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

From: Jeff Kuyken <info_at_meteoritecentral.com>
Date: Thu Mar 16 18:08:36 2006
Message-ID: <006c01c648e2$8f452540$6501a8c0_at_mandin4f89ypwu>

Hi Larry,

Thanks for that! Yeah... I was wondering about it from the whole 'size
matters' perspective. For example: can a 500m crater be a complex one... can
a 1km crater be one... or are we talking more like 3km, 5km or more?!?!?!

Cheers,

Jeff


----- Original Message -----
From: Larry Lebofsky
To: Jeff Kuyken
Cc: Meteorite List
Sent: Thursday, March 16, 2006 9:02 PM
Subject: Re: [meteorite-list] Impact Structures - Simple vs Complex?


Hi Jeff:

It has been some time since I studied this (will ask around here at the
Lunar
and Planetary Science Conference), but I think that it is basically: size
matters!

How big of a hole can you maintain in a bowl shape before gravity and the
strength of the material take over?

Larry

Quoting Jeff Kuyken <info_at_meteorites.com.au>:

> 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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--
Dr. Larry A. Lebofsky
Senior Research Scientist
Co-editor, Meteorite

Received on Thu 16 Mar 2006 05:15:27 AM PST