The Laschamp event and the demise of Neanderthals

Daylight63 said:
Very interesting claim.

What was the rock you were collecting (specifically)?
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QED. You can't read and comprehend on the college level...or senior HS level for that matter. Sad.

While you are good at Googling, Perry, you're not so good at understanding the results
Cypress said:
The only direct experience I have with paleomagnetic research was collecting field samples in the South American Andes for a paleomagnetic study.
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Sample collection scheme The hierarchy of a generalized paleomagnetic sampling scheme is shown in Figure 4.1. A rock unit is a sequence of beds in a sedimentary sequence or cooling units in an igneous complex, usually a member of a geological formation, an entire formation, or even a sequence of formations. It is advisable to sample at several widely separated localities (perhaps separated by as much as several hundred km). This procedure avoids dependence on results from a single locality and also may provide application of field tests discussed in Chapter 5. A single locality might have been affected by undetected tectonic complications or geochemical processes that have altered the ferromagnetic minerals, whereas a region is less likely to have been systematically affected by these complications. A site is an exposure of a particular bed in a sedimentary sequence or a cooling unit in an igneous complex (i.e., a lava flow or dike). If it is assumed that a primary NRM direction can be determined from the rock unit, results from an individual site provide a record of the geomagnetic field direction at the sampling locality during the (ideally short) time interval when the primary NRM was formed. Multiple sites within a given rock unit are needed to provide adequate time sampling of the geomagnetic field fundamental to most paleomagnetic applications. The proper number of sites for a paleomagnetic study is a matter of debate and is discussed in Chapter 7. Samples are separately oriented pieces of rock. Unless prevented by logistical difficulties (e.g., lakebottom coring, etc.), collection of multiple samples from a site is advised. A common practice is to collect six to eight separately oriented samples from a site spread over 5 to 10 m of outcrop. Comparison of NRM directions from sample to sample within a site allows within-site homogeneity of the NRM to be evaluated.
 
Daylight63 said:
Very interesting claim.

What was the rock you were collecting (specifically)?
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Mudstones of an Miocene sedimentary facies.

The idea at the time was that iron oxide minerals in still and stagnant water would align themselves with the magnetic field, in the absence of a stream or tidal current. Mudstones were assumed to represent a geologic environment of slow moving or stagnant water.
 
Dutch Uncle said:
QED. You can't read and comprehend on the college level...or senior HS level for that matter. Sad.

While you are good at Googling, Perry, you're not so good at understanding the results


Sample collection scheme The hierarchy of a generalized paleomagnetic sampling scheme is shown in Figure 4.1. A rock unit is a sequence of beds in a sedimentary sequence or cooling units in an igneous complex, usually a member of a geological formation, an entire formation, or even a sequence of formations. It is advisable to sample at several widely separated localities (perhaps separated by as much as several hundred km). This procedure avoids dependence on results from a single locality and also may provide application of field tests discussed in Chapter 5. A single locality might have been affected by undetected tectonic complications or geochemical processes that have altered the ferromagnetic minerals, whereas a region is less likely to have been systematically affected by these complications. A site is an exposure of a particular bed in a sedimentary sequence or a cooling unit in an igneous complex (i.e., a lava flow or dike). If it is assumed that a primary NRM direction can be determined from the rock unit, results from an individual site provide a record of the geomagnetic field direction at the sampling locality during the (ideally short) time interval when the primary NRM was formed. Multiple sites within a given rock unit are needed to provide adequate time sampling of the geomagnetic field fundamental to most paleomagnetic applications. The proper number of sites for a paleomagnetic study is a matter of debate and is discussed in Chapter 7. Samples are separately oriented pieces of rock. Unless prevented by logistical difficulties (e.g., lakebottom coring, etc.), collection of multiple samples from a site is advised. A common practice is to collect six to eight separately oriented samples from a site spread over 5 to 10 m of outcrop. Comparison of NRM directions from sample to sample within a site allows within-site homogeneity of the NRM to be evaluated.
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Perry is already starting off the morning seething with latent resentment.
 
