Re: Hypothesis Involving Planetoid Impacts

Christof Kuhn [EMAIL PROTECTED] wrote:
>Professor Gauss wrote:
>> Not being a geologist, I am new to this group, but have a hypothesis and I
>was
>> wondering if it has been discussed yet by geologists, either here or
>elsewhere.
>
>On subjects like this, you'll find plenty of discussions here, some of 
>them more serious and some less, but most of them in a quite emotional 
>way, so expect the worst, then you may be positively surprised :-)
>
>>  Here is the hypothesis:
>> 
>> 1) The early earth was smaller than it is now.  It had a crust floating on
>top
>> of a mantle which covered the entire earth.  The crust formed following an
>> extended period of chemical reactions at the earth's surface.  A possible
>> example of such a reaction is the hydration of minerals caused by the
>> absorption of water from the atmosphere.
>> 
>A similar theory is used by the so-called Earth Expansionists.
>
>Many scientists think that the continental crust formed by magma 
>differentiation on top of the mantle (which is not molten, just to be 
>sure...).

You state that the mantle is solid, and (later) that the only liquid portion of
the earth's interior is the outer core.  I thought that the mantle was liquid
and thus supports continental drift.

BTW, thank you for your kind reply.  And I did enjoy at least one flame, from
George, who agreed with me that I am not a geologist.  Although it is OK to
know that I am not wrong about everything, nothing worthwhile was contributed
by his reply.  Thanks again.
--
To hear is to forget,
To see is to remember,
To do is to understand.
-- Ancient Chinese proverb