PE ae ee Air MeSAR