If this is what I think it is, it's very cool, and also moderately well documented and reasonably well known (at least in some circles).
If I haven't got this mixed up with something else, this is the event which is believed (by some) to have "reset" the carbon 14 clocks in a lot of material in North America, making C14 dates dubious at best for a lot of Native American artifacts. (However, please note, this doesn't do the Young Earthers any good -- the C14 dates which were bashed all read *younger* than they should. IOW things may be older than they appear.) On 02/01/2010 05:59 PM, Rich Murray wrote: > holocene Clovis culture impact disaster? expert Vance T Holliday talk > 5:30 pm Monday Feb 1 $ 12 at Hotel Santa Fe, Paseo de Peralta at > Cerrillos Road -- many impact air bursts near Odessa crater: Rich Murray > 2010.02.01 > http://rmforall.blogspot.com/2010_02_01_archive.htm > Monday, February 1, 2010 > http://groups.yahoo.com/group/astrodeep/message/39 > _____________________________________________________ > > [ Note: Third Meteor Night, 7 pm Tuesday Feb 2, SF Complex ] > > > http://www.southwestseminars.org/SouthwestSeminars.org/Ancient_Sites_2010.html > 466-2775 > > http://www.argonaut.arizona.edu/holliday.htm > > http://www.argonaut.arizona.edu/history.htm > > http://www.sott.net/articles/show/198948-Absence-of-Evidence-for-a-Meteorite-Impact-Event-13-000-Years-Ago > > http://www.pnas.org/content/106/51/21505 free full text > > François S. Paquay, Greg Ravizza, Steven Goderis, Philippe Claeys, > Steven Goderis, Frank Vanhaeck, Matthew Boyd, Todd A. Surovell, > Vance T. Holliday, C. Vance Haynes, Jr. > "Absence of geochemical evidence for an impact event at the > Bolling - Allerod/Younger Dryas transition." > Proceedings of the National Academy of Sciences, 2009 > presented at the American Geophysical Union Fall 2009 Meeting > in San Francisco. Wednesday December 16th, 2:52 PM -- 3:04 PM, > Room 2006 Moscone West > > > > Just now, on Google Earth I found: > > 31.7126 -102.5230 .933 km el SW of Odessa crater > many small shallow white and dark craters nearby > > 31.5932 -102.4573 .837 km el 15 km field of white deposits in > oil field -- near surface Holocene air bursts of ice comet fragments? > > 31.2119 -102.3476 .722 km el > 25 km size air burst? > > 31.3667 -102.6734 .731 km el > 7 km air burst? > > 31.4865 -102.6612 .777 km el > 5 km air burst? > South end of a long string of many large fields > > 31.6338 -102.8652 .826 km el > > 31.9087 -102.9922 .900 km el > > > http://en.wikipedia.org/wiki/Odessa_Meteor_Crater > > The Odessa Meteor Crater is a meteorite crater in the southwestern > part of Ector County, southwest of the city of Odessa, Texas, > United States. > It is located approximately 3 miles (5 km) south of I-20 at > FM 1936 south.[1] > This is one of two impact crater sites found in Texas, > the other being the much larger and older Sierra Madera crater. > > The Handbook of Texas Online describes the Odessa meteor > crater as the largest of several smaller craters in the immediate > area that were formed by the impact of thousands of octahedrites > (an iron metallic type) that fell in prehistoric times.[2] > > The web site of the University of Texas of the Permian Basin > (UTPB, Center for Energy and Economic Diversification [CEED]), > identifies five craters at the Odessa site and shows a distribution > map of the meteorite fragments recovered from the area.[3] > > The recoveries have generally come from an area to the north and > northwest of the main crater site, with only a few found to the south. > They indicate that the structure of the main crater, because it was > one of the earliest to be recognized and studied, is now used to > name similar impact sites on a worldwide basis. > Over 1500 meteorites have been recovered from the surrounding > area over the years, the largest of which weighed approximately > 300 pounds (135 kg), but excavations in the main crater confirm that > there is no meteorite mass underground and probably never has been. > The site has been designated as a National Natural Landmark by the > National Park Service, and a small information area and nature trail > has been set up on-site for a self-guided tour. > It is 168 meters (~550 feet) in diameter and the age is estimated > to be around 63,500 years (Pleistocene or younger).