[meteorite-list] Minimum crater size for central uplift ?

From: MexicoDoug_at_aol.com <MexicoDoug_at_meteoritecentral.com>
Date: Sun Nov 13 15:26:33 2005
Message-ID: <105.6d6484f7.30a8fb6d_at_aol.com>

michel wrote:

>I was wandering what is the minimum size of terrestrial impact crater
>that show a central uplift.

Hola Michel, Would that be the B.P. Structure in Libya? It is around 2 km
in diameter, but relatively older than the other nicely formed craters like
Meteor Crater... Perhaps in the Libyan-Argelian environment, it could be
pushed a bit lower than 2km in diameter, especially with an energetic iron
impactor to form a complex (central-uplifted) crater, though the physicists might
place a theoretical limit on this taking into consideration the properties of
the ground zero and the value gravity on Earth. The greater the gravity the
more likely a complex crater, so Earth ought to have the smallest diameter
complex craters in the known Solar System without having to wade through the
clouds of gas giants to see if a stable surface could be found with craters.
Saludos, Doug
Received on Sun 13 Nov 2005 03:26:21 PM PST