A Reminder!
RT News Report- Gang of Asteroids: Russian meteor may have followers on same path - Video
Nearly 20 known asteroids believed to be on the same path according to RT News.
Gang of Asteroids: Russian meteor may have followers on same path
Posted to YouTube byRT 54,268 views
Russian Meteor Might Have Siblings in Tow - Scientific American
www.scientificamerican.com
Aug 2, 2013 - Orbital estimates have pinpointed 20 asteroids on similar paths to the space rock that exploded near Chelyabinsk in February. Aug 5, 2013 |By ...
2014 The Year of "CERTAIN Uncertainty" ™; Meteors, Asteroids, Comets, and MORE!!
Showing posts with label impact. Show all posts
Showing posts with label impact. Show all posts
01 March 2014
03 January 2014
The Latest Worldwide Meteor/Meteorite New 03JAN2014
Latest Worldwide Meteor/Meteorite News: NEO Asteroidss Close ...
January historically is an active month for fireball meteor activity so stay alert and have your cameras ready! -LunarMeteoriteHunter...Tokyo 2014 AA ...
lunarmeteoritehunters.blogspot.com/.../neo-asteroidss-close-ap...
First Asteroid Discovered in 2014 Has Impact (2014 AA)
NASA/JPL Near-Earth Object Program Office- January 2, 2014
Early Wednesday morning January 1st, while New Year's 2014 celebrations
were still underway in the United States, the Catalina Sky Survey near
Tucson, AZ, collected a single track of observations with an immediate
follow-up on what was possibly a very small asteroid 2-3 meters in size
on a potential impact trajectory with the Earth. Designated 2014 AA,
which would make it the first asteroid discovery of 2014, the track of
observations on the object allowed only an uncertain orbit to be
calculated. However if this was a very small asteroid on an Earth
impacting trajectory, it most likely hit the Earth's atmosphere last
night sometime between 2 pm Wednesday and 9 am Thursday EST. Using the
only available observations, three independent projections of the
possible orbit by the independent orbit analyst Bill Gray, the Minor
Planet Center in Cambridge, MA, and Steve Chesley at the NASA NEO
Program Office at the Jet Propulsion Laboratory are in agreement that it
would hit Earths atmosphere. According to Chesley, because of the orbit
uncertainty the potential impact locations are widely distributed,
falling along an arc extending from Central America to East Africa with
the best-fit, most likely impact location to be just off the coast of
West Africa at about 9 pm EST January 1st. 2014 AA was unlikely to have
survived atmospheric entry intact, as it was comparable in size to 2008
TC3 - about 2-3 meters which completely broke up over northern Sudan in
October 2008, the only other example of an object discovered just prior
to hitting the Earth. So far, there have been a few weak signals
collected from infrasound stations in that region of the world that are
being analyzed to see if they could be correlated to the atmospheric
entry of 2014 AA.
Tiny Asteroid Discovered Just Yesterday “Virtually Certain” to Have Harmlessly Impacted Earth
By Phil Plait- Jan 2, 2014
For just the second time in history, an asteroid was discovered before
it impacted the Earth. Don't panic: It was very small, probably just a
few meters across, and burned up harmlessly in our atmosphere. But after
events of the past year, it underscores the need to keep our eyes open. ...
We Saw It Coming: Dinky Asteroid Hits Earth, Burns UpDiscovery News - 4 hours
For only the second time in history, an asteroid has hit Earth that was discovered hours before impact. Continue reading →
First Meteor Shower of 2014 Peaks Friday, but Sun ... - Yahoo News
From Yahoo News: Early each January, the Quadrantid meteor shower provides one of the most intense annual celestial fireworks displays, with a ...
news.yahoo.com/first-meteor-shower-2014-peaks-friday-sun-i...
Tonight's Meteor Shower: Live, From Space, It's The Quadrantids ...
If you haven't heard of the Quadrantids, don't worry. Even NASA calls them "a little-known meteorshower named after an extinct constellation." But in ...
www.wlrh.org/.../tonights-meteor-shower-live-space-its-quadr...
