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Author Topic:   The Story in the Rocks - Southwestern U.S.
Tanypteryx
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Posts: 1514
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.0


Message 91 of 121 (781972)
04-12-2016 10:22 PM


This is Quil Creek Reservoir, east of the town of Hurricane, Utah. We are looking west Note the exposed strata to the left and the three buttes in the distance. Zoom in for better detail.

Closer to the buttes we can see that they are uplifted on the side facing us and the flat surface on the top now tilts back away from us.

There is a long line of uplifted blocks following the south side of the fault visible here. The outcroppings on the right form an uplifted ridge on the north side of the fault.

I do not know what kinds of forces are buckling the surface along the fault. Are the two sides pushing against each other, or sliding along each other, or is something more complicated going on here?

I am assuming that this is the same Hurricane fault that crosses the Grand Canyon.

I have more shots from different positions including the back sides of the buttes.

I think it is interesting that it looks like the fault runs right through the middle of the reservoir and that houses and the town of Hurricane are right on top of the fault and around the buttes.

Edited by Tanypteryx, : grammer

Edited by Admin, : Narrow image width.


What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy


    
Tanypteryx
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Posts: 1514
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.0


Message 92 of 121 (781973)
04-12-2016 10:30 PM
Reply to: Message 90 by jar
04-12-2016 10:04 PM


wings writes:

Besides, the ashfall deposits may not have been a single continuous event. There is layering within the deposits.


How can you know that is the case?

I am not sure what you mean, but in edge's shot you can see a horizontal band and in many other deposits, I have seen clear layering bands. I do not know what the layering represents as far as the deposition event(s). Sorry if I implied I did.


What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy


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 Message 90 by jar, posted 04-12-2016 10:04 PM jar has responded

Replies to this message:
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jar
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From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 93 of 121 (781974)
04-12-2016 10:59 PM
Reply to: Message 92 by Tanypteryx
04-12-2016 10:30 PM


In the bottom picture above is the ash the white slab like pieces at the bottom of the picture?

Anyone so limited that they can only spell a word one way is severely handicapped!

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 Message 92 by Tanypteryx, posted 04-12-2016 10:30 PM Tanypteryx has responded

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Tanypteryx
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Posts: 1514
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.0


Message 94 of 121 (781976)
04-12-2016 11:17 PM
Reply to: Message 93 by jar
04-12-2016 10:59 PM


In the bottom picture above is the ash the white slab like pieces at the bottom of the picture?

No. Those are sandstone or limestone that were hauled from somewhere else. I think the light colored material that shows in the outcropping on the right is ash.

ABE: the light colored material in the center of the top photo looks like an ash deposit, also.

Edited by Tanypteryx, : No reason given.


What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy


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 Message 93 by jar, posted 04-12-2016 10:59 PM jar has not yet responded

    
edge
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Posts: 3903
From: Colorado, USA
Joined: 01-09-2002
Member Rating: 4.1


(1)
Message 95 of 121 (781977)
04-12-2016 11:28 PM
Reply to: Message 90 by jar
04-12-2016 10:04 PM


How can you know that is the case?

Because there are sandstones and mudstones interbedded with the ash flows. You can see the layering with more fluvial sediments in this picture. The reddish beds are more oxidized than the green-gray reduced beds. The tan beds are more resistant sandstone.

I've also seen burnt coal beds mixed in with the ash. Looking for a picture.


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 Message 90 by jar, posted 04-12-2016 10:04 PM jar has responded

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Tanypteryx
Member
Posts: 1514
From: Oregon, USA
Joined: 08-27-2006
Member Rating: 5.0


Message 96 of 121 (781978)
04-12-2016 11:33 PM
Reply to: Message 95 by edge
04-12-2016 11:28 PM


Coalmine Canyon east of Tuba City has some layers like that, I think

What if Eleanor Roosevelt had wings? -- Monty Python

One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie

If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy


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 Message 95 by edge, posted 04-12-2016 11:28 PM edge has not yet responded

    
jar
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From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 97 of 121 (781986)
04-13-2016 8:14 AM
Reply to: Message 95 by edge
04-12-2016 11:28 PM


So are you saying that in the pinnacle the topmost tan material is sandstone?

Is the greenish part below that volcanic ash?

What is the tan material at the bottom?


Anyone so limited that they can only spell a word one way is severely handicapped!

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 Message 95 by edge, posted 04-12-2016 11:28 PM edge has responded

Replies to this message:
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edge
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From: Colorado, USA
Joined: 01-09-2002
Member Rating: 4.1


Message 98 of 121 (782017)
04-13-2016 2:05 PM
Reply to: Message 97 by jar
04-13-2016 8:14 AM


So are you saying that in the pinnacle the topmost tan material is sandstone?

Yes, that layer is more resistant to erosion.

Is the greenish part below that volcanic ash?

Yes, and there are several layers of it.

