[meteorite-list] Discovery of a Double Impact Crater in Libya

From: Sterling K. Webb <kelly_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:02 2004
Message-ID: <3FE3E8BB.C885686D_at_bhil.com>

Hi, Charles,

    That was my question exactly!
    First, they are close enough for the LDG to come from them, no further
than moldavites to the Ries.
    Second, they're big enough to be the source.
    The real question is "How old are they?" LDG is 28.x million years old.
The article says the surface is Cretaceous sandstone covered with recent
soils, so the craters are more than a couple of million years old and
younger than 62 million years.
    The other funny thing is at that point in time (28-34 million years ago)
this area was a swamp in the process of drying up. The high silica content
of LDG suggests they were formed from sand.

Sterling K. Webb
---------------------------------------------------------------------------
Charles Viau wrote:

> Fantastic!
> The somewhat obvious question is that could these structures possibly be
> a source for Libyan Desert Glass, or is the source for that material
> already well known?
>
> CharlyV
>
Received on Sat 20 Dec 2003 01:14:22 AM PST