Mars Anomalies

[rohnds]

Lets start with this famous one.


Rohn

[rohnds]

Rohn

[fitzbew88]

All I see are just normal craters with eroded central uplifts.

The Moon has a million of them, although they're not so eroded for obvious reasons.

[Aaron LeClair]

Originally Posted by fitzbew88

All I see are just normal craters with eroded central uplifts.

The Moon has a million of them, although they're not so eroded for obvious reasons.

Same here.

[rohnds]

Would you two like to explain how they are formed.

Let me get this right. You 2 noted a asteroid or meteor impact looking at the 2nd photo? How?

I thought asteroid or meteor impact look like this ...





Rohn

[rohnds]

After you guys have explained how the above 2 formations were created by asteroid and meteor impact (and then natural erosions), take a look at this comparison



Rohn

[fitzbew88]

Originally Posted by rohnds

After you guys have explained how the above 2 formations were created by asteroid and meteor impact (and then natural erosions), take a look at this comparison

The basic idea is that a high velocity "object" hits the ground. The object's kinetic energy is turned into heat which melts the soil --- the soil (in a temporary liquid state) rebounds vertically --- bouncing back from the impact. If it cools fast enough it leaves a hemispherical formation (an uplift) in the center of the crater.

Add in a few hundred million years of erosion, and you get what you are looking at on Mars.

On the Moon, where there is no atmosphere, these craters do not experience significant erosion and they can stay in a very pristine state. Just take a pair of 8x-10x binoculars out and look at the Moon the next time it is visible and you'll see a million of them.

The high velocity "object" could be a meteor, a comet, --- even falling debris from another strike elsewhere on the planet. The nature of the object will impact the nature of the crater. The object could explode in the air and the crater would be formed by an explosive force. Or it could be ice when it hits. Or it could be a rock.

Crashing alien spacecraft usually leave diagonal lines, from where they fired their reverse thrusters at the last second in a desperate attempt to save themselves. (Earth is not on a lot of the older interstellar maps and this has caused no end of awkward discussions at Intergalactic Council meetings.)

[rohnds]

Originally Posted by fitzbew88

The basic idea is that a high velocity "object" hits the ground. The object's kinetic energy is turned into heat which melts the soil --- the soil (in a temporary liquid state) rebounds vertically --- bouncing back from the impact. If it cools fast enough it leaves a hemispherical formation (an uplift) in the center of the crater.

At velocity does this happen. There are crater on Earth (2nd photo I posted) and every other planet. Yet I have not seen this anywhere else. Care to explain why?

Rohn

[rohnds]

Here is a wooden beam that Opportunity ran on Sol 115.



closeup of the object,


Rohn

[fitzbew88]

Originally Posted by rohnds

At velocity does this happen.

Yes.

Originally Posted by rohnds

There are crater on Earth (2nd photo I posted) and every other planet. Yet I have not seen this anywhere else. Care to explain why?

Well, I'd hazard a guess you just haven't bothered to look at the Moon using some decent binoculars.

You should be able to find images of any closely-photographed planet/moon ( which has little atmosphere ) with similar features in craters.

Here's a picture of Mercury showing many craters with central uplifts.
Mercury

Now, if you don't mind, my dilithium crystals are slightly misaligned and I've got to get back on it. Our Chief Engineer is a real stickler and I don't want to get on his bad side.