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August 7, 2020, 6:07 pm UTC    
September 06, 2019 08:41PM
The paper is:

Estes, M.B., Ritterbush, L.W. and Nicolaysen, K., 2010. Clinker,
pumice, scoria, or paralava? Vesicular artifacts of the lower
Missouri basin. Plains Anthropologist, 55(213), pp.67-81.

Related publications are:

John Bluemle,, 2015.6-North Dakota's Fire-Formed Rocks
Published May 20, 2015 | By [johnbluemle.com]

Gonzalez, M.A., 2009. Badlands of the Northern Great Plains:
Hell with the Fires Out. In Geomorphological Landscapes of the
World (pp. 29-38). Springer, Dordrecht.

Heffern, E.L. and Coates, D.A., 2004. Geologic history of natural coal-bed
fires, Powder River basin, USA. International Journal of Coal Geology, 59(1-2), pp.25-47.

Quintero, J.A., Candela, S.A., Ríos, C.A., Montes, C. and Uribe,
C., 2009. Spontaneous combustion of the upper paleocene
cerrejón formation coal and generation of clinker in la guajira
peninsula (Caribbean region of Colombia). International Journal
of Coal Geology, 80(3-4), pp.196-210.


Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)
Subject Author Posted

Artifacts and North Dakota's Fire-Formed Rocks

Paul H. September 06, 2019 08:41PM

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