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Author Topic:   Exploring the Grand Canyon, from the bottom up.
petrophysics1
Inactive Member


Message 166 of 282 (301899)
04-07-2006 9:16 AM
Reply to: Message 165 by roxrkool
04-06-2006 3:17 PM


Re: Exploring the Dox Formation.
Rox,

You're doing a great job!

Jar,

Thanks for starting this thread. I've enjoyed reading it and in particular your layman's questions.

I hope the following will help rather than confuse. I would like you both to go somewhere with me and I'll tell you what I see going on. Use the first picture in post 165 as a reference. Remember, this picture is a snapshot of one moment in time, sometime in the past. Today we have the complete rock sequence of the Dox to look at. I'd like to use this picture to show you how it got there.

Rox, Jar and I are standing in a lagoon just on top of the Shinumo sand. It's pretty muddy but once in a while, because of a storm or heavy rainfall, we see some sand show up. It's coming from that delta we see off landward of us. Problem is the water is getting deeper (or the ground sinking) and our lagoon is slowly moving off to the West(landward,see pix). Our delta's sand and mud deposition can't keep up with the sea level rise so we see it and our lagoon moving off to the West. What this is doing is laying a layer of lagoon mud on top of the Shinumo sand.Where we are the water is getting deeper and deeper. We're going to stay right here,even if we drown, but watch what is happening.(this is the deposition of Unit 1)

Finally sea level stops rising and that delta of ours is starting to prograde, build it's way back towards us. Most of its deposition is close to the delta mouth and stacking up all that mud and sand there creates an unstable condition. Once in a while it slumps and a turbidity current developes which makes it out to us and we are buried in the mud and fine sand. The delta is moving toward us so this is happening more and more. We are being buried by a distal turbidite sequence.(deposition of unit 2)

Holy Molly! This delta won't stop and is getting even closer. We are being buried by more and coarser grained sand from the closer and more powerful proximal turbidites on the delta's depositional slope.(deposition of unit 3)

Don't know about you guys, but I'm getting tired of being beat up by these turbidity currents. The delta is now so close we are on the pro-delta slope. This is cool, except once in a while, because the sediment we are standing on is unstable, it slumps away from under us. It is the beginning of a turbidity curent that will deposit sand and mud seaward of us now, making the sediments of units 2 and 3.
(deposition of unit 4)

A note. In the Dox we don't ever quite get to the uppermost and sud-aerially exposed part of this deltaic sequence. The part with the main distributary mouth bars, swamps, marshes, and fluvial (river) deposits. It may exist, but be presently underground where no one can see it, or it may have not been preserved. On the picture, look at the extent of facies unit 4. See it doesn't quite make it to the top part of the delta.

This is a very generalized discription of what occured based on Rox's reference. IT IS NO WAY NEAR GOOD ENOUGH, to say, explore for oil or gas with. I could easily spend a year just figuring out a delta or part of it to be able to predict,where a here to unfound, sand and oil deposit exists.

I hope this explanation has been of some value.

This message has been edited by petrophysics, 04-07-2006 07:19 AM

This message has been edited by petrophysics, 04-07-2006 11:25 AM


This message is a reply to:
 Message 165 by roxrkool, posted 04-06-2006 3:17 PM roxrkool has responded

Replies to this message:
 Message 167 by Coragyps, posted 04-07-2006 9:28 AM petrophysics1 has not yet responded
 Message 168 by AdminJar, posted 04-07-2006 10:24 AM petrophysics1 has not yet responded
 Message 169 by roxrkool, posted 04-07-2006 11:45 AM petrophysics1 has not yet responded
 Message 172 by PurpleYouko, posted 04-11-2006 9:48 AM petrophysics1 has not yet responded

  
Coragyps
Member
Posts: 5365
From: Snyder, Texas, USA
Joined: 11-12-2002
Member Rating: 3.2


Message 167 of 282 (301903)
04-07-2006 9:28 AM
Reply to: Message 166 by petrophysics1
04-07-2006 9:16 AM


Re: Exploring the Dox Formation.
Hi, petrophysics! Welcome to EvC!

Pretty part of Wyoming you live in, I'll bet. What's the bars:churches ratio in Boulder?


This message is a reply to:
 Message 166 by petrophysics1, posted 04-07-2006 9:16 AM petrophysics1 has not yet responded

    
AdminJar
Inactive Member


Message 168 of 282 (301919)
04-07-2006 10:24 AM
Reply to: Message 166 by petrophysics1
04-07-2006 9:16 AM


Welcome to EvC
Glad you dropped in and hope you'll continue with us in this thread.


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  • This message is a reply to:
     Message 166 by petrophysics1, posted 04-07-2006 9:16 AM petrophysics1 has not yet responded

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    roxrkool
    Member (Idle past 875 days)
    Posts: 1493
    From: Nevada
    Joined: 03-23-2003


    Message 169 of 282 (301968)
    04-07-2006 11:45 AM
    Reply to: Message 166 by petrophysics1
    04-07-2006 9:16 AM


    Re: Exploring the Dox Formation.
    Great visual. I often attempt to build those same sorts of images for people because I think it's easier for the layperson to understand. I'm not sure how well they work, however. No one ever says, "AHA!!! I get it now!!" lol

    Hope you stick around and add to this discussion. I suspect these depositional settings are right in your ballpark (several friends are petrophsycists in Houston and New Orl... errr Houston :)).


