394 MET A MORPHISM IN NOR WA Y. 



points, we can only add a few general observations on the range 

 and extent of these rocks in other countries. Gneiss and mica 

 slate in small quantity occur in the Vosges, and gneiss more abun- 

 dantly in the Black Forest. 



The long irregular chain of the Alps contains a vast quantity of 

 gneiss and mica slate, variously extended around the talc-bearing 

 granite cores of Mont Blanc and St. Gothard, from the Mediterranean 

 almost to the Danube. 



Gneiss and mica slate do not reappear around the granitic base of 

 the Carpathians. Their place is supplied in this chain by a vast 

 deposit of clay slate. 



The mountains which encircle Bohemia are, on all the southern 

 half, granite. Gneiss and mica slate are superadded on the west, and 

 the former rock in particular abounds in the Erzgebirge. The Riesen- 

 gebirge granite is bordered on the north by gneiss, on the south and 

 east by mica slate, and these rocks are associated with granite in the 

 range which divides the drainage of the Oder and the Elbe. 



These rocks are most extensively spread over the northern parts 

 of Europe, and extend from Copenhagen round the Gulf of Bothnia, 

 and along the Ural chain toward the Caspian Sea, and in the Caucasus. 



Fossil-Bearing Schists of Norway. Dr. Hans H. Reusch has 

 shown that fossils occur in the schists of Norway to the south of 

 Bergen, in the neighbourhood of Osb'ren. The fossils occur on two 

 horizons. In the southern horizon, grey, blue, crystalline limestone 

 occurs in black clay slate, and bears fossils which are only indicated 

 by clear outlines. The limestone is concretionary, and some of the 

 concretions at Kuven contain the corals Halysites and Syringophyllum. 

 Both these genera also occur in the calcareous band on the Os river ; 

 and in that locality and at Bauerhof Valle a few Gasteropods are seen 

 in section. On the other horizon the fauna is richer, and is seen on 

 the road to the north-east of Ulven. The road traverses a grey slate, 

 apparently micaceous, which contains layers of calcareous concretions. 

 These beds yield in the different exposures Favosites and Graptolites. 

 The richest locality is in the Bauerhof Vagtdal, where the rock is a 

 grey Muscovite slate with inclusions of brown mica, and shows under 

 the microscope a good deal of quartz and rutile associated with the 

 mica. The fossils are Trilobites, cup-corals, chain-corals, and Brachio- 

 pods, and their mode of occurrence indicates that the foliation is in a 

 different plane from the bedding. The Trilobites comprise Calymene 

 and Phacops. The Gasteropods are referable to Subulites or Murchi- 

 sonia, and perhaps Pleurotomaria. The Brachiopod genera have not 

 been determined. The corals are Cyathophyllum, Halysites catenularius, 

 probably Syringophyllum organum, and some other types. The Grap- 

 tolites comprise Rastrites and Monograpsus, and there are indications 

 of Crinoids. This fauna indicates strata of Wenlock age. 



In 1865 Sismonda described an Equisetum from an isolated block 

 of gneiss, probably derived from the Veltline. 



Metamorpliic Rocks in America. In America, Humboldt describes 

 gneiss as less abundant along the high chains of the Andes than along 