[4] > The crater is exposed to the surface, and was originally about > 100 feet (30 meters) deep. > Due to subsequent infilling by soil and debris, the crater is currently > 15 feet (5 meters) deep at its lowest point, which provides enough > relief to be visible over the surrounding plains, but does not offer the > dramatic relief found at the more famous Meteor Crater in Arizona. > Still, the site offers an excellent opportunity to view a relatively > uncommon impact feature close to a major transportation artery > near a major city. > > References > > 1. "Odessa". Earth Impact Database. University of New Brunswick. > Retrieved 2008-12-30. > http://en.wikipedia.org/wiki/Earth_Impact_Database > > 2. Smith, Julia Cauble. "Meteor crater at Odessa". > Handbook of Texas Online. Retrieved 5 November 2009. > http://www.tshaonline.org/handbook/online/articles/MM/rym1.html > http://www.lpi.usra.edu/meetings/lpsc2006/pdf/2372.pdf > > 3. Anonymous. "Meteor Impact Structures". > Center for Energy & Economic Diversification, > The University of Texas of the Permian Basin. > Retrieved 5 November 2009. > http://ceed.utpb.edu/geology-resources/west-texas-geology/meteor-impact-structures/ > > 4. Holliday, V.T., Kring, D.A., Mayer, J.H. and Goble, R.J. 2005. > Age and effects of the Odessa meteorite impact, > western Texas, USA. Geology 33(12):945-948. > > > http://www.netwest.com/virtdomains/meteorcrater/history.htm > > "The shower was composed of many thousands of individual > meteorites of various sizes which fell over an area of about > 2 square miles. > The smaller meteorites, which were by far the most numerous, > either came to rest on the earth's surface or at the bottom of > shallow impact pits within the soil. > There were several very large meteoric masses in the shower, > however, and these struck the earth with such enormous energy > that they penetrated deeply into bedrock producing craters > in the earth at the places of impact. > > When freshly formed, the craters were funnel-shaped depressions, > the largest about 550 feet in diameter and 100 feet in depth. > More than 100,000 cubic yards of crashed rock as ejected > from this crater by the energy released from the impacting > meteoric mass. [ about a cube of 300 m on each edge ] > Smaller craters in the vicinity of the main crater range form > 15 feet to 70 feet in diameter and from 7 feet to 18 feet in depth. > > In the ages following their formation the craters gradually > accumulated sediments deposited by wind and water. > The main crater was eventually filled to within 6 feet > of the level of the surrounding plain. > It now appears a shallow, nearly circular depression > surrounded by a low, rock-buttressed rim. > The several smaller associated craters were so completely buried > that their existence was not suspected until they were exploded in > excavations made by the University of Texas, in the early 1940's." > > > http://en.wikipedia.org/wiki/Impact_Field_Studies_Group > > http://en.wikipedia.org/wiki/Earth_Impact_Database > Suspected Earth Impact Sites (SEIS) > ...the Suspected Earth Impact Sites database has been > updated, expanded, renamed and relocated. > The main changes/additions include: > -- new name: Impact database v.2009.1 > -- new location and website design: > http://impacts.rajmon.cz > > > http://astrobiology.nasa.gov/nai/library-of-resources/annual-reports/2006/uh/projects/terrestrial-analog-study-sierra-madera-impact-structure-texas/ > > Terrestrial analog study: Sierra Madera impact structure, Texas > Project Investigators: Karen Stockstill > 30.6 N 102.9 W > > Other Project Members > F. Scott Anderson (Co-Investigator) > Victoria Hamilton (Collaborator) > Astrobiology Roadmap Objectives: > > Objective 1: Determine whether the atmosphere of the early Earth, > hydrothermal or exogenous matter were significant sources > of organic matter. > Objective 4: Expand and interpret the genomic database of a > select group of key microorganisms in order to reveal the history > and dynamics of evolution. > > Project Progress > > Sierra Madera impact crater is 12 km in diameter (Fig. 1) > and is a well-exposed remnant of a complex impact crater, > which contains impact-generated breccias (disrupted rock with > sharp-angled fragments cemented in a fine matrix) > and shatter cones (a cone-shaped fracture pattern found in > rocks that have been exposed to a sudden release of