[meteorite-list] Impact Structures - Simple vs Complex?

[Kevin Forbes]

Hi Jeff, yes it does depend mainly on the size of the impactor and its 
velocity and the gravitational force of the body being impacted, Complex 
craters on the moon have a different set of minimum diameters than on Earth, 
yes there is an actual formula for it, I have lost it at the moment, this 
question does re-appear every now and then, if you locate the formulae for 
working it out, please let me know.

Cheers, Kevin, VK3UKF.

>From: "Jeff Kuyken" <info at meteorites.com.au>
>To: "Meteorite List" <meteorite-list at meteoritecentral.com>
>Subject: [meteorite-list] Impact Structures - Simple vs Complex?
>Date: Wed, 15 Mar 2006 23:01:29 +1100
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>
>Here's a question for those of you more familiar with impact structures on
>Earth. I believe I saw somewhere that craters fall into 2 main categories?
>simple and Complex with the later having a central uplift, concentric 
>rings,
>etc among other things.
>
>My question is: How small can a complex crater be? Is there a definitive
>size restraint or does it completely depend on a multitude of variables 
>such
>as the make-up of the impacting body, velocity, impact angle, target rock,
>etc?
>
>Any help is appreciated,
>
>Jeff Kuyken
>Meteorites Australia
>www.meteorites.com.au
>
>
>
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