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THE JOURNAL OF GEOLOGY.

Correlation table of the Coal Measures of Arkansas with the Pacific Carboniferous Province.
		Arkansas.	Indian Territory		Texas				Mississippi Valley	Pennsylvania		China and other parts of Asia		Russia and Ural Mts.		India		South America
PERMIAN					$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	Wichita Series, with Medlicottia, Popanoceras Waagenoceras, etc.			Permo- Carboniferous of Kansas and Nebraska	Upper Barren Coal-Measures						Productus Limestones
														Kostroma Permian		$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	Speck Sandstone Series
			Permo- Carboniferous		Cisco	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	Popanoceras parkeri Beds					Bokhara Cephalopod Beds		Artinsk Stage			Speck Sandstone Series	Itaitúba Beds
COAL-MEASURES OR PENNSYLVANIAN	Upper Coal-Measures	Poteau Mountain Marine Beds	Productive Coal-Measures	Pawhuski Limestone					Upper Coal- Measures	Upp. Prod. Coal Meas.	Wyoming Valley Limestones	Marine Beds of Lo-ping		North. Russ. Nova Zembla		Spiti Limestones		Plant Beds
		Van Buren Plant Beds										$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	Productive Coal-Measures of China	$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	Upper Carboniferous Limestone
		Fort Smith Marine Beds
		Ouita Coal Horizon with Plants
		Boles, Scott County, Beds with Goniatites marianus and Pronorites								Lower Barren Coal-Meas.
	Lower Coal-Measures	Morrillton Marine Beds				Strawn and Canyon	Divisions	$\scriptstyle {\left\{{\begin{matrix}\ \\\\\ \\\ \\\ \\\ \\\ \\\ \\\ \\\ \ \end{matrix}}\right.}$	Lower Coal- Measures	Lower Barren Coal-Meas.						Muth Quartzites
		Morrillton Marine Beds								Lower Productive Coal-Meas.
		Conway County Millstone Grit, with Marine Fossils
		Big Rock, Pulaski County, Plant Beds
		El Paso, White County, Plant Beds												$\scriptstyle {\left.{\begin{matrix}\ \\\\\ \\\ \\\ \ \end{matrix}}\right\}\,}$	Middle Carboniferous Limestone	Limestones
		Searcy, Bee Rock, Marine Beds								Pottsville Conglomerate
		Searcy, Bee Rock, Plant Beds								Pottsville Conglomerate
LOWER CARBONIFEROUS OR MISSISSIPPIAN		Lower Carboniferous Limestone	Lower Carboniferous Limestone		Bend Division				Lower Carboniferous Limestone	Mauch Chunk Series		Lower Carboniferous Limestone		Lower Carboniferous Limestone		Crinoidal