5 edition of Tektites and their origin found in the catalog.
|Statement||John A. O"Keefe.|
|Series||Developments in petrology ;, 4|
|LC Classifications||QE399 .O425|
|The Physical Object|
|Pagination||xii, 254 p. :|
|Number of Pages||254|
|LC Control Number||81185822|
trial origin, discussions of tektites are usually included as a separate chapter in most books about meteorites. Even though tektites have been closely associated with stony and metallic meteorites, these “glassy meteorites” differ in some important respects. Their File Size: 4MB. Tektites (from Greek τεκτός tektos, molten) are natural glass rocks up to a few centimeters in size, which most scientists argue were formed by the impact of large meteorites on Earth's surface. Tektites are typically black or olive-green, and their shape varies from rounded to irregular. Tektites are among the "driest" rocks, with an average water content of %.
They have been treasured by those who found them, from modern aerodynamicists back to Stone Age hunters of the mastodon and the mammoth; interest in tektites is thousand of years older than interest in gold or silver. (John A. O´Keefe: in his book "Tektites and their origin"). Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.
Abstract— To improve the scarce data base of H2O content in tektites and impact glasses, we analyzed 26 tektites from all four strewn fields and 25 impact glass samples for their H2O content. The question of tektite origin has remained controversial since the days of the Apollo program. Tektites are small beads of glass found in large strewn fields on earth. Their origin is disputed, as to whether they are from lunar impacts, which find their way to earth or are debris from earth impacts.
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Additional Physical Format: Online version: O'Keefe, John Aloysius, Tektites and their origin. Amsterdam ; New York: Elsevier Scientific Pub. Co., Tektites and their origin (Developments in petrology) Hardcover – January 1, by John Aloysius O'Keefe (Author) › Visit Amazon's John Aloysius O'Keefe Page.
Find all the books, read about the author, and more. See search results for this author. Are you an author. Cited by: “Tektites, and their origin, have become one of the greatest scientific riddles of all time, yet books on Tektites are practically nonexistent.
Here is an up to date, simply written book that includes interviews with the leading Tektite authorities. "Tektites, and their origin, have become one of the greatest scientific riddles of all time, yet books on Tektites are practically nonexistent. Here is an up to date, simply written book that includes interviews with the leading Tektite authorities.
Though the meteorite impact theory of tektite formation is widely accepted, there has been considerable controversy about their origin in the past. As early asthe Dutch geologist Rogier Diederik Marius Verbeek (–) suggested an extraterrestrial origin for tektites: he.
This banner text can have markup. web; books; video; audio; software; images; Toggle navigation. Tektite, any of a class of small, natural glassy objects that are found only in certain areas of the Earth’s surface. The term is derived from the Greek word tēktos, meaning “melted,” or “molten.” Tektites have been the subject of intense scientific scrutiny throughout much of the 20th century owing to their unknown and possibly extraterrestrial origins, but they are now recognized.
TEKTITES AND THEIR ORIGIN. Amsterdam Netherlands: Elseveir Scientific Publishing. An encyclopedic compilation of information on tektites along with author’s own controversial hypothesis regarding their origin. pages.
Pushes lunar origin for tektites even though most scientists agree that Earth impacts are the more logical origin. The name tektite is derived from the Greek tektos, or melted.
These glassy objects have fascinated people of the world for centuries. The first known description of tektites comes from China around B.C., during the T’ang dynasty, in a book by Liu Sun, Ling Piao Lu Yi, loosely translated as “Notes on the Wonders Beyond the Nanling Mountains in Kwangtung”.
Title: Tektites and their origin: Authors: O'Keefe, John A. Publication: Developments in Petrology, Amsterdam: Elsevier, Publication Date: 00/ The leading theory concerning their origin is the "Meteorite Impact Theory".
It is postulated that many odd events occur during a meteor's impact because of the tremendous heat and pressure produced. Tektites may be fused glass that formed during an impact of a meteor with layers of rock on the Earth's surface. adshelp[at] The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A.
TEKTITES AND THE MOON John A. O'Keefe Theoretical Division, Goddard Space Flight Center National Aeronautics and Space Administration Tektites are small glassy objects with sizes of the order of an inch, and colored usually black and sometimes green or brown.
Book Review of Tektites and Their Origin by O'Keefe J. Physics of the Earth and Planetary Interiors. 15 (4): Rusakov V. S., Volovetsky M. V., Lukanin O. Mössbauer studies of natural glasses of impact and volcanic origin. mA () Tektites" Size Estimates of Their Source Craters and Implications for Their Origin RALPH B.
BALDWIN Oliver Machinery Company, Grand Rapids, Michigan Received Septem ; revised Janu From estimates of the total masses of tektites in three strewnfields, calculations by Orphal et al.
() of the amount of melt that could be ejected from Cited by: Darwin thought that australites were of volcanic origin due to their similarity to obsidian, volcanic glass. Later, australites were called blackfellows' buttons and obsidian bombs.
 One of the first scientists to seriously study australites was Charles Fenner, who saw his first australite in The four groups of tektites are now widely regarded as the product of splash from a meteoritic or cometary impact melt of terrestrial rock.
They include two groups (Moldavites and Ivory Coast tektites) attributed to the Nordlinger Ries and Bosumtwi craters. These craters seem unlikely to be of impact origin, though by: 4.
However, not all Tektites display these similarities. Therefore, their origin still remains a mystery to date. Formula:SiO 2 +Al 2 O 3 +Ca, Fe, Sr, Mg, Na, Ba.
Hardness: More than years ago, the Chinese people revered Tektite as a calligraphic pen of the Thunder god. Australian Aborigine tribes believed that Tektites bring good luck.
Povenmire, Hal, (), TEKTITES: A Cosmic Enigma, Hal Povenmire. Hal has just finished his new book which is much larger and more comprehensive with 4 times as many pictures as his earlier edition. $ plus $ postage/handling in the US. International orders. HUANGCHUAN (KWANGCHOWAN) (KWANG-CHOW WAN), HENAN PROVINCE, SOUTHERN CHINA.
TYPE: Tektite - Indochinite “CM” REF: P # FOUND: Known before A D According to J O’Keefe, in “Tektites and Their Origin”, P 3 (), tektites have been known from Southern China since about A Dwhen they were collected in the fields after sudden rainstorms in Leichow These Chinese tektites.
TEKTITE PEOPLE. These pages, which I'll gradually add to, will be dedicated to key people in the tektite world. Their stories, history and personality are often as fascinating as the tektites themselves. I'm going to try and tread carefully.
In the past there has been very heated conflicts between the lunar and terrestrial origin camps. Read Now ?book=Louis Varricchio's bold new book will demonstrate that there is much about the Moon's natural history that awaits discovery." - Dr.
John A. O'Keefe, former NASA space scientist and 4/5.