Martian_dichotomy|Martian dichotomy]], between the old south and the new north has been attributed to an immense impact crater early in the life of the planet.
  
 
==Volcanic Activity==
 
==Volcanic Activity==
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===References===
 
===References===
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[[category:Geologic Processes]]
 
[[category:Geologic Processes]]

Revision as of 15:17, 9 November 2020

In it's broadest sense, a crater is simply a circular depression in the surface of a planet. Generally, in solar system geology, craters are formed either by meteorites or volcanic activity.

Meteorite Impact

A Mars Orbiter Laser Altimeter (MOLA) image (onboard the Mars Global Surveyor orbiter) of the massive Hellas Planitia crater caused by a large meteorite impact.

Hyper-velocity objects impacting the Mars surface cause highly energetic impacts, ejecting rock, dust and gases into the atmosphere and surrounding landscape. Most of Mars' cratering by meteorites was caused during the Late Heavy Bombardment period of the Solar System, over 3.9 billion years ago.[1] A large meteorite impacted the Mars surface around this time, creating the obvious Hellas Basin in the southern hemisphere.

The Martian dichotomy, between the old south and the new north has been attributed to an immense impact crater early in the life of the planet.

Volcanic Activity

Although tectonic activity on Mars is widely believed to be intermittent at best, evidence of it's volcanic past is evident in the many volcano craters littering the surface. The largest volcano caldera is the famous Olympus Mons, the largest known volcano in the Solar System.

References