Cypress said:
Mudstones of an Miocene sedimentary facies.
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So now I'm REALLY curious. How were they going to do the paleomagnetics on sedimentary rocks? What technique?

Cypress said:
The idea at the time was that iron oxide minerals in still and stagnant water would align themselves with the magnetic field, in the absence of a stream or tidal current. Mudstones were assumed to represent a geologic environment of slow moving or stagnant water.
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Very interesting.
 
Cypress said:
Perry is already starting off the morning seething with latent resentment.
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No, just curiosity. I know you need me to be pissed off, I'm just curious dude. You had an interesting experience and I'm just asking you about it.

Try to calm yourself down today. Let's have a nice day. OK?
 
Dutch Uncle said:
QED. You can't read and comprehend on the college level...or senior HS level for that matter. Sad.

While you are good at Googling, Perry, you're not so good at understanding the results


Sample collection scheme The hierarchy of a generalized paleomagnetic sampling scheme is shown in Figure 4.1. A rock unit is a sequence of beds in a sedimentary sequence or cooling units in an igneous complex, usually a member of a geological formation, an entire formation, or even a sequence of formations. It is advisable to sample at several widely separated localities (perhaps separated by as much as several hundred km). This procedure avoids dependence on results from a single locality and also may provide application of field tests discussed in Chapter 5. A single locality might have been affected by undetected tectonic complications or geochemical processes that have altered the ferromagnetic minerals, whereas a region is less likely to have been systematically affected by these complications. A site is an exposure of a particular bed in a sedimentary sequence or a cooling unit in an igneous complex (i.e., a lava flow or dike). If it is assumed that a primary NRM direction can be determined from the rock unit, results from an individual site provide a record of the geomagnetic field direction at the sampling locality during the (ideally short) time interval when the primary NRM was formed. Multiple sites within a given rock unit are needed to provide adequate time sampling of the geomagnetic field fundamental to most paleomagnetic applications. The proper number of sites for a paleomagnetic study is a matter of debate and is discussed in Chapter 7. Samples are separately oriented pieces of rock. Unless prevented by logistical difficulties (e.g., lakebottom coring, etc.), collection of multiple samples from a site is advised. A common practice is to collect six to eight separately oriented samples from a site spread over 5 to 10 m of outcrop. Comparison of NRM directions from sample to sample within a site allows within-site homogeneity of the NRM to be evaluated.
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So this was the trip the Cypress went on? Isn't that dangerously close to doxxing Cypress?

Remember: my question was about the rocks Cy was collecting and the work HE was doing.
 
Daylight63 said:
So this was the trip the Cypress went on? Isn't that dangerously close to doxxing Cypress?

Remember: my question was about the rocks Cy was collecting and the work HE was doing.
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^^^
Can't read and comprehend on the college level. Maturity level of a 13 year old.
 
Dutch Uncle said:
^^^
Can't read and comprehend on the college level. Maturity level of a 13 year old.
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What are you doing on this discussion now? Oh, yeah, nothing. You didn't go to the Andes to collect mudstone. So why are you interjecting your "opinion" of me here?

Needing attention today?

Now why don't we talk SCIENCE instead of your grievance airing (which is constant)
 
Dutch Uncle said:
Why did you stop bragging about being a GeoChem PhD, Perry? Was it because you knew everyone was laughing at you?
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I have no such degree. Neither do you. Neither does Cy. I'm just curious about Cy's actual experience with the mudstone and the paleomag. It honestly sounded interesting.


But now we are many, many posts into this "discussion" and so far almost no real science has been mentioned. If Cy were like most REAL scientists I've met he wouldn't be able to stop himself from talking more at length about it.

That's starting to reveal a picture in this current discussion.
 
Dutch Uncle said:
Why did you stop bragging about being a GeoChem PhD, Perry? Was it because you knew everyone was laughing at you?
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I think the pretense stopped after it became obvious people with bachelor's and master's degrees were just as intellectually capable, if not more so, than our resident glorious geochemistry PhD.
 
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