. Additional notes on the Grinnell ice-cap. Ice -- Nunavut Baffin Island. The Navajo Meteorite 125 certainty that all pre-existing Neumann lines, if there had been any, were obliterated during reheating. The present Neumann lines, therefore, in all probability, were formed subsequent to reheating. The question now arises if they were formed before or after the meteor entered the earth's atmosphere. There is, of course, no proof that. Fig. 53. Rhabdites and schreibersite inclusions of varying shape and size (area from fig. 48, D). Ends of many of these bodies are notched. Neutral sodium picrate
. Additional notes on the Grinnell ice-cap. Ice -- Nunavut Baffin Island. The Navajo Meteorite 125 certainty that all pre-existing Neumann lines, if there had been any, were obliterated during reheating. The present Neumann lines, therefore, in all probability, were formed subsequent to reheating. The question now arises if they were formed before or after the meteor entered the earth's atmosphere. There is, of course, no proof that. Fig. 53. Rhabdites and schreibersite inclusions of varying shape and size (area from fig. 48, D). Ends of many of these bodies are notched. Neutral sodium picrate, 5 minutes. X19. they were not formed cosmically subsequent to reheating. But there is good circumstantial evidence suggesting that they were formed during the meteor's flight to the earth. The meteorite was found in two masses, indicating that the original body was disrupted. Furthermore, one of the masses was deeply fissured. Both of these occurrences—the disruption and the production of deep fissures— are conclusive proof that the meteor during its flight encountered severe air pressure and resulting disruptive stresses. Since Neumann lines have been produced in the laboratory by subjecting artificial irons to violent shock and extensional stresses (Foley and Howell, 1923; Foley and Crawshaw, 1926), there would seem to be reason for supposing that the Neumann lines in the present meteorite were. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Roy, Sharat Kumar, 1897-1962. Chicago : Field Museum of Natural History
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