[FRIAM] "Weather line" on 14

steve smith sasmyth at swcp.com
Fri Jun 21 15:43:37 EDT 2024 

As I think I remember it, I think the opening scenes to Tom Hanks "News 
of the World" were shot in that vicinity... minor aside is that the 
"wagon trail" he was on looked like a 2 track modern-vehicle road... 
wear patterns/stance appropriate to a pickup truck not a 19 century 
wagon trail.

On 6/21/24 11:40 AM, Frank Wimberly wrote:
> >The dike is dated to 26.55 million years ago
>
> No wonder it was there when I was a child.
>
> ---
> Frank C. Wimberly
> 140 Calle Ojo Feliz,
> Santa Fe, NM 87505
>
> 505 670-9918
> Santa Fe, NM
>
> On Fri, Jun 21, 2024, 9:19 AM Stephen Guerin 
> <stephen.guerin at simtable.com> wrote:
>
>     Research last night on historical geologic maps got the name of
>     that as the "Galisteo Dike". composition and description in
>     attachment. There is one further with as well. Also known as the
>     Creston or Comanche Gap
>
>     https://galisteo.nmarchaeology.org/sites/creston.html
>
>
>     Basic formation given this description (chatGPT):
>
>
>     The Galisteo Dike is a geological formation characterized by its
>     composition and physical properties, indicating its formation
>     through volcanic activity. Here’s a detailed interpretation of its
>     formation based on the description provided:
>
>     1. **Composition Analysis**: The Galisteo Dike consists of
>     micro-monzonite, a fine-grained igneous rock. It contains a
>     mixture of minerals including plagioclase, potassium feldspar,
>     titan-augite, titaniferous biotite, apatite, and opaque grains in
>     a glass groundmass. This mineral composition suggests that the
>     dike formed from magma that cooled relatively quickly, preventing
>     the formation of large crystals.
>
>     2. **Physical Description**: The dike appears as a dark gray,
>     fine-grained rock with a salt and pepper texture. It weathers to
>     dark brown or grayish brown and forms a wall-like rampart. This
>     implies that the dike is resistant to weathering and erosion,
>     standing out in the landscape as a prominent feature.
>
>     3. **Structural Features**: The dike is described as comprising
>     many right echelon overlapping segments varying in length from 200
>     to 1200 feet and up to 18 feet thick. This pattern of overlapping
>     segments indicates that the magma was injected into pre-existing
>     fractures in the surrounding rock, likely under significant
>     pressure, causing the fractures to open and propagate in an en
>     echelon pattern.
>
>     4. **Geological Age**: The dike is dated to 26.55 million years
>     ago, placing its formation in the Oligocene epoch. This was a time
>     of significant tectonic activity in many parts of the world, often
>     associated with volcanic and plutonic intrusions.
>
>     ### Formation Process
>     1. **Magma Intrusion**: The formation of the Galisteo Dike began
>     with the intrusion of magma into fractures in the Earth's crust.
>     The magma, originating from deeper within the mantle, was rich in
>     the minerals described and had a high temperature, allowing it to
>     flow and penetrate the fractures.
>
>     2. **Cooling and Crystallization**: As the magma moved upward
>     through the fractures, it began to cool and solidify. The rapid
>     cooling near the surface resulted in the fine-grained texture of
>     the rock, with minerals crystallizing quickly in the groundmass of
>     glass.
>
>     3. **Fracture Propagation**: The injection of magma caused the
>     fractures to propagate, leading to the characteristic right
>     echelon overlapping segments. This suggests that the fractures did
>     not open uniformly but rather stepped along the strike, with each
>     segment forming as a discrete intrusion event.
>
>     4. **Weathering and Erosion**: Over millions of years, the
>     surrounding rock may have eroded away, leaving the more resistant
>     dike exposed as a wall-like structure. The weathering of the dike
>     itself results in the observed dark brown or grayish brown coloration.
>
>     In summary, the Galisteo Dike was formed by the intrusion of magma
>     into fractures in the crust, followed by rapid cooling and
>     crystallization, resulting in a fine-grained igneous rock with
>     distinct mineral composition and structural features indicative of
>     significant volcanic activity during the Oligocene epoch.
>     ____________________________________________
>     CEO Founder, Simtable.com
>     stephen.guerin at simtable.com
>
>     Harvard Visualization Research and Teaching Lab
>     stephenguerin at fas.harvard.edu
>
>     mobile: (505)577-5828
>
>     On Fri, Jun 21, 2024, 9:08 AM Nicholas Thompson
>     <thompnickson2 at gmail.com> wrote:
>
>         Dear Stephen,
>
>         Thank you for prompting me to respond to this inquiry.  I was
>         having some trouble getting the image to behave on my
>         computer, and so was reluctant to wade in.
>
>          Indeed, just as nature abhors vacuums, she abhors straight
>         lines, and so any line as straight as this one requires a
>         special explanation.  To me, that the line points
>         southwestward toward the radar site NW of ABQ suggests a radar
>         artifact, perhaps the shadow or some distant hill.  As we
>         watched the animated radar image, we could see a persistent
>         weakness in the radar echo along that line, even as the clouds
>         crossed it.
>
>         Speaking of abhorrent straight lines, during our conversation
>         with Frank, we spent quite a lot of time discussing another
>         line, a berm of sand that runs across the Galisteo Basin in
>         roughly the same orientation, perhaps 50' high?.  I had
>         noticed this feature on topo maps and always assumed it was an
>         old railway embankment.  Frank, who knows the area well,
>         thought that idea was absurd.  So, we were left with the
>         puzzle of a highly linear geological formation several miles
>         long.
>
>         Could it be that this geological straight line accounts for
>         the straight line cloud formation that Mr. Kadlubek  sees? As
>         the dry line breaks down in anticipation of the SW Monsoon,
>         moist air does indeed move northward, following the river
>         valleys up from TX.   AT some point, it will be raised enough
>         that its moisture is condensed leading to the release of
>         latent heat and the further development of clouds.  If the
>         structure that raises it is a straight line, then the clouds
>         themselves will be arranged in a straight line.  We can see
>         this effect often along linear coast lines as a sea breeze
>         front topped by (usually) fair weather cumulus.  However,
>         given all the dramatic topography in the area, it's hard for
>         me to imagine that this low lying feature would be determining
>         very often.
>
>         I, too, live for the weather.  I don't live for Face Book,
>         however.  So if you have any way to put in touch with Mr.
>         Kadlubek, he and I could perhaps have coffee when I get back
>         to Santa Fe in the fall.
>
>         Yours faithfully,
>
>         Nick Thompson
>         "Behavioral Meteorologist"
>
>
>
>
>
>
>
>
>
>         On Wed, Jun 19, 2024 at 7:06 PM Stephen Guerin
>         <stephen.guerin at simtable.com> wrote:
>
>             Nick,
>
>             It's your time to shine! Respond to Vince.
>
>             In the comments, local knowledge refers to it as the
>             "prison line" as weather is different on either side of
>             the prison on 14.
>
>
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