Yahoo Answers - Great spots to watch meteor shower in philippines?
exact location pls :) im from manila so yeah it sucks watching the sky here :)) ... i dont kno ... I can't tell you exactly where, but I can pretty well assure you ...
ph.answers.yahoo.com/question/index?qid...
Quadrantid Meteor Shower To Peak Tomorrow, Jan. 3 (LIVESTREAM VIDEO)
January historically is an active month for fireball meteor activity so stay alert and have your cameras ready! -LunarMeteoriteHunter...Tokyo 2014 AA ...
lunarmeteoritehunters.blogspot.com/.../neo-asteroidss-close-ap...
First Asteroid Discovered in 2014 Has Impact (2014 AA)
NASA/JPL Near-Earth Object Program Office- January 2, 2014
Early Wednesday morning January 1st, while New Year's 2014 celebrations
were still underway in the United States, the Catalina Sky Survey near
Tucson, AZ, collected a single track of observations with an immediate
follow-up on what was possibly a very small asteroid 2-3 meters in size
on a potential impact trajectory with the Earth. Designated 2014 AA,
which would make it the first asteroid discovery of 2014, the track of
observations on the object allowed only an uncertain orbit to be
calculated. However if this was a very small asteroid on an Earth
impacting trajectory, it most likely hit the Earth's atmosphere last
night sometime between 2 pm Wednesday and 9 am Thursday EST. Using the
only available observations, three independent projections of the
possible orbit by the independent orbit analyst Bill Gray, the Minor
Planet Center in Cambridge, MA, and Steve Chesley at the NASA NEO
Program Office at the Jet Propulsion Laboratory are in agreement that it
would hit Earths atmosphere. According to Chesley, because of the orbit
uncertainty the potential impact locations are widely distributed,
falling along an arc extending from Central America to East Africa with
the best-fit, most likely impact location to be just off the coast of
West Africa at about 9 pm EST January 1st. 2014 AA was unlikely to have
survived atmospheric entry intact, as it was comparable in size to 2008
TC3 - about 2-3 meters which completely broke up over northern Sudan in
October 2008, the only other example of an object discovered just prior
to hitting the Earth. So far, there have been a few weak signals
collected from infrasound stations in that region of the world that are
being analyzed to see if they could be correlated to the atmospheric
entry of 2014 AA.
Tiny Asteroid Discovered Just Yesterday “Virtually Certain” to Have Harmlessly Impacted Earth
By Phil Plait- Jan 2, 2014
For just the second time in history, an asteroid was discovered before
it impacted the Earth. Don't panic: It was very small, probably just a
few meters across, and burned up harmlessly in our atmosphere. But after
events of the past year, it underscores the need to keep our eyes open. ...
We Saw It Coming: Dinky Asteroid Hits Earth, Burns UpDiscovery News - 4 hours
For only the second time in history, an asteroid has hit Earth that was discovered hours before impact. Continue reading →
First Meteor Shower of 2014 Peaks Friday, but Sun ... - Yahoo News
From Yahoo News: Early each January, the Quadrantid meteor shower provides one of the most intense annual celestial fireworks displays, with a ...
news.yahoo.com/first-meteor-shower-2014-peaks-friday-sun-i...
Tonight's Meteor Shower: Live, From Space, It's The Quadrantids ...
If you haven't heard of the Quadrantids, don't worry. Even NASA calls them "a little-known meteorshower named after an extinct constellation." But in ...
www.wlrh.org/.../tonights-meteor-shower-live-space-its-quadr...
Yahoo Answers - Great spots to watch meteor shower in philippines?
exact location pls :) im from manila so yeah it sucks watching the sky here :)) ... i dont kno ... I can't tell you exactly where, but I can pretty well assure you ...
ph.answers.yahoo.com/question/index?qid...
Quadrantid Meteor Shower To Peak Tomorrow, Jan. 3 (LIVESTREAM VIDEO)
The Huffington Post UK - 2 hours
Mere days after the start of the new year, skywatchers in the Northern Hemisphere will be treated to the first meteor shower of 2014. Set to ...
Star-gazers invited to view meteor shower at Dalby Forest
Mere days after the start of the new year, skywatchers in the Northern Hemisphere will be treated to the first meteor shower of 2014. Set to ...
