Coal ball: Difference between revisions

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* {{cite journal | title= Formation and distribution of coal balls in the Herrin Coal (Pennsylvanian), Franklin County, Illinois Basin, USA|last=Demaris|first=Phillip J. |journal=[[Journal of the Geological Society]] | date = January 2000|volume = 157 |issue=1| pages = 221–228| doi = 10.1144/jgs.157.1.221|bibcode=2000JGSoc.157..221D|s2cid=129037655}}
* {{cite journal|title=An Example of the Origin of Coal-Balls|journal=Proceedings of the Geologists' Association|volume=72|issue=4|last1=Evans|first1=W. D.|last2=Amos|first2=Dewey H.|date=February 1961|doi=10.1016/S0016-7878(61)80038-2|pages=445 }}
* {{cite journal |last=Feliciano |first=José Maria |title=The Relation of Concretions to Coal Seams |journal=The Journal of Geology |date=1 May 1924 |volume=32 |issue=3 |doi=10.1086/623086 |pages=230–239 |bibcode=1924JG.....32..230F |jstor=30059936|s2cid=128663837 }}
* {{cite journal | title = Making Coal Ball Peels to Study Fossil Plants | journal = The American Biology Teacher | date = February 1986 | first1 = Mark L. | last1 = Gabel | last2=Dyche | first2= Steven E. | volume = 48 | issue = 2 | pages = 99–101| jstor=4448216| doi = 10.2307/4448216 }}
* {{cite journal|title=Coal-ball floras of the Namurian-Westphalian of Europe|last=Galtier|first=Jean|journal=Review of Palaeobotany and Palynology|volume=95|issue=1–4|pages=51–72|year=1997|doi=10.1016/S0034-6667(96)00027-9 }}
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* {{cite journal|last1=Mamay|first1=Sergius H.|last2=Yochelson|first2=Ellis L.|year=1962|title=Occurrence and significance of marine animal remains in American coal balls|journal=Shorter Contributions to General Geology|pages=193–224|id={{Google books|yCYlAQAAIAAJ|Geological Survey Professional Paper, Volume 354}}}}
* {{cite journal|url=http://library.isgs.uiuc.edu/Pubs/pdfs/circulars/c530.pdf|title=Geologic disturbances in Illinois coal seams|publisher=Illinois State Geological Survey|volume=530|first=W. John|last=Nelson|year=1983|access-date=19 January 2012|archive-url=https://web.archive.org/web/20120417075834/http://library.isgs.uiuc.edu/Pubs/pdfs/circulars/c530.pdf|archive-date=17 April 2012|url-status=dead}}
* {{cite journal | title = A Paleozoic Angiosperm | journal = The Journal of Geology | date = June 1923b | first = Adolph C. | last = Noé | volume = 31 | issue = 4 | pages = 344–347| jstor = 30078443 | doi = 10.1086/623025 | bibcode = 1923JG.....31..344N| s2cid = 129159972 }}
* {{cite journal | title = Coal Balls | journal = [[Science (journal)|Science]] | date = 30 March 1923a | first = Adolph C. | last = Noé | volume = 57 | issue = 1474 | pages = 385| jstor=1648633 | pmid=17748916 | doi=10.1126/science.57.1474.385|bibcode = 1923Sci....57..385N }}
* {{cite web|url=http://kuscholarworks.ku.edu/dspace/bitstream/1808/3746/3/paleo.paper.082op.pdf|title=Textures and Conditions of Formation of Middle Pennsylvanian Coal Balls, Central United States|last=Perkins|first=Thomas|year=1976|publisher=[[University of Kansas]]|access-date=16 July 2011}}