Re: [asa] How rocks were formed

Amen, Jon

In fact some of the list commentary can be used in the preparation of
FAQs on these topics.

Jack Haas

Jon Tandy wrote:
> Just wanted to say, I appreciate Burgy posting and others commenting
> on these AIG "updates", painful as it may be for those who know better
> to keep dealing with the same issues.
> Jon Tandy
>
> -----Original Message-----
> *From:* asa-owner@lists.calvin.edu
> [mailto:asa-owner@lists.calvin.edu] *On Behalf Of *Charles Carrigan
> *Sent:* Saturday, September 16, 2006 11:08 PM
> *To:* asa@calvin.edu
> *Subject:* Re: [asa] How rocks were formed
>
> Comments below.
> _______________________________
> Charles W. Carrigan, Ph.D.
> Assistant Professor of Geology
> Olivet Nazarene Univ., Dept. of Physical Sciences
> One University Ave.
> Bourbonnais, IL 60914
> PH: (815) 939-5346
> FX: (815) 939-5071
> ccarriga@olivet.edu <mailto:ccarriga@olivet.edu>
> http://geology.olivet.edu/
> "To a naturalist nothing is indifferent;
> the humble moss that creeps upon the stone
> is equally interesting as the lofty pine which so beautifully
> adorns the valley or the mountain:
> but to a naturalist who is reading in the face of the rocks the
> annals of a former world,
> the mossy covering which obstructs his view,
> and renders indistinguishable the different species of stone,
> is no less than a serious subject of regret."
> - James Hutton
> _______________________________
>
>
> >>> "burgytwo@juno.com" <burgytwo@juno.com> 9/16/2006 2:29 PM >>>
> From AIG this week -- do your science with Genesis!
> Q: Doesn’t granite take millions of years to form?
> A: According to evolutionary geologists, granite is made of a number
> of compounds that were mixed together under extreme heat. Supposedly
> they rose slowly to the earth’s crust, and then cooled over thousands
> of years to form the granites we see today.
>
> However, evolutionary geologists have discovered something. Some of
> the crystals found in granites near the earth’s surface will not
> withstand temperatures over 800° Celsius for more than 50 years
> without being destroyed. This is a big problem for these scientists
> and their previous theories about the origin of granite.
>
> The idea that blobs of molten rock rose slowly through the crust and
> cooled for eons of time is now in question. Evolutionary geologists
> are now changing their ideas and are starting to look to more
> catastrophic events to explain the origin of rocks, like granites.
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> Wow talk about simplistic and ridiculous. Impossible to tell what
> they are really talking about here, but I'll take a guess. After
> all, their claims usually have a small hint of truth that is then
> corrupted to suit their means.
> It is true that many minerals found in granites near the Earth's
> surface are not stable at magmatic temperature. These minerals are
> secondary, alteration minerals that are produced by altering the
> original, primary, magmatic minerals formed directly from the
> melt. These alterations take place because the conditions of
> formation (i.e., conditions in the hot magma chamber) are not the
> same as the conditions at the surface of the Earth where the rocks
> are now found. Pressure and temperature are both much lower, and
> composition is wildly different due to the presence of oxidizing
> and acidic fluids, i.e., water with dissolved H+ and O2. This
> water tears the crystal structure of the magmatic minerals apart
> and creates new minerals in their place that are not stable at
> magmatic temperature. So, yes, igneous rocks do contain minerals
> not stable at igneous temperatures - but that has NOTHING to do
> with their origin as molten magma.
> There is no way that "The idea that blobs of molten rock rose
> slowly through the crust and
> cooled for eons of time is now in question" is a true statement!!
> Furthermore, I can think of zero papers in the last few years that
> called for catastrophic events to explain the origin of granites -
> where do they make this stuff up?!?!? How embarrassing.
> Best,
> Charles
>

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Received on Mon Sep 18 07:38:10 2006