https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0904-7
Abstract
The definitive existence of a giant impact crater, two times larger than
the Chixulub crater in the Yucatan peninsula, from an extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica, remain
controversial. Here, we use the latest high-resolution
gravito-topographic geopotential (SatGravRET 2014) model over Antarctica
to offer a plausible confirmation of its existence. SatGravRET 2014 has
a spatial resolution between 1 and 10 km at most places and included contemporary space gravimetry and gradiometry data from GRACE and GOCE,
and other data including Bedmap 2 bedrock topography. We computed the gravity disturbances, the Marussi tensor of the second derivatives of
the disturbing potential, the gravity invariants and their specific
ratio, the strike angles and the virtual deformations to quantify the detailed geophysical features for the Wilkes Land anomaly. This set of
the gravitational parameters revealed enhanced and more detailed
geophysical features on the Wilkes Land Crater than previously possible
only with the traditional gravity anomalies. Our findings support prior studies stating that in the Wilkes Land there is a huge impact
crater/basin with detectable gravity mascon which is mostly consistent
with the characteristics of an impact crater.
The discussion includes the following: "These results widen space for geophysical interpretations and speculations. The huge impact had a planetary consequence, including for example the striking antipodal relationship of it to the Siberian Raps (claimed by von Frese et al. 2009).".
If "Siberian Raps" really means Siberian Traps, the paleontological implications are obvious.
On 4/13/25 9:07 AM, erik simpson wrote:
https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0904-7
Abstract
The definitive existence of a giant impact crater, two times larger
than the Chixulub crater in the Yucatan peninsula, from an
extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica,
remain controversial. Here, we use the latest high-resolution
gravito-topographic geopotential (SatGravRET 2014) model over
Antarctica to offer a plausible confirmation of its existence.
SatGravRET 2014 has a spatial resolution between 1 and 10 km at most
places and included contemporary space gravimetry and gradiometry data
from GRACE and GOCE, and other data including Bedmap 2 bedrock
topography. We computed the gravity disturbances, the Marussi tensor
of the second derivatives of the disturbing potential, the gravity
invariants and their specific ratio, the strike angles and the virtual
deformations to quantify the detailed geophysical features for the
Wilkes Land anomaly. This set of the gravitational parameters revealed
enhanced and more detailed geophysical features on the Wilkes Land
Crater than previously possible only with the traditional gravity
anomalies. Our findings support prior studies stating that in the
Wilkes Land there is a huge impact crater/basin with detectable
gravity mascon which is mostly consistent with the characteristics of
an impact crater.
The discussion includes the following: "These results widen space for
geophysical interpretations and speculations. The huge impact had a
planetary consequence, including for example the striking antipodal
relationship of it to the Siberian Raps (claimed by von Frese et al.
2009).".
If "Siberian Raps" really means Siberian Traps, the paleontological
implications are obvious.
I'm supposing it would be very difficult to date this impact. Is the association with the Siberian traps solely their antipodal position?
Would that have been true at the time of the traps?
On 4/13/25 5:35 PM, John Harshman wrote:
On 4/13/25 9:07 AM, erik simpson wrote:
https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0904-7
Abstract
The definitive existence of a giant impact crater, two times larger
than the Chixulub crater in the Yucatan peninsula, from an
extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica,
remain controversial. Here, we use the latest high-resolution
gravito-topographic geopotential (SatGravRET 2014) model over
Antarctica to offer a plausible confirmation of its existence.
SatGravRET 2014 has a spatial resolution between 1 and 10 km at most
places and included contemporary space gravimetry and gradiometry
data from GRACE and GOCE, and other data including Bedmap 2 bedrock
topography. We computed the gravity disturbances, the Marussi tensor
of the second derivatives of the disturbing potential, the gravity
invariants and their specific ratio, the strike angles and the
virtual deformations to quantify the detailed geophysical features
for the Wilkes Land anomaly. This set of the gravitational parameters
revealed enhanced and more detailed geophysical features on the
Wilkes Land Crater than previously possible only with the traditional
gravity anomalies. Our findings support prior studies stating that in
the Wilkes Land there is a huge impact crater/basin with detectable
gravity mascon which is mostly consistent with the characteristics of
an impact crater.
The discussion includes the following: "These results widen space for
geophysical interpretations and speculations. The huge impact had a
planetary consequence, including for example the striking antipodal
relationship of it to the Siberian Raps (claimed by von Frese et al.
2009).".
If "Siberian Raps" really means Siberian Traps, the paleontological
implications are obvious.
I'm supposing it would be very difficult to date this impact. Is the
association with the Siberian traps solely their antipodal position?
Would that have been true at the time of the traps?