Star-gazers invited to view meteor shower at Dalby Forest
Darlington and Stockton Times
SCARBOROUGH and Ryedale Astronomical Society will hold a free star-gazing event at the Courtyard, Dalby Forest tonight (Friday, January 3) from ...
See all stories on this topic »
Star gazers in for a treat this month
SCARBOROUGH and Ryedale Astronomical Society will hold a free star-gazing event at the Courtyard, Dalby Forest tonight (Friday, January 3) from ...
See all stories on this topic »
Star gazers in for a treat this month
Times of India
Known as the quadrantids meteor shower, also popularly called 'shooting stars', can now be spotted in the pollution-free clear skies away from city ...
Quadrantid Meteor Shower 2014: Peak time Jan. 2-3, Watch online ...
Christian Today > The Quadrantid Meteor Shower is one of the exciting star shows of the New Year and is expected to peak later this week on January ...
www.christiantoday.com/article/...meteor.../35231.htm
The Latest Worldwide Meteor/Meteorite News 02JAN2014
The list of major meteor showers hasn't changed much in recent decades, but it has changed a little.Meteor showers are part of nature, after all, and .
lunarmeteoritehunters.blogspot.com/.../the-latest-worldwide-m...
The Best Meteor Shower You've Never Heard of: The QuadrantidsSlate Magazine (blog)
The new year is still shiny and new, and it's off to a good start: The annual Quadrantid meteor shower peaks tomorrow! With no Moon to interfere with it ...
Watch Meteor Shower Live Online Tonight
Brevard Times
The 2014 Quadrantids, a little-known meteor shower named after an extinct constellation, will present an excellent chance for hardy souls to start the ...
Quadrantid meteor shower to peak amid bitter cold
Baltimore Sun (blog)
If skies clear of clouds and snow before dawn early Friday, there's a chance the Quadrantid meteorshower could be visible over Maryland.
Catch a Great Meteor Shower This Weekend!
Huffington Post (blog)
Meteor showers are easy to observe, as they are best viewed with the naked eye alone, simply gazing straight up at the zenith, the highest point in the ...
2014 The Year of CERTAIN Uncertainty; Meteors, Asteroids, Comets, and MORE!!
Known as the quadrantids meteor shower, also popularly called 'shooting stars', can now be spotted in the pollution-free clear skies away from city ...
Quadrantid Meteor Shower 2014: Peak time Jan. 2-3, Watch online ...
Christian Today > The Quadrantid Meteor Shower is one of the exciting star shows of the New Year and is expected to peak later this week on January ...
www.christiantoday.com/article/...meteor.../35231.htm
The Latest Worldwide Meteor/Meteorite News 02JAN2014
The list of major meteor showers hasn't changed much in recent decades, but it has changed a little.Meteor showers are part of nature, after all, and .
lunarmeteoritehunters.blogspot.com/.../the-latest-worldwide-m...
The Best Meteor Shower You've Never Heard of: The QuadrantidsSlate Magazine (blog)
The new year is still shiny and new, and it's off to a good start: The annual Quadrantid meteor shower peaks tomorrow! With no Moon to interfere with it ...
Watch Meteor Shower Live Online Tonight
Brevard Times
The 2014 Quadrantids, a little-known meteor shower named after an extinct constellation, will present an excellent chance for hardy souls to start the ...
Quadrantid meteor shower to peak amid bitter cold
Baltimore Sun (blog)
If skies clear of clouds and snow before dawn early Friday, there's a chance the Quadrantid meteorshower could be visible over Maryland.
Catch a Great Meteor Shower This Weekend!
Huffington Post (blog)
Meteor showers are easy to observe, as they are best viewed with the naked eye alone, simply gazing straight up at the zenith, the highest point in the ...
