Geology and Mineralogy. 



ing fossila In addition the r 

 includes in parallel position with the rest and adjoining the cal- 



cii'i'rous gneiss, a belt of " saussurite gabbro or greenstone." The 

 strike of the whole is about K.N'.K. : and, according to the author. 

 the limestone or marble, the various kinds of schist, including the 

 gneiss and granulyte, together with the quartzyte and conglomer- 

 ate, appear to make one continued metamorphic series. 



He says: The various gneisses which appear to he included 

 within the Silurian tcrrane, I am inclined 1<> regard as sedimentary, 

 strata originallv formed of |<>o-e material such as -ravel and sand 

 of granite or gneiss origin ; and the argillitic and ordinary mica 

 ><diist>, sometimes porph yritie, in which occur Trilobites and other 

 •••iiiinal remain- at Yagtdalen, as once beds of clay or mud: the 



gneiss of Trengeivid is probably an iltei d compre-ed breccia. 



ern Uergen in two zones; ] u 1,0th of them the fine" grained argillitic 

 -ehi-1 graduate- into coarse mica schist (muscovitic), and includes 

 layers of gneiss ; and h,,tl, an fossil(p '•""•-'• The fossils found 

 near ( Koreu at Kuven, in lenticular masses of limestone, are 



of <Tastcropods referred to Mnr<-hisi>,tt<i or Snlmlitux. In the 





:i. U?ol»,i ;<;,1 K,-u ,„;„,«;<>,,* in S„„i !„,■>, Colorado <'„,! Xorti 

 <»<* Lnlrtrbnth /-b.J/L"oA ,M .\V,' n )/' !';, ',', b> < . A. Wi.itk, M.I 