Not sure about the positioning.-a Getting a date would involve a lot of
deep drilling.-a I also wonder if there is any record of finding tektites from such an impact.-a I've no idea of how long they would last.
https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0904-7
Abstract
The definitive existence of a giant impact crater, two times larger than
the Chixulub crater in the Yucatan peninsula, from an extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica, remain
controversial. Here, we use the latest high-resolution
gravito-topographic geopotential (SatGravRET 2014) model over Antarctica
to offer a plausible confirmation of its existence. SatGravRET 2014 has
a spatial resolution between 1 and 10 km at most places and included contemporary space gravimetry and gradiometry data from GRACE and GOCE,
and other data including Bedmap 2 bedrock topography. We computed the gravity disturbances, the Marussi tensor of the second derivatives of
the disturbing potential, the gravity invariants and their specific
ratio, the strike angles and the virtual deformations to quantify the detailed geophysical features for the Wilkes Land anomaly. This set of
the gravitational parameters revealed enhanced and more detailed
geophysical features on the Wilkes Land Crater than previously possible
only with the traditional gravity anomalies. Our findings support prior studies stating that in the Wilkes Land there is a huge impact
crater/basin with detectable gravity mascon which is mostly consistent
with the characteristics of an impact crater.
The discussion includes the following: "These results widen space for geophysical interpretations and speculations. The huge impact had a planetary consequence, including for example the striking antipodal relationship of it to the Siberian Raps (claimed by von Frese et al. 2009).".
If "Siberian Raps" really means Siberian Traps, the paleontological implications are obvious.
On 4/13/25 09:07, erik simpson wrote:
https://earth-planets-space.springeropen.com/articles/10.1186/s40623-018-0904-7
Abstract
The definitive existence of a giant impact crater, two times larger
than the Chixulub crater in the Yucatan peninsula, from an
extraterrestrial origin, 1.6 km beneath Wilkes Land, East Antarctica,
remain controversial. Here, we use the latest high-resolution
gravito-topographic geopotential (SatGravRET 2014) model over
Antarctica to offer a plausible confirmation of its existence.
SatGravRET 2014 has a spatial resolution between 1 and 10 km at most
places and included contemporary space gravimetry and gradiometry data
from GRACE and GOCE, and other data including Bedmap 2 bedrock
topography. We computed the gravity disturbances, the Marussi tensor
of the second derivatives of the disturbing potential, the gravity
invariants and their specific ratio, the strike angles and the virtual
deformations to quantify the detailed geophysical features for the
Wilkes Land anomaly. This set of the gravitational parameters revealed
enhanced and more detailed geophysical features on the Wilkes Land
Crater than previously possible only with the traditional gravity
anomalies. Our findings support prior studies stating that in the
Wilkes Land there is a huge impact crater/basin with detectable
gravity mascon which is mostly consistent with the characteristics of
an impact crater.
The discussion includes the following: "These results widen space for
geophysical interpretations and speculations. The huge impact had a
planetary consequence, including for example the striking antipodal
relationship of it to the Siberian Raps (claimed by von Frese et al.
2009).".
If "Siberian Raps" really means Siberian Traps, the paleontological
implications are obvious.
Maybe I am reading this article way off, but it seems to me that
it might imply that some remnants of the theoretical crater might
be in Australia, based upon the theory of continental drift.
Australia in geologic time might have been closer to Antarctica than
it is now.-a A lot of Australia now is not under a lot of ice like
Antarctica is, and this might make some data easier to gather in some
ways.-a Can you find any data or articles on the theoretical Australian remnants of the crater if such data or such a crater exists?
gravito-topographic geopotential
gravito-topographic geopotential
On 4/15/25 4:40 PM, erik simpson wrote:
gravito-topographic geopotential
HOW do you measure gravity?
On 4/15/25 4:40 PM, erik simpson wrote:
gravito-topographic geopotential
How do you measure gravity?
THe easiest way is to buy a device that is made for that purpose.
On 2025-04-16 10:25:03 +0000, Popping Mad said:
On 4/15/25 4:40 PM, erik simpson wrote:
gravito-topographic geopotential
How do you measure gravity?
The easiest way is to buy a device that is made for that purpose.
On 4/17/25 02:03, Mikko wrote:
On 2025-04-16 10:25:03 +0000, Popping Mad said:
On 4/15/25 4:40 PM, erik simpson wrote:
gravito-topographic geopotential
How do you measure gravity?
The easiest way is to buy a device that is made for that purpose.
Devices made for a specific purpose are often vastly expensive
in comparison with another near equal device made for another
purpose.
Of course some times they may appear near equal, but maybe
they are not.
It is often of course also easier to buy something that
is more expensive in comparison with something that is
less expensive.-a At least unless you do not have the money
(like taking out a loan).
I have read that something like a 'Pangea' may have formed
at the end of the Permian, and may have 'separated' some
near the end of the Triassic.-a This (might) have produced
some climate change across some of the world's land areas
and this (might) have resulted in some extinctions.
I am open to the idea that something else may be possible.
On 4/17/25 5:03 AM, Mikko wrote:
THe easiest way is to buy a device that is made for that purpose.
like a troll. A troll is senstive to gravity waves
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