What is the tan material at the bottom?

It is another layer of sandstone.

ETA: By the way, if you google 'volcanic ash', you can get a lot of interesting photographs including fossils.

Edited by edge, : No reason given.


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 Message 97 by jar, posted 04-13-2016 8:14 AM jar has responded

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jar
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Posts: 29140
From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 99 of 121 (782020)
04-13-2016 3:19 PM
Reply to: Message 98 by edge
04-13-2016 2:05 PM


Yes, and there are several layers of it.

How do you know there are several layers of it?


Anyone so limited that they can only spell a word one way is severely handicapped!

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 Message 98 by edge, posted 04-13-2016 2:05 PM edge has responded

Replies to this message:
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edge
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Posts: 3903
From: Colorado, USA
Joined: 01-09-2002
Member Rating: 4.1


Message 100 of 121 (782034)
04-14-2016 12:09 AM
Reply to: Message 99 by jar
04-13-2016 3:19 PM


How do you know there are several layers of it?

Contrasting colors and textures, coal seams, etc.

Maybe pictures don't do it justice...


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 Message 99 by jar, posted 04-13-2016 3:19 PM jar has responded

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 Message 101 by jar, posted 04-14-2016 8:30 AM edge has responded

  
jar
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Posts: 29140
From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 101 of 121 (782038)
04-14-2016 8:30 AM
Reply to: Message 100 by edge
04-14-2016 12:09 AM


You've mentioned coal seams several times. How would a coal seam get formed?

Anyone so limited that they can only spell a word one way is severely handicapped!

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 Message 100 by edge, posted 04-14-2016 12:09 AM edge has responded

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 Message 102 by edge, posted 04-14-2016 1:49 PM jar has responded

  
edge
Member
Posts: 3903
From: Colorado, USA
Joined: 01-09-2002
Member Rating: 4.1


Message 102 of 121 (782045)
04-14-2016 1:49 PM
Reply to: Message 101 by jar
04-14-2016 8:30 AM


You've mentioned coal seams several times. How would a coal seam get formed?

In between eruptions, in a swamp-type of environment. Remember there are sandstone and shale interbedded with the ash as well. Some of the sand is pretty clearly fluvial and it's only a short step from there to a swamp or bog.
This message is a reply to:
 Message 101 by jar, posted 04-14-2016 8:30 AM jar has responded

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jar
Member
Posts: 29140
From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 103 of 121 (782048)
04-14-2016 2:45 PM
Reply to: Message 102 by edge
04-14-2016 1:49 PM


Swamps and bogs are one thing, mud stone and shale another, but how can actual coal be explained?

Anyone so limited that they can only spell a word one way is severely handicapped!

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 Message 102 by edge, posted 04-14-2016 1:49 PM edge has responded

Replies to this message:
 Message 104 by edge, posted 04-14-2016 3:24 PM jar has responded

  
edge
Member
Posts: 3903
From: Colorado, USA
Joined: 01-09-2002
Member Rating: 4.1


Message 104 of 121 (782049)
04-14-2016 3:24 PM
Reply to: Message 103 by jar
04-14-2016 2:45 PM


quote:
Swamps and bogs are one thing, mud stone and shale another, but how can actual coal be explained?

Are you saying that river sediments, sands and muds are not found with coal beds?

I suppose there are some alternate ideas out there ...

Here is a link to a review on how coal forms.

https://www.uky.edu/KGS/coal/coalform.htm

And here is a picture of fluviatile sediments associated with coal in a New Mexico coal mine.

Coal occurs at the bottom of the mine, with sandstone and mudstone layers above it. You can see a sandstone channel at the top of the highwall on the left edge of the image.

Now, just imagine this sequence being deposited during a volcanic episode of rather large proportion, derived from one or more of the larger volcanic fields in the region.

Perhaps I'm not explaining very well here, but I know that as we drilled for deep oil fields in the region, we encountered a lot of coal on the way down through the clay beds that you've seen in the these photos. I've also seen layers of 'clinker', the term for baked clay related to coal seam fires, interbedded with the ash; certainly ancient in timing.


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 Message 103 by jar, posted 04-14-2016 2:45 PM jar has responded

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 Message 105 by jar, posted 04-14-2016 4:24 PM edge has responded

  
jar
Member
Posts: 29140
From: Texas!!
Joined: 04-20-2004
Member Rating: 2.8


Message 105 of 121 (782050)
04-14-2016 4:24 PM
Reply to: Message 104 by edge
04-14-2016 3:24 PM


So you are saying that there are actual layers of coal between layers of volcanic ash, correct?

Edited by jar, : No reason given.


Anyone so limited that they can only spell a word one way is severely handicapped!

This message is a reply to:
 Message 104 by edge, posted 04-14-2016 3:24 PM edge has responded

Replies to this message:
 Message 106 by edge, posted 04-14-2016 5:08 PM jar has responded

  
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