Re: [meteorite-list] Changes In 14C and Impacts
Sterling, There is a bit (with references) about the astrobleme theory for the Nastapoka Arc here... https://en.wikipedia.org/wiki/Nastapoka_arc Consensus seems to be no evidence. Possible tectonic origin. John Hendry On 29/06/2015 10:07, Sterling K. Webb via Meteorite-list meteorite-list@meteoritecentral.com wrote: Paul, Ed, List, The village is actually named Kitscoty. https://en.wikipedia.org/wiki/Kitscoty Kitscoty is named after a village in Kent (U.K.) with a famous stone megalithic structure, so while Googling for a Kitscoty Structure you have to distinguish which Kitscoty and what kind of structure is meant. http://albertacommunityprofiles.com/Profile/Kitscoty/2 The structure referred to is a proposed rebound plateau of an impact south of Kitscoty, Alberta, Canada: http://www.meridianbooster.com/2009/03/18/did-a-massive-meteor-touch-down- he re I don't know (and am not going to Google myself to death finding out), but I recall that Hudson Bay and the Canadian Shield is very old crust, at least 2.0 to 2.5 billion years old. It is bound to have evidence of a great many impacts in that long time span, but most, of ancient age. Plus, the Canadian Shield has been scoured by every ice age for billions of years, over and over and over again. Only evidences that can survive that will be found. With typical human short-sightedness, most theories of any explanation of a feature in Northern Canada are always referred to the last Ice Age, which is only the last few million years, while the Shield is immensely more ancient and has been exposed for BILLIONS of years. Northern Canada contains a great many craters; see: http://www.thelivingmoon.com/43ancients/02files/Earth_Images_09.html#Steen I can suggest another very ancient crater: the south-southeastern coast of Hudson Bay, above James Bay is a portion of a perfect circle and it has a nice cluster of islands at the geometric center of that circle like the remnants of central peaks. I've always thought that it could be what's left of a very, very ancient astrobleme. See map at: http://www.worldatlas.com/aatlas/infopage/hudsonbay.htm It's very suggestive. But evidence? I know of none. Sterling Webb -- -Original Message- From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of E.P. Grondine via Meteorite-list Sent: Sunday, June 28, 2015 10:53 AM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Changes In 14C and Impacts Hi Paul - Thanks for the link to that paper. I am looking forward to your comments on the Kiscoty structure. My guess is that the depth of the ice sheet may be estimated from the height of the rebound, but I am incapable of performing detailed calculations from any formula you may know of. My working assumption is that nearly all of the energy released from the initial blast went into different processes which melted the ice sheet - such as the infra-red, the boiling water returning to Earth, the hot impact dust returning, etc. E.P. Grondine Man and Impact in the Americas __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Changes In 14C and Impacts
Paul, Ed, List, The village is actually named Kitscoty. https://en.wikipedia.org/wiki/Kitscoty Kitscoty is named after a village in Kent (U.K.) with a famous stone megalithic structure, so while Googling for a Kitscoty Structure you have to distinguish which Kitscoty and what kind of structure is meant. http://albertacommunityprofiles.com/Profile/Kitscoty/2 The structure referred to is a proposed rebound plateau of an impact south of Kitscoty, Alberta, Canada: http://www.meridianbooster.com/2009/03/18/did-a-massive-meteor-touch-down-he re I don't know (and am not going to Google myself to death finding out), but I recall that Hudson Bay and the Canadian Shield is very old crust, at least 2.0 to 2.5 billion years old. It is bound to have evidence of a great many impacts in that long time span, but most, of ancient age. Plus, the Canadian Shield has been scoured by every ice age for billions of years, over and over and over again. Only evidences that can survive that will be found. With typical human short-sightedness, most theories of any explanation of a feature in Northern Canada are always referred to the last Ice Age, which is only the last few million years, while the Shield is immensely more ancient and has been exposed for BILLIONS of years. Northern Canada contains a great many craters; see: http://www.thelivingmoon.com/43ancients/02files/Earth_Images_09.html#Steen I can suggest another very ancient crater: the south-southeastern coast of Hudson Bay, above James Bay is a portion of a perfect circle and it has a nice cluster of