energy, > such as an impact) (Wilshire et al., 1972; Huson, 2006). > Marine carbonates and lesser amounts of interbedded > siliciclastic rocks were impacted, making Sierra Madera > an ideal place to study the effects of shock metamorphism > in carbonates and sedimentary rocks (Huson, 2006). > Understanding how impact-induced shock affects the > thermal infrared spectrum is very relevant to thermal > infrared studies of Mars (e.g., Stockstill et al., 2005), > where impact cratering has been an important process > in re-working the surface materials (Strom et al., 1992). > Samples exhibiting impact deformation features were > collected from the central peak area of Sierra Madera (Fig. 2), > including monolithic breccias, mixed breccias and shatter cones. > In addition, carbonate rocks were collected from one of the rim > locations in order to compare carbonates that have experienced > variable degrees of shock deformation and its effect on the > thermal infrared spectrum. > Thermal emissions spectra of these samples will be collected to > evaluate the effect of impacts on the spectral absorptions seen > in the thermal IR. > > Figure 1. Digital Elevation Model (DEM) of Sierra Madera > impact structure showing central uplift and approximate location > of the raised rim (red outline). > DEM compiled by Matthews from four 7.5’ quadrangles > (CEED image, Texas) and acquired from the Earth Impact Database > http://www.unb.ca/passc/ImpactDatabase/images/sierra-madera.htm > > Figure 2. Photograph of Sierra Madera central peak taken from a > road cut through the NE crater rim. > Samples of impact-generated breccias and shatter cones were > collected from the central peak. > Samples of the crater rim were collected from another rim location. > > Name > Impact Field Studies Group annual field trip > Dates > March 11, 2006 - March 12, 2006 > Location > 30.6 N 102.9 W > Description > Sample collection of impact-derived breccias and shatter cones. > _____________________________________________________ > > > third Meteor Night, 7 pm Tuesday Feb 2, SF Complex -- soon I will > show Tim McElvain 3 sites in La Tierra-Las Dos subdivision, > Santa Fe, NM -- my samples show intense blast effects with surface > melting and mineral coatings: Rich Murray 2010.01.28 > http://rmforall.blogspot.com/2010_01_01_archive.htm > Thursday, January 28, 2010 > http://groups.yahoo.com/group/astrodeep/message/38 > > large dense fractal meteor cluster in Alaska? also 21 pages re > unusual 0.6 m rock in Palmer: Horace Heffner: > Rich Murray 2010.01.24 > http://rmforall.blogspot.com/2010_01_01_archive.htm > Sunday, January 24, 2010 > http://groups.yahoo.com/group/astrodeep/message/37 > > Meteor Night 7 pm tonight, Santa Fe Complex, Santa Fe, Jan 19, > Rich Murray with 10x12 screen on two extensive websites by > Dennis Cox and by Tim McElvain: Rich Murray 2010.01.19 > http://rmforall.blogspot.com/2010_01_01_archive.htm > Tuesday, January 19, 2010 > http://groups.yahoo.com/group/astrodeep/message/36 > > http://sites.google.com/site/dragonstormproject/ > Dennis Cox, Fresno, California > > http://www.impactstructure.net/working-hypothesis.html > Thornton H. "Tim" McElvain, Santa Fe, New Mexico > > awesome evidence (Google Earth images, stereo pairs, some videos) > from Mexico to Canada for 500 km comet rubble pile air impacts > 12950 BP -- Dennis Cox: Rich Murray 2010.01.13 > http://rmforall.blogspot.com/2010_01_01_archive.htm > Wednesday, January 13, 2010 > http://groups.yahoo.com/group/astrodeep/message/35 > > exact Carolina Bay crater locations, RB Firestone, A West, et al, > two YD reviews, 2008 June, 2009 Nov, > also 3 upcoming abstracts: Rich Murray 2009.11.14 > http://rmforall.blogspot.com/2009_11_01_archive.htm > Saturday, November 14, 2009 > http://groups.yahoo.com/group/astrodeep/message/31 > > Rich Murray, MA > Boston University Graduate School 1967 psychology, > BS MIT 1964, history and physics, > 1943 Otowi Road, Santa Fe, New Mexico 87505 > 505-501-2298 [email protected] > > http://groups.yahoo.com/group/AstroDeep/messages > > http://RMForAll.blogspot.com new primary archive > > http://groups.yahoo.com/group/aspartameNM/messages > group with 142 members, 1,588 posts in a public archive > > http://groups.yahoo.com/group/rmforall/messages > > participant, Santa Fe Complex www.sfcomplex.org > _____________________________________________________