2014 The Year of CERTAIN Uncertainty; Meteors, Asteroids, Comets, and MORE!!
01 April 2009
CONTACT INFORMATION and AFFILIATION
Impact Field Studies Group
ISFG Field Research Member-ASIA Since 2005
http://web.eps.utk.edu/~faculty/ifsg.htm
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IYA 2009 International Year of Astronomy
Astronomers Without Borders
Regional Coordinator- Southeast Asia Since 2008
Japan Chapter: Japan Planetary Data- Japan Sky Watch
Astronomers Without Borders is dedicated to fostering understanding and goodwill across national and cultural boundaries by creating relationships through the universal appeal of astronomy. Astronomers Without Borders projects promote sharing. Sharing resources. Sharing knowledge. Sharing inspiration. All through a common interest in something basic and universal. Sharing the sky.
http://www.astronomerswithoutborders.org/
------------------------------------------------------------------------------------------------- Planetary Data Japan- Japan Sky Watch
For More Information Contact:
Dirk Ross @ drtanukiATgmail.com
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International Meteorite Collectors Association
Member #5677
Since 2000
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Cross-Links:
Meteorobs · Amateur Meteor Astronomy
http://tech.groups.yahoo.com/group/meteorobs/
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http://www.imcce.fr/imcce.php?lang=en (english version)
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27 February 2009
Another meteor impact coincides with large-scale volcanic eruptions -Planet Earth 27FEB09
http://planetearth.nerc.ac.uk/news/story.aspx?id=332
Another meteor impact coincides with large-scale volcanic eruptions
---Planet Earth online 23 February 2009
Scientists have long debated the cause of the dinosaurs' extinction about 65 million years ago. The remnants of a large volcanic eruption in the Faroe Islands. These eruptions can go on for millions of years. Around this time a giant meteorite struck the Gulf of Mexico. But the extinction also seems to coincide with massive and long-lasting volcanic eruptions in India known as the Deccan Traps. So which event was responsible? And are these phenomena linked?
New research now shows that this combination of meteorite impact andlarge-scale volcanic activity - known as flood basalt eruptions - is not unique. An international team of researchers looked at a 30-million-year-old meteorite crater in Belarus called Logoisk. They found that this too coincided with volcanic eruptions further south which covered Yemen and Ethiopia with basalt rock. These events are similar to those that occurred 65 million years ago, but on a much smaller scale. The scientists suggest such coincidences may be more common than previously thought. Dr Sarah Sherlock from the Open University and lead author of the paper, says, 'If you have a flood basalt then people wonder if there's also an impact. ''There will be, almost certainly,' she added. According to the paper, a meteorite will strike the Earth and leave a crater the size of Logoisk on average once every 1.5 million years. Flood volcanic eruptions occur over several million years, so a Logoisk-sized crater is likely to occur during each of the 16 identified periods of flood volcanism on Earth in the last 360 million years. However, researchers do not think there is a causal link between flood volcanism and meteorite impact.'There is simply no geological evidence to link the two,' says Sherlock. To determine the precise age of the Logoisk crater the researchers used argon dating. 'Argon dating is very versatile.' said Sherlock. 'It's the only technique that can be used to date both [impacts and flood volcanism].' Samples of material from the crater were gradually heated using an infrared laser, causing the release of argon gas. The ratio of two isotopes of argon released in the gas gives an accurate indication ofthe age of the sample. Using this technique, the researchers showed that the two events occurred simultaneously.
One question raised by the results was why the meteorite impact and flood volcanism 65 million years ago wiped out much of life on Earth, including the dinosaurs, but the similar events 30 million years ago did not. According to Sherlock, it was down to the size of the events.'These coincidences in Earth's history are not as rare as people think,but in order to actually do significant damage to the environment they have to be really, really big.' Sherlock added. Together, the 65-million-year-old Chicxulub crater in the Gulf of Mexico and volcanic eruptions that produced the Deccan Traps eruption 65 million years ago released 8000 gigatonnes (Gt) of sulfur dioxide, causing global environmental damage. By comparison the Logoisk and Afro-Arabian events released only 30Gt - insufficient to cause change on a global scale.
The research is published in the Journal of the Geological Society, London.
Another meteor impact coincides with large-scale volcanic eruptions
---Planet Earth online 23 February 2009
Scientists have long debated the cause of the dinosaurs' extinction about 65 million years ago. The remnants of a large volcanic eruption in the Faroe Islands. These eruptions can go on for millions of years. Around this time a giant meteorite struck the Gulf of Mexico. But the extinction also seems to coincide with massive and long-lasting volcanic eruptions in India known as the Deccan Traps. So which event was responsible? And are these phenomena linked?