    This message is a reply to:
     Message 166 by petrophysics1, posted 04-07-2006 9:16 AM petrophysics1 has not yet responded

        
    roxrkool
    Member (Idle past 875 days)
    Posts: 1493
    From: Nevada
    Joined: 03-23-2003


    Message 170 of 282 (303007)
    04-10-2006 6:11 PM
    Reply to: Message 168 by AdminJar
    04-07-2006 10:24 AM


    Re: Welcome to EvC
    Should we move onto the next member or do you still have questions, jar?
    This message is a reply to:
     Message 168 by AdminJar, posted 04-07-2006 10:24 AM AdminJar has not yet responded

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     Message 171 by jar, posted 04-10-2006 6:13 PM roxrkool has not yet responded

        
    jar
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    Message 171 of 282 (303008)
    04-10-2006 6:13 PM
    Reply to: Message 170 by roxrkool
    04-10-2006 6:11 PM


    Moving on
    Sure, let's move on unless we need to do another updated summary.


    Aslan is not a Tame Lion
    This message is a reply to:
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    PurpleYouko
    Member
    Posts: 713
    From: Columbia Missouri
    Joined: 11-11-2004


    Message 172 of 282 (303151)
    04-11-2006 9:48 AM
    Reply to: Message 166 by petrophysics1
    04-07-2006 9:16 AM


    Re: Exploring the Dox Formation.
    As Rox said above, very nice visualization.

    I was following along pretty well already but this really helps everything fall into place.


    This message is a reply to:
     Message 166 by petrophysics1, posted 04-07-2006 9:16 AM petrophysics1 has not yet responded

      
    jar
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    From: Texas!!
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    Message 173 of 282 (305461)
    04-20-2006 11:32 AM


    what is the next member?
    I'd like to try to work through the history of the Super Group at least in this thread.


    Aslan is not a Tame Lion
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    Codegate
    Member (Idle past 626 days)
    Posts: 84
    From: The Great White North
    Joined: 03-15-2006


    Message 174 of 282 (313519)
    05-19-2006 12:01 PM
    Reply to: Message 173 by jar
    04-20-2006 11:32 AM


    -- bump --
    I'm not sure how 'bumping' threads is viewed here so if I am erring by doing so please let me know.

    This is one of the most intersting threads that I have ever read anywhere on the net and I would very much like to see it continue. I've learned a lot from it and I would expect that many others have also.

    Now that there has been a bit of a break, would the major players (Jar, rox, moose) be willing to pick this up again? I'm being pretty selfish here, but I would really like to see this thread finish up and complete the picture of the Grand Canyon.


    This message is a reply to:
     Message 173 by jar, posted 04-20-2006 11:32 AM jar has not yet responded

      
    jar
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    Message 175 of 282 (313534)
    05-19-2006 12:37 PM


    calling rox, petrophysics and other geologists.
    Looks like folk really are reading what you're writing. I know I've learned a lot so far.

    Please come out and play. I'll even let YOU have the ball!


    Aslan is not a Tame Lion
    Replies to this message:
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    AdminAsgara
    Administrator (Idle past 281 days)
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    Message 176 of 282 (330946)
    07-11-2006 8:04 PM


    Bump
    Information that might be interesting considering some recent threads.
        
    Hyroglyphx
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    From: Austin, TX
    Joined: 05-03-2006
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    Message 177 of 282 (336407)
    07-29-2006 5:46 PM


    Grand Canyon

    Whatever event that allowed for the formation of the Grand Canyon must have been concievably great. How does the pro-evolution camp explain the Grand Canyon and how do Creationists explain it? Does either side have compelling evidence? Parcelling through this thread I've read alot of speculation coming from different trains of thought. I thought I'd share a different perspective from an acquantence of mine who takes excursions to the Grand Canyon nearly once a week. Like the individual in this clip, I used to live in Flagstaff, AZ which is just 61 miles from the South Rim. I have visited the Canyon three times and on each trip I've come to understand how implausible the pro-evolution theory really is.

    http://creationministries.org/media/mshgc_hi.asx

    Edited by AdminJar, : off topic


    “Always be ready to give a defense to
    everyone who asks you a reason for the
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    –1st Peter 3:15
        
    Hyroglyphx
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    Message 178 of 282 (336518)
    07-29-2006 10:12 PM


    Off topic?
    How is what I posted off topic? It speaks about the Deluge, and more specifically, it speaks about the Grand Canyon as it pertains to the Flood. I'm not sure how much more "on-topic" it could be.

    Why do you regard this as being OT?


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    AdminAsgara
    Administrator (Idle past 281 days)
    Posts: 2073
    From: The Universe
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    Message 179 of 282 (336525)
    07-29-2006 10:50 PM
    Reply to: Message 178 by Hyroglyphx
    07-29-2006 10:12 PM


    Re: Off topic?
    NJ, the OP for this thread states:

    I'd like for us to discuss the Grand Canyon, beginning with the lowest, oldest layers and then working up to the top, layer by layer. I'd like to see explanations for each layer, it's composition, the environment when it was created, and get questions about that layer answered before we move up to the next layer.

    If you want to discuss a non-mainstream hypothesis please start a new thread.


    AdminAsgara Queen of the Universe

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    This message is a reply to:
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    RAZD
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    Message 180 of 282 (336646)
    07-30-2006 2:15 PM
    Reply to: Message 178 by Hyroglyphx
    07-29-2006 10:12 PM


    Re: Off topic? - use another thread
    A better thread for this assertion is Flood not the Cause of the Grand Canyon -- Not a Biased Opinion

    You can even read some of the reasons given before jumping in. This has been covered several times, and is another creationist PRATT.


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