File:Black mat (12.9 ka) Murray Springs Clovis site in Arizona.jpg

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Black_mat_(12.9_ka)_Murray_Springs_Clovis_site_in_Arizona.jpg(600 × 402 pixels, file size: 85 KB, MIME type: image/jpeg)

Summary[edit | edit source]

Description

The dark line shown is the black mat (12.9 ka) along the arroyo wall of the Murray Springs Clovis site in Arizona.

Source

The image appears on a website entitled, "Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling" at https://www.pnas.org/content/104/41/16016.full.

Date

March 13, 2007

Author

R. B. Firestone, A. West, J. P. Kennett, L. Becker, T. E. Bunch, Z. S. Revay, P. H. Schultz, T. Belgya, D. J. Kennett, J. M. Erlandson, O. J. Dickenson, A. C. Goodyear, R. S. Harris, G. A. Howard, J. B. Kloosterman, P. Lechler, P. A. Mayewski, J. Montgomery, R. Poreda, T. Darrah, S. S. Que Hee, A. R. Smith, A. Stich, W. Topping, J. H. Wittke, and W. S. Wolbach

Rationale

No free licensed or public domain alternatives known to exist to show the black mat (12.9 ka) along the arroyo wall of the Murray Springs Clovis site in Arizona.

Permission

Fair Use, site restriction.

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File history

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Date/TimeThumbnailDimensionsUserComment
current15:10, 23 April 2019Thumbnail for version as of 15:10, 23 April 2019600 × 402 (85 KB)Marshallsumter (discuss | contribs){{Information1 |Description = The dark line shown is the black mat (12.9 ka) along the arroyo wall of the Murray Springs Clovis site in Arizona. |Source = The image appears on a website entitled, "Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling" at https://www.pnas.org/content/104/41/16016.full. |Date = March 13, 2007 |Author = R. B. Firestone, A. West, J. P. Kennett, L. Becker, T. E. Bunch, Z. S. Revay, P....