New research now shows that this combination of meteorite impact andlarge-scale volcanic activity - known as flood basalt eruptions - is not unique. An international team of researchers looked at a 30-million-year-old meteorite crater in Belarus called Logoisk. They found that this too coincided with volcanic eruptions further south which covered Yemen and Ethiopia with basalt rock. These events are similar to those that occurred 65 million years ago, but on a much smaller scale. The scientists suggest such coincidences may be more common than previously thought. Dr Sarah Sherlock from the Open University and lead author of the paper, says, 'If you have a flood basalt then people wonder if there's also an impact. ''There will be, almost certainly,' she added. According to the paper, a meteorite will strike the Earth and leave a crater the size of Logoisk on average once every 1.5 million years. Flood volcanic eruptions occur over several million years, so a Logoisk-sized crater is likely to occur during each of the 16 identified periods of flood volcanism on Earth in the last 360 million years. However, researchers do not think there is a causal link between flood volcanism and meteorite impact.'There is simply no geological evidence to link the two,' says Sherlock. To determine the precise age of the Logoisk crater the researchers used argon dating. 'Argon dating is very versatile.' said Sherlock. 'It's the only technique that can be used to date both [impacts and flood volcanism].' Samples of material from the crater were gradually heated using an infrared laser, causing the release of argon gas. The ratio of two isotopes of argon released in the gas gives an accurate indication ofthe age of the sample. Using this technique, the researchers showed that the two events occurred simultaneously.
One question raised by the results was why the meteorite impact and flood volcanism 65 million years ago wiped out much of life on Earth, including the dinosaurs, but the similar events 30 million years ago did not. According to Sherlock, it was down to the size of the events.'These coincidences in Earth's history are not as rare as people think,but in order to actually do significant damage to the environment they have to be really, really big.' Sherlock added. Together, the 65-million-year-old Chicxulub crater in the Gulf of Mexico and volcanic eruptions that produced the Deccan Traps eruption 65 million years ago released 8000 gigatonnes (Gt) of sulfur dioxide, causing global environmental damage. By comparison the Logoisk and Afro-Arabian events released only 30Gt - insufficient to cause change on a global scale.
The research is published in the Journal of the Geological Society, London.
25 February 2009
'Dinosaur-killing' impact did not start global wildfires 25FEB09
Published online 23 February 2009 Nature doi:10.1038/news.2009.112 Corrected online:
24 February 2009
NATURE NEWS
'Dinosaur-killing' impact did not start global wildfires
by Philip Ball
Burnt oil and gas, not vegetation, may have caused the soot layer at the end of the Cretaceous period.
The impact of a huge asteroid or comet at the end of the Cretaceous period 65 million years ago is generally held responsible for the sudden demise of 60–80% of all species on Earth. But new results challenge the common idea that the extinctions were partly caused by global wildfires triggered by the violent impact.
... full story:
http://www.nature.com/news/2009/090223/full/news.2009.112.html
24 February 2009
NATURE NEWS
'Dinosaur-killing' impact did not start global wildfires
by Philip Ball
Burnt oil and gas, not vegetation, may have caused the soot layer at the end of the Cretaceous period.
The impact of a huge asteroid or comet at the end of the Cretaceous period 65 million years ago is generally held responsible for the sudden demise of 60–80% of all species on Earth. But new results challenge the common idea that the extinctions were partly caused by global wildfires triggered by the violent impact.
... full story:
http://www.nature.com/news/2009/090223/full/news.2009.112.html
19 February 2009
COMET LULIN & SATELLITE DEBRIS UPDATES
Space Weather News for Feb. 18, 2009http://spaceweather.com
COMET LULIN UPDATE: Comet Lulin is approaching Earth and brightening rapidly. Observers say it is now visible to the naked eye as a faint (magnitude +5.6) gassy patch in the constellation Virgo before dawn. Even city dwellers have seen it. Backyard telescopes reveal a vivid green comet in obvious motion. Just yesterday, amateur astronomers watched as a solar wind gust tore away part of the comet's tail, the second time this month such a thing has happened. Lulin's closest approach to Earth (38 million miles) is on Feb. 24th; at that time the comet could be two or three times brighter than it is now.
