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Author Topic:   How to make sand.
Dr Adequate
Member (Idle past 284 days)
Posts: 16113
Joined: 07-20-2006


Message 13 of 121 (429825)
10-21-2007 10:39 PM
Reply to: Message 12 by iceage
10-21-2007 12:53 PM


Re: Flood Sand Production
I suppose if pushed YECers would have to resort to sand being made in the creation week.
No, if pushed, about 25% of them would come up with that. The others would come up with hypotheses completely inconsistent with that that are also stupid and wrong.
'Scuse me, I am feeling a bit testy right now.

This message is a reply to:
 Message 12 by iceage, posted 10-21-2007 12:53 PM iceage has not replied

  
Dr Adequate
Member (Idle past 284 days)
Posts: 16113
Joined: 07-20-2006


Message 95 of 121 (589924)
11-05-2010 2:12 AM
Reply to: Message 94 by jar
11-04-2010 10:20 PM


Re: Still looking for a Creationist model to make sand.
And God said: "Let there be sand". And there was sand.

This message is a reply to:
 Message 94 by jar, posted 11-04-2010 10:20 PM jar has replied

Replies to this message:
 Message 96 by jar, posted 11-05-2010 11:24 AM Dr Adequate has not replied

  
Dr Adequate
Member (Idle past 284 days)
Posts: 16113
Joined: 07-20-2006


Message 108 of 121 (595983)
12-11-2010 8:44 PM
Reply to: Message 104 by jar
12-11-2010 4:10 PM


Re: Questions Pertaining To Current Model
Well, you failed to clarify the intent of your statement.
the current model is outlined in the Original Post, but I'll repeat it for you.
Well, I don't think you've got that right.
Sand is mostly quartz. The reason for this is that chemical weathering (not, as you seem to suggest, mechanical weathering) dissolves the other minerals in granitic rocks or (in the case of feldspars) converts them to clay.
Quartz is extremely resistant to chemical weathering, so the grains of quartz remain and are transported by wind or water.
This, by the way, explains why there is a maximum size to sand grains --- they have an upper limit set by the way that granite crystalizes as the granite-forming magma cools.
Mechanical weathering, and freezing in particular, plays a relatively small part. (You can tell how large a part mechanical weathering and erosion has played by looking at the composition of the sand: more mechanical weathering and erosion corresponds to a higher proportion of non-quartz material such as feldspar.)

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 Message 104 by jar, posted 12-11-2010 4:10 PM jar has replied

Replies to this message:
 Message 109 by jar, posted 12-11-2010 8:47 PM Dr Adequate has replied
 Message 116 by Minnemooseus, posted 12-20-2010 10:09 PM Dr Adequate has replied

  
Dr Adequate
Member (Idle past 284 days)
Posts: 16113
Joined: 07-20-2006


Message 110 of 121 (595988)
12-11-2010 9:13 PM
Reply to: Message 109 by jar
12-11-2010 8:47 PM


Re: Questions Pertaining To Current Model
Well, we might as well be accurate. Apart from anything else, the actual details of the model have greater predictive and explanatory power --- we can explain the normal size and mineral composition of sand grains; whereas someone who maintains that sand was magicked into existence In The Beginning by God has to explain why he made sand consistent with an actualist model rather than, for example, making it out of 3mm grains of feldspar, which he could have done if he wanted to.

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 Message 109 by jar, posted 12-11-2010 8:47 PM jar has seen this message but not replied

  
Dr Adequate
Member (Idle past 284 days)
Posts: 16113
Joined: 07-20-2006


Message 117 of 121 (597346)
12-20-2010 11:32 PM
Reply to: Message 116 by Minnemooseus
12-20-2010 10:09 PM


Re: Mechanical (physical) vs. chemical weathering
Anyhow, more weathering of any variety would create a higher quartz proportion.
I meant a higher proportion of feldspar than there would be if the weathering was predominantly chemical, not a higher proportion of feldspar than quartz.

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 Message 116 by Minnemooseus, posted 12-20-2010 10:09 PM Minnemooseus has replied

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