Evidence Suggesting a Meteorite Impact Origin for Lac Couture, Quebec.
نویسندگان
چکیده
منابع مشابه
Morphological Evidence for an Exclusively Inorganic Origin for Magnetite in Martian Meteorite Alh84001
IN MARTIAN METEORITE ALH84001. D. C. Golden, D. W. Ming*, R. V. Morris, A. J. Brearley, H. V. Lauer Jr., A. Treiman, M. E. Zolensky, C. S. Schwandt, G. E. Lofgren, and G. A. McKay, Hernandez Engineering Inc., Houston, TX; ARES, NASA Johnson Space Center, Houston, TX; Dept. of Earth & Planetary Sciences, Univ. of New Mexico, Albuquerque, NM, Lockheed Martin, Houston, TX; Lunar & Planetary Instit...
متن کاملMore Evidence for Multiple Meteorite Magmas
Cosmochemists have identified six main compositional types of magma that formed inside asteroids during the first 100 million years of Solar System history. These magmas vary in their chemical and mineralogical make up, but all have in common low concentrations of sodium and other volatile elements. Our low-sodium-magma diet has now changed. Two groups of researchers have identified a new type ...
متن کاملEvidence for the extraterrestrial origin of polycyclic aromatic hydrocarbons in the Martian meteorite ALH84001.
Possible sources of terrestrial contamination are considered for the observation of polycyclic aromatic hydrocarbons (PAHs) in the Martian meteorite ALH84001. Contamination is concluded to be negligible.
متن کاملPaleomagnetic evidence of a low-temperature origin of carbonate in the Martian meteorite ALH84001.
Indirect evidence for life on Mars has been reported from the study of meteorite ALH84001. The formation temperature of the carbonates is controversial; some estimates suggest 20 degrees to 80 degrees C, whereas others exceed 650 degrees C. Paleomagnetism can be used to distinguish between these possibilities because heating can remagnetize ferrimagnetic minerals. Study of two adjacent pyroxene...
متن کاملEvidence for Comet Storms in Meteorite Ages
Clustering of cosmic-ray exposure ages of H chondritic meteorites occurs at 7 ± 3 and 30 ± 6 Myr ago. There is independent evidence that comet storms have occurred at the same times, based on the fossil record of family and genus extinctions, impact craters and glass, and geomagnetic reversals. We suggest that H chondrites were formed by the impact of shower comets on asteroids. The duration of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1964
ISSN: 0004-6256
DOI: 10.1086/109417