Browse the gallery for the latest images: http://spaceweather.com/comets/gallery_lulin_page8.htm
SATELLITE DEBRIS: More than a week has passed since the Feb. 10th collision of Iridium 33 and Kosmos 2251 over northern Siberia, and the orbits of some of the largest fragments have now been measured by US Strategic Command. Today's edition of http://Spaceweather.com features global maps showing where the debris is located. Only 26 fragments are currently plotted, but that number will grow as radar tracking of the debris continues. Check back often for updates.
COMET LULIN UPDATE: Comet Lulin is approaching Earth and brightening rapidly. Observers say it is now visible to the naked eye as a faint (magnitude +5.6) gassy patch in the constellation Virgo before dawn. Even city dwellers have seen it. Backyard telescopes reveal a vivid green comet in obvious motion. Just yesterday, amateur astronomers watched as a solar wind gust tore away part of the comet's tail, the second time this month such a thing has happened. Lulin's closest approach to Earth (38 million miles) is on Feb. 24th; at that time the comet could be two or three times brighter than it is now.
Browse the gallery for the latest images: http://spaceweather.com/comets/gallery_lulin_page8.htm
SATELLITE DEBRIS: More than a week has passed since the Feb. 10th collision of Iridium 33 and Kosmos 2251 over northern Siberia, and the orbits of some of the largest fragments have now been measured by US Strategic Command. Today's edition of http://Spaceweather.com features global maps showing where the debris is located. Only 26 fragments are currently plotted, but that number will grow as radar tracking of the debris continues. Check back often for updates.
17 February 2009
Recent Impact Papers Available 16FEB09
Below are some recent papers about impact structures and alleged impactites that have appeared.
1. Schmieder, M., E. Buchner, and D. P. LeHeron, 2009, The Jebel Hadid structure (Al Kufrah Basin ,SE Libya)—A possible impact structure and potential hydrocarbon trap? Marine and Petroleum Geology. vol 26. no. 3, pp. 310-318. doi:10.1016/j.marpetgeo.2008.04.003
http://dx.doi.org/10.1016/j.marpetgeo.2008.04.003
The Jebel Hadid structure is formed in the Nubian Sandstone and located in southern Al Kufrah Basin. It is a 4.7 km circular feature with a set of multiple concentric annular ridges. they suggest "that the Jebel Hadid structure might represent an eroded, complex impact structure' much like the Tin Bider structure in Algeria. Its location is 20º 52' N and 22º 42' E).
2. Ghoneim, E. M., 2008, Ibn-Batutah: A possible simple impact structure in southeastern Libya, a remote sensing study. Geomorphology. vol. 103, no. 3, pp. 341-350. The Ibn-Batutah feature is a circular structure centered on 21° 34′ 10″ N and 20° 50′ 15″ E and located in southeastern Libya. It is formed in Nubian Sandstone.
http://dx.doi.org/10.1016/j.geomorph.2008.07.005http://www.bu.edu/remotesensing/faculty/research/ghoneim/index.html
3. McCall, G. J. H., 2009, Half a century of progress in research on terrestrial impact structures: A review. Earth-Science Reviews.vol 92, no. 3-4, pp. 99-116.
http://dx.doi.org/10.1016/j.earscirev.2008.11.004
4. McCall, G. J. H., in press, The Carbonado diamond conundrum Earth-Science Reviews, In Press, Accepted Manuscript, Available online 13 February 2009. doi:10.1016/j.earscirev.2009.01.002
http://dx.doi.org/10.1016/j.earscirev.2009.01.002
"The reviewer presents the results of a literature search on the enigmatic occurrences of carbonado; a form (but not the only form) of polycrystalline diamond, which is mined for industrial diamonds." He hypothesizes that "carbonado does stem from terrestrial eruptive processes" and concludes that much research remainsto be performed before any conclusions can be reached.5. Schmieder, M., and E. Buchner, 2007, Short note: The Fayabasin (N Chad, Africa) – A possible impact structure? Journal of African Earth Sciences. vol. 47, pp. 62–68.The Faya basin is an almost circular structure, centered on 18º 10' N and 19º 34' E. It lies about 55 km ENE of the city of Faya (Largeau) and has a diameter of about 2 km.
