| 21. | Rough quartz sand, clay and fine marl sank and became stages.
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| 22. | Thus references to " greensand marl " sometimes refer specifically to glauconite.
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| 23. | The marl bottom is extremely soft and rich with minerals.
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| 24. | These green and blue marls form a completely waterproof layer about thick.
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| 25. | The Dolomitic Conglomerate is an old shingle beach of Keuper Marl age.
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| 26. | Julius himself wrote a book about the uses of marl.
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| 27. | This is the only Marl game to use this style.
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| 28. | He thus emulated the natural process of sedimentary formation of a marl.
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| 29. | In the Cretaceous marl and shallow water limestone was formed.
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| 30. | It consists of layers of gypsum and marl and limestone.
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