Michel: IMHO, "it all depends". From my research, the best I could come up with:
quoted from my web-site: http://www.ottawa.rasc.ca/astronomy/earth_craters/intro.html
"In this article, I will present the craters that I have explored in the order of their size, starting with simple craters, moving to complex craters and finishing with multiring basins. The transition size between simple to complex craters is 2km in sediments and 4km in crystalline rocks. The transition size between complex to ringed basin craters is 10 to 50 km."
I would love more input on this. Thanks Charles O'Dale Meeting Chair Ottawa RASC http://www.ottawa.rasc.ca/astronomy/earth_craters/index.html
Date: Sun, 13 Nov 2005 17:05:06 +0100 From: "michel FRANCO" <[EMAIL PROTECTED]> Subject: [meteorite-list] Minimum crater size for central uplift ? To: <[email protected]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="us-ascii" Dear list I was wandering what is the minimum size of terrestrial impact crater that show a central uplift. Best regards Michel FRANCO IMCA 3869
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