Yes Mark's definition more closely defines a conglomerate and, more distantly, a breccia.
A Gabbro is a type rock, usually with large visible crystals(indicating a slow cooling), plutonic in origin and, contains feldspar and pyroxenes (--if I remember correctly. Let me find my rock-types book(vs mineral book)to make sure)
I think to be a gabbro it must contain olivne form within the pyroxenes but can't say for certain.
Bowen where are you?(as in Bowen's Reaction Series)
Elton
N Lehrman wrote:
> Mark & others, > > This is totally absurd. Look up "gabbro" if you can spell it. Then > write. > > Norm (an earth geologist that doesn't make up new definitions---) > > ----- Original Message ----- > *From:* Mark Ferguson <mailto:[EMAIL PROTECTED]> > *To:* tett <mailto:[EMAIL PROTECTED]> > *Cc:* [EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]> > *Sent:* Saturday, October 18, 2003 7:49 PM > *Subject:* Re: [meteorite-list] NEW Eucrite, absolutely the > strangest ever seen! > > Hi Tett and list > > A gabro is a collection of individual rocks (they don't have to be > the same kind of rock either) welded or held together by some > cemmenting substance. Here on earth, the cemment can be > cristobalite, opal, limestone, stiltstone, and many other items. A > cemment with rock in it is a manmade gabro. So, gabroic infers > that it is like a gabro. > > Mark >
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