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S., good sections of these old brecciated alluvia occur.

The rauchstein of the modern section is distinguished by stringers of calcite, which give it at times a brecciated appearance.

Continued movement will give the brecciated fragments of sandstone a rounded form by rubbing them against one another, and, in this way, a crush-conglomerate is produced.

It is also applied to those brecciated and stalagmitic deposits on the floor of caves, which frequently contain osseous remains.

I could not satisfy myself whether this variety of colour proceeded from partial impregnations of bitumen, or from a brecciated structure.