Number of days writer Richard Kerr has failed to inform his Science readers of the confirmation of nanodiamonds at the YDB: 2 years, 4 months, and 29 days
Thanks for posting this. Meanwhile, a comment on Astrobob indicates another lady found a 17 gram piece of the Sutter’s Hill meteorite fall in the park today, not sure which one, Lotus village park or the big state park. It shouldn’t take too long to check out most of the village streets.
I’m wondering how many people will be out there looking?
I want to make a few comments on combustion in impacts.
We pretty much know that for a 60 meter Tunguska class object, the infra-red from the airburst is sufficient to set vegetation on fire, but those flames are extinguished by the airburst’s blast wave.
We know from Libyan Desert Glass that some classes of impacts can generate extremely high surface temperatures.
We know from Rio Cuarto that the infra-red thrown off by a tangential impactor is sufficient to set the surface under its flight path on fire.
The same phenomena has been calculated to be the result of the entry of pellets from a hard impactor fragmented near the Earth. In other words, if you have enough meteors entering the Earth’s atmosphere at once, then the infra-red can be sufficient to generate surface combustion temperatures.
Another cause of combustion in impacts is the landing of bediasites thrown out from a large impact.
Two large structures which may be associated with the HSIE are Ilturalde and Lloydsminster. Neither has been examined closely to see if they date from 10,900 BCE. Further, neither has been examined for type of impactor or angle and direction of entry.
A logical search pattern would be to treat these as locations is an elliptical debris field, and look for other astroblemes along that field’s axis.
Whether the resulting combustion products accumulate in wetlands is a question I have to leave for others.
I will note is this regard that the Pleistocene climate was far different than the YD climate and the Holocene climate.
Now we come to the question of where exactly upper atmospheric impact dust, bediasites, and combustion products are going to “pool” or concentrate.
If they are dry, clearly most of these are capable of being lofted by winds. If not dry, in other words if they are wet, they will adhere or cohere.
Assuming a far higher rate of cometary impact than is commonly held (an estimate without any foundation other than known to be flawed studies from the 1960′s), then it should come as no surprise that impact products might accumulate in standing water, and accumulate in pools of standing water quite often over time.
Its the concentrations of them that might be indicative of the sizes, locations, and dates of larger impacts.
To my short list of sources of combustion in impact, I need to add the infra-red from a large surface impactor’s “pipe”.
“Pipe” – while it is commonly visualized that a large surface impact generates a “plume” like that of a nuclear explosion, in point of fact there is a vacuum left behind by a large impactors passage through the Earth’s atmosphere.
The mechanics of large hypervelocity surface impacts resemble those of an armor piercing shell, which explains the mechanism by which tektites are formed.
One of the most surprising results is
that the impact pipe looks like a funnel when seen from a very great distance, as the Earth’s atmosphere grows less dense with altitude.
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Thanks for posting this. Meanwhile, a comment on Astrobob indicates another lady found a 17 gram piece of the Sutter’s Hill meteorite fall in the park today, not sure which one, Lotus village park or the big state park. It shouldn’t take too long to check out most of the village streets.
I’m wondering how many people will be out there looking?
I want to make a few comments on combustion in impacts.
We pretty much know that for a 60 meter Tunguska class object, the infra-red from the airburst is sufficient to set vegetation on fire, but those flames are extinguished by the airburst’s blast wave.
We know from Libyan Desert Glass that some classes of impacts can generate extremely high surface temperatures.
We know from Rio Cuarto that the infra-red thrown off by a tangential impactor is sufficient to set the surface under its flight path on fire.
The same phenomena has been calculated to be the result of the entry of pellets from a hard impactor fragmented near the Earth. In other words, if you have enough meteors entering the Earth’s atmosphere at once, then the infra-red can be sufficient to generate surface combustion temperatures.
Another cause of combustion in impacts is the landing of bediasites thrown out from a large impact.
Two large structures which may be associated with the HSIE are Ilturalde and Lloydsminster. Neither has been examined closely to see if they date from 10,900 BCE. Further, neither has been examined for type of impactor or angle and direction of entry.
A logical search pattern would be to treat these as locations is an elliptical debris field, and look for other astroblemes along that field’s axis.
Whether the resulting combustion products accumulate in wetlands is a question I have to leave for others.
I will note is this regard that the Pleistocene climate was far different than the YD climate and the Holocene climate.
Now we come to the question of where exactly upper atmospheric impact dust, bediasites, and combustion products are going to “pool” or concentrate.
If they are dry, clearly most of these are capable of being lofted by winds. If not dry, in other words if they are wet, they will adhere or cohere.
Assuming a far higher rate of cometary impact than is commonly held (an estimate without any foundation other than known to be flawed studies from the 1960′s), then it should come as no surprise that impact products might accumulate in standing water, and accumulate in pools of standing water quite often over time.
Its the concentrations of them that might be indicative of the sizes, locations, and dates of larger impacts.
Some Addenda –
To my short list of sources of combustion in impact, I need to add the infra-red from a large surface impactor’s “pipe”.
“Pipe” – while it is commonly visualized that a large surface impact generates a “plume” like that of a nuclear explosion, in point of fact there is a vacuum left behind by a large impactors passage through the Earth’s atmosphere.
The mechanics of large hypervelocity surface impacts resemble those of an armor piercing shell, which explains the mechanism by which tektites are formed.
One of the most surprising results is
that the impact pipe looks like a funnel when seen from a very great distance, as the Earth’s atmosphere grows less dense with altitude.