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J/A+A/321/L33 Terrestrial impact cratering rate (Jetsu 1997)
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The "human" statistics of terrestrial impact cratering rate
Jetsu L.
<Astron. Astrophys. 321, L33 (1997)>
=1997A&A...321L..33J (SIMBAD/NED BibCode)
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ADC_Keywords: Earth
Keywords: Solar system: Earth - Comets, Techniques: statistical,
Galaxy: solar neighbourhood
Abstract:
The most significant periodicities in the terrestrial impact crater
record are due to the "human-signal": the bias of assigning integer
values for the crater ages. This bias seems to have eluded the
proponents and opponents of real periodicity in the occurrence of
these events, as well as the theorists searching for an
extraterrestrial explanation for such periodicity. The
"human-signal" should be seriously considered by scientists in
astronomy, geology and paleontology when searching for a connection
between terrestrial major comet or asteroid impacts and mass
extinctions of species.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 125 74 Ages of the impact craters
table1.tex 79 343 LaTeX version of table1
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Sequential number
4- 24 A21 --- Name Crater name
26- 40 A15 --- Country Country
42- 49 F8.3 Myr t Age of the impact crater
51- 58 F8.4 Myr e_t rms uncertainty on age
60- 68 A9 Myr et1/et2 (e_t1/e_t2) for combined events
70- 76 F7.3 km Diam Diameter
78- 86 A9 km D1/D2 (D1/D2) for combined events
88-110 A23 --- Loc Location for combined events
112 A1 --- C1 [Y] Y: in the C1 sample
114 A1 --- C2 [Y] Y: in the C2 sample
116 A1 --- C3 [Y] Y: in the C3 sample
118 A1 --- C4 [Y] Y: in the C4 sample
120 A1 --- C5 [Y] Y: in the C5 sample
122 A1 --- C6 [Y] Y: in the C6 sample
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Acknowledgements: Lauri J. Jetsu <jetsu@norsg1.nordita.dk>
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(End) Patricia Bauer [CDS] 23-May-1997