Science Progress, Vol. 3 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Science Progress, Vol. 3

The Carnic Alps are the subject of two memoirs (4, of which the first is a continuation of a part previously pub lished, but the two parts have been issued in book form with some large extra geological maps. Rocks belonging to all sys tems, from Precambrian to Permian inclusive, are described. The Silurian rocks apparently resemble those of Eastern Bohemia, and above them a great mass of Devonian limestones is developed, separated from the Silurian by a marked change of fauna. The lower part of this limestone possesses a Hercynian fauna, the middle portion contains the fossils of the Middle Devonian (including Stringo cephalus), and the upper portion those of the base of the Upper Devonian. Here, as in Bohemia, we have the deep water representatives of the Devonian period. The most interesting feature of this greatly disturbed district is the occurrence of reef-limestones with their accompanying breccias, amongst the Devonian and Triassic deposits. An admirable description of them is given in Frech's valuable work, and no one who is interested in these very remark able, and, at the present time, much discussed structures, must omit to study' it.

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