islands at the geometric center of that circle like the remnants of central peaks. I've always thought that it could be what's left of a very, very ancient astrobleme. See map at: http://www.worldatlas.com/aatlas/infopage/hudsonbay.htm It's very suggestive. But evidence? I know of none. Sterling Webb -- -Original Message- From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of E.P. Grondine via Meteorite-list Sent: Sunday, June 28, 2015 10:53 AM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Changes In 14C and Impacts Hi Paul - Thanks for the link to that paper. I am looking forward to your comments on the Kiscoty structure. My guess is that the depth of the ice sheet may be estimated from the height of the rebound, but I am incapable of performing detailed calculations from any formula you may know of. My working assumption is that nearly all of the energy released from the initial blast went into different processes which melted the ice sheet - such as the infra-red, the boiling water returning to Earth, the hot impact dust returning, etc. E.P. Grondine Man and Impact in the Americas __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] FWD: Re: differentiated asteroids and stony-iron meteorite
-- Forwarded message -- From: ALAN RUBIN aeru...@ucla.edu To: Francesco Moser coj...@tiscali.it Cc: Meteoritecentral List Meteorite-list@meteoritecentral.com Date: Sun, 28 Jun 2015 13:25:56 -0700 Subject: Re: [meteorite-list] differentiated asteroids and stony-iron meteorite The principal paradigm is that the pallasites are from the core-mantle boundary of a differentiated asteroid and that magmatic irons (those group[s whose elemental ratios are consistent with formation by fractional crystallization) are from the core. There are non-magmatic irons (the IAB complex and the IIE irons) with more-controversial origins. I think that they are impact products from the surface of chondritic asteroids. The origin of mesosiderites is also controversial, but it seems to me that they are probably impact products formed when the core )or core plus mantle) of one differentiated asteroid fragment collided with the basaltic crust of another. Alan Rubin __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Breaking News Story - GA AL TN FL NC Major Meteor? Event Apprx. 0130 EDT / 0030 Central
This was the re-entry of 1973-084D / 6939, which was seen from the southeastern U.S.A. on 2015 Jun 29 near 05:30 UTC (01:30 EDT). It was the Blok-L stage of the Cosmos 606 launch. Empty mass 1160 kg. Additional information is in my post to SeeSat-L: http://satobs.org/seesat/Jun-2015/0224.html Ted Molczan __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Changes In 14C and Impacts
Hi Sterling, Paul, List - Re: Date of Kitscoty structure Since there have been many ice ages, it seems to me that if the Kitscoty structure was more ancient than the most recent ice age, it would have been scoured away. Hence the timing of its formation would seem to agree with the documented water releases. Please remember that this may have been the first impact of a piece of Comet Giacobinni-Zimmer. The 10,850 BCE impacts were likely to have been the second impacts of pieces of this comet. But refining these dates and aligning them with cometary dynamic orbital models is well beyond my current computational abilities. Re: Changes in 14C and impact If I remember correctly, it was a leading Chinese nuclear physicist (unidentified by name in the paper) who first discussed the production of 14C in comets. Comet composition may be one factor in the 14 C loading. But if we look at the InCal charts, we can see a dramatic change in 14C associated with the Meteor Crater impact, which we know was produced by he impact of an iron asteroid. Hence my hypothesis that in hyper-velocity impacts, some of the photons reach gamma ray energy levels and release neutrons. If this is so, then the area around Meteor Crater may show or may not show some unusual isotopes, depending on their half-lives. good hunting, everyone E.P. Grondine Man and Impact in the Americas On Mon, 6/29/15, Sterling K. Webb sterling_k_w...@sbcglobal.net wrote: Subject: RE: [meteorite-list] Changes In 14C and Impacts To: meteorite-list@meteoritecentral.com Cc: 'E.P. Grondine' epgrond...@yahoo.com, 'Paul H.' inselb...@cox.net Date: Monday, June 29, 2015, 11:07 AM Paul, Ed, List, The village is actually named Kitscoty. https://en.wikipedia.org/wiki/Kitscoty Kitscoty is named after a village in Kent (U.K.) with a famous stone megalithic structure, so while Googling for a Kitscoty Structure you have to distinguish which Kitscoty and what kind of structure is meant. http://albertacommunityprofiles.com/Profile/Kitscoty/2 The structure referred to is a proposed rebound plateau of an impact south of Kitscoty, Alberta, Canada: http://www.meridianbooster.com/2009/03/18/did-a-massive-meteor-touch-down-he re I don't know (and am not going to Google myself to death finding out), but I recall that Hudson Bay and the Canadian Shield is very old crust, at least 2.0 to 2.5 billion years old. It is bound to have evidence of a great many impacts in that long time span, but most, of ancient age. Plus, the Canadian Shield has been scoured by every ice age for billions of years, over and over and over again. Only evidences that can survive that will be found. With typical human short-sightedness, most theories of any explanation of a feature in Northern Canada are always referred to the last Ice Age, which is only the last few million years, while the Shield is immensely more ancient and has been exposed for BILLIONS of years. Northern Canada contains a great many craters; see: http://www.thelivingmoon.com/43ancients/02files/Earth_Images_09.html#Steen I can suggest another very ancient crater: the south-southeastern coast of Hudson Bay, above James Bay is a portion of a perfect circle and it has a nice cluster of islands at the geometric center of that circle like the remnants of central peaks. I've always thought that it could be what's left of a very, very ancient astrobleme. See map at: http://www.worldatlas.com/aatlas/infopage/hudsonbay.htm It's very suggestive. But evidence? I know of none. Sterling Webb -- -Original Message- From: Meteorite-list [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of E.P. Grondine via Meteorite-list Sent: Sunday, June 28, 2015 10:53 AM To: meteorite-list@meteoritecentral.com Subject: [meteorite-list] Changes In 14C and Impacts Hi Paul - Thanks for the link to that paper. I am looking forward to your comments on the Kiscoty structure. My guess is that the depth of the ice sheet may be estimated from the height of the rebound, but I am incapable of performing detailed calculations from any formula you may know of. My working assumption is that nearly all of the energy released from the initial blast went into different processes which melted the ice sheet - such as the infra-red, the boiling water returning to Earth, the hot impact dust returning, etc. E.P. Grondine Man and Impact in the Americas __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com
Re: [meteorite-list] Licking, a meteorite from Missouri
Thanks to Dr Laurence Garvie, here's a proper photo of the Licking Specimen! http://www.mrmeteorite.com/ On Sat, Jun 27, 2015 at 11:20 PM, Ruben Garcia rubengarcia85...@gmail.com wrote: Hi all, I just purchased a new 8 kilo iron meteorite found near Licking, Missouri. I wasn't going to say much just yet but since someone already posted it on FB I figured I'd just post it here too. On Monday, Dr Laurence Garvie (ASU) will begin classification work on this medium octahedrite iron. I'd like to sell it intact but I may cut it and sell slices, not sure. See it here. http://www.mrmeteorite.com/newmissouriiron.htm -- Rock On! Ruben Garcia http://www.MrMeteorite.com -- Rock On! Ruben Garcia http://www.MrMeteorite.com __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Meteorite Picture of the Day
Today's Meteorite Picture of the Day: DAG 463 Contributed by: Wayne Harrigan http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/29/2015 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Breaking News Story - GA AL TN FL NC Major Meteor? Event Apprx. 0130 EDT / 0030 Central
List, Breaking News Story - GA AL TN FL NC Major Meteor? Event Apprx. 0130 EDT / 0030 Central 29JUN2015 -- Updates Pending, check back http://lunarmeteoritehunters.blogspot.jp/2015/06/breaking-news-ga-al-tn-fl-nc-major.html Dirk Ross...Tokyo The Latest Worldwide Meteor/Meteorite News http://lunarmeteoritehunters.blogspot.com/ __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Nastapoka Arc, Hudson Bay, Canada
__ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Nastapoka Arc, Hudson Bay, Canada - 2nd Try
In “Re: Changes in 14C and Impacts“ Sterling Webb wrote; I can suggest another very ancient crater: the south-southeastern coast of Hudson Bay, above James Bay is a portion of a perfect circle and it has a nice cluster of islands at the geometric center of that circle like the remnants of central peaks. I've always thought that it could be what's left of a very, very ancient astrobleme. The cluster of islands at the center of the Nastapoka Arc in Hudson Bay has at various times caught the attention of many a geologist, planetologist, and independent investigator and typically proved to be a major disappointment to many a stalker of extraterrestrial impact craters. They are the Beltcher Islands, which are an are an archipelago in Hudson Bay. Instead of consisting of older and highly brecciated and faulted strata that has been uplifted as part of a central uplift, they consist of younger, softer, tightly folded Proterozoic metasedimentary and metavolcanic rocks that overlie the eroded surface of the older, harder, Archean gneisses that outcrop eastward of the Nastapoka Arc. This Arc closely follows the unconformable contact between Archean Superior province gneisses and westward dipping early Proterozoic Belcher Group. The Belcher Islands are the exposed part of the Circum Ungava Fold Belt, which underlies the eastern edge of Hudson Bay. The fold belt consists of continental margins and a seaway that has been curshed between between two Archean landmasses during the Trans-Hudson Orogeny. Web pages: Belcher Islands https://en.wikipedia.org/wiki/Belcher_Islands Ricketts, B. D., and J. A. Donaldson, 1981, Sedimentary History of the Belcher Group of Hudson Bay. In Proterozoic Basins of Canada; Geological Survey of Canada, Paper 81-10, p. 235-254 http://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.websearch1=R=109371 http://ftp2.cits.rncan.gc.ca/pub/geott/ess_pubs/109/109385/pa_81_10.pdf Hynes, A., 1991, The gravity field of eastern Hudson Bay: Evidence for a flextural origin for the Hudson Bay (Nastapoka) Arc? Tectonics. Volume 10, Issue 4, Pages 722–728, August 1991 http://onlinelibrary.wiley.com/doi/10.1029/91TC00643/abstract Dietz, R.S., and J.P. Barringer (1973) Hudson Bay Arc as an Astrobleme: a Negative Search. Meteoritics. vol. 8, pp. 28–29. http://adsabs.harvard.edu/full/1973Metic...8...28D http://adsabs.harvard.edu/abs/1973Metic...8...28D Have you seen an Omar (Omarolluk erratic)? http://www.gov.mb.ca/iem/geo/surficial/omar_erratics.pdf Yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Changes In 14C and Impacts
Sterling K. Webb wrote: The village is actually named Kitscoty. https://en.wikipedia.org/wiki/Kitscoty Kitscoty is named after a village in Kent (U.K.) with a famous stone megalithic structure, so while Googling for a Kitscoty Structure you have to distinguish which Kitscoty and what kind of structure is meant. http://albertacommunityprofiles.com/Profile/Kitscoty/2 The structure referred to is a proposed rebound plateau of an impact south of Kitscoty, Alberta, Canada: http://www.meridianbooster.com/2009/03/18/did-a-massive-meteor-touch-down-here I found two geological maps that cover the area of this alleged structure. they are: Kitscoty, Alberta, 1942, A Series, 1:253,440 scale, Geological Map http://geogratis.gc.ca/api/en/nrcan-rncan/ess-sst/b59bdeb9-e941-5e83-a51b-2ab4c2f210c0.html http://ftp2.cits.rncan.gc.ca/pub/geott/ess_pubs/106/106804/gscmap-a_673a_e_1942_mn01.pdf Bedrock Geology of the Vermilion Area (NTS 73E), Map 570, 1:250,000 scale, Alberta Geological Survey http://www.ags.gov.ab.ca/publications/map/PDF/Map_570.pdf http://www.ags.gov.ab.ca/publications/abstracts/MAP_570.html http://www.ags.gov.ab.ca/publications/pubs.aspx?pkey=vermilion The Kitscoty, Alberta, 1942, A Series, geological Map shows that this alleged feature is neither circular nor even a structure. This map show only relatively flat lying Cretaceous sedimentary strata that lacks any significant structure to it. There are a couple of accurate geomorphic features. But neither of them form a circle. It does not look like there is anything significant about this feature. However, a nearby map that I came across shows what is called the Eagle Butte Astrobleme just west of the Cypress Hills, Alberta. The map is: Bedrock Geology of the Foremost Area (NTS 72E), Map 568, 1:250,000 scale, Alberta Geological Survey http://www.ags.gov.ab.ca/publications/abstracts/MAP_568.html http://www.ags.gov.ab.ca/publications/MAP/PDF/MAP_568.PDF The Cypress Hills, Canada https://en.wikipedia.org/wiki/Cypress_Hills_(Canada) Yours, Paul H. __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
[meteorite-list] Asteroid Day 2015
By Jareen Imam, CNN The first observation of Asteroid Day is on June 30, which is the day Tunguska was struck by an asteroid 107 years ago. The global event was created by astrophysicist Brian May, founding member and lead guitarist of the rock band Queen, and Lord Martin Rees, UK Astronomer Royal at the London Science Museum, to bring awareness and educate the world about asteroids http://www.cnn.com/2015/06/27/world/asteroid-day-declaration-irpt/index.html __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com https://pairlist3.pair.net/mailman/listinfo/meteorite-list