"http://dx.doi.org/10.1016/j.jafrearsci.2006.11.004http://adsabs.harvard.edu/abs/2007JAfES..47...62S
Source: Paul V. Heinrich, Baton Rouge, LA, USA
1. Schmieder, M., E. Buchner, and D. P. LeHeron, 2009, The Jebel Hadid structure (Al Kufrah Basin ,SE Libya)—A possible impact structure and potential hydrocarbon trap? Marine and Petroleum Geology. vol 26. no. 3, pp. 310-318. doi:10.1016/j.marpetgeo.2008.04.003
http://dx.doi.org/10.1016/j.marpetgeo.2008.04.003
The Jebel Hadid structure is formed in the Nubian Sandstone and located in southern Al Kufrah Basin. It is a 4.7 km circular feature with a set of multiple concentric annular ridges. they suggest "that the Jebel Hadid structure might represent an eroded, complex impact structure' much like the Tin Bider structure in Algeria. Its location is 20º 52' N and 22º 42' E).
2. Ghoneim, E. M., 2008, Ibn-Batutah: A possible simple impact structure in southeastern Libya, a remote sensing study. Geomorphology. vol. 103, no. 3, pp. 341-350. The Ibn-Batutah feature is a circular structure centered on 21° 34′ 10″ N and 20° 50′ 15″ E and located in southeastern Libya. It is formed in Nubian Sandstone.
http://dx.doi.org/10.1016/j.geomorph.2008.07.005http://www.bu.edu/remotesensing/faculty/research/ghoneim/index.html
3. McCall, G. J. H., 2009, Half a century of progress in research on terrestrial impact structures: A review. Earth-Science Reviews.vol 92, no. 3-4, pp. 99-116.
http://dx.doi.org/10.1016/j.earscirev.2008.11.004
4. McCall, G. J. H., in press, The Carbonado diamond conundrum Earth-Science Reviews, In Press, Accepted Manuscript, Available online 13 February 2009. doi:10.1016/j.earscirev.2009.01.002
http://dx.doi.org/10.1016/j.earscirev.2009.01.002
"The reviewer presents the results of a literature search on the enigmatic occurrences of carbonado; a form (but not the only form) of polycrystalline diamond, which is mined for industrial diamonds." He hypothesizes that "carbonado does stem from terrestrial eruptive processes" and concludes that much research remainsto be performed before any conclusions can be reached.5. Schmieder, M., and E. Buchner, 2007, Short note: The Fayabasin (N Chad, Africa) – A possible impact structure? Journal of African Earth Sciences. vol. 47, pp. 62–68.The Faya basin is an almost circular structure, centered on 18º 10' N and 19º 34' E. It lies about 55 km ENE of the city of Faya (Largeau) and has a diameter of about 2 km.
"http://dx.doi.org/10.1016/j.jafrearsci.2006.11.004http://adsabs.harvard.edu/abs/2007JAfES..47...62S
Source: Paul V. Heinrich, Baton Rouge, LA, USA
01 February 2009
Libyan Desert Glass
Libyan Desert Glass with natural hole ~2kg FOR SALE (click on photo for larger view)- photo by Dirk Ross
Ramirez-Cardona, M., A. El-Barkooky, M. Hamdan, K. Flores-Castro, N. I. Jimenez-Martinez, and M. Mendoza-Espinosa, 2008, On the Libyan Desert Silica Glass (LDSG) transport model from a hypothetical impact structure. PIS-01 General contributions to impact structures, International Geological Congress Oslo 2008, Oslo, Norway.
"Fragments of this glass are mostly scattered upon the exposed bedrock of Nubia group (Cretaceous sandstone), on a large surface area along wide corridors between dunes of the Great Sand Sea (SW of Egypt). This distribution is somewhat the result of the tektite fluvial transport occurring throughout the Oligocene-Miocene boundary."
PIS-01 General contributions to impact structures
International Geological Congress Oslo 2008
Source: Paul Heinrich, LA, USA
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