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Journal Article
Published: 01 May 2009
Russ. Geol. Geophys. (2009) 50 (5): 417–429.
... sediments have been recognized. The most important marker horizons are composed of porcelain-like silicified tuffs, limestones with inclusions of brown chalcedony, calcilutites, salt rock, wax-like bentonitic mudstones, flint clays, tripolis, etc. Stratigraphic charts of the Upper Paleozoic deposits...
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Journal Article
Journal: Economic Geology
Published: 01 May 1978
Economic Geology (1978) 73 (3): 442–446.
...W. D. Keller Abstract Scanning electron micrographs show the textural differences in representative tripoli rocks from the three major tripoli-producing districts in the United States. Arkansas tripoli preserves the polygonal, triple-point texture of the parent metamorphic novaculite. Illinois...