. Bulletin. rom the coal from Zeigleiy III., representing mainly a portion of the dullcoal. between the two anthraxylon components 1—a and 5-a. Xote the lump-ins of the attritus and the cross section of rodlets at 2-d. PLATE XXIV. OPAQUE CROSS SECTIONS. A. An opaque, polished cross section (X10) of the coal from Zeigler, 111.,representing thin laminae composed of matter derived from the woody partsof plants alternating with matter derived largely from leaves. The dark stripsrepresent anthraxylon, and the light, delicate striations represent leaf cuticlesincluding an attritus largely derived fr
. Bulletin. rom the coal from Zeigleiy III., representing mainly a portion of the dullcoal. between the two anthraxylon components 1—a and 5-a. Xote the lump-ins of the attritus and the cross section of rodlets at 2-d. PLATE XXIV. OPAQUE CROSS SECTIONS. A. An opaque, polished cross section (X10) of the coal from Zeigler, 111.,representing thin laminae composed of matter derived from the woody partsof plants alternating with matter derived largely from leaves. The dark stripsrepresent anthraxylon, and the light, delicate striations represent leaf cuticlesincluding an attritus largely derived from leaf tissues. Similar lamina morehighly magnified, are shown in Plate XGVIII, .1 and B. B. An opaque, polished cross section from the Sesser coal (X10). showing•dull coal at 1-d and 3-d and anthraxylon at 2-a and 4-a. Plate CI, A(X200), Plate CI, B, and Plate CII, A () are prepared from a crosssection of the anthraxylon shown at 2-a in this photograph. 112 BUREAU OF MINES BULLETIN 117 PLATE XVII. OPAQUE VERTICAL SECTION OF COAL FROM ROYALTON , ILL. (X 10) 113 BUREAU OF MINES BULLETIN 117 PLATE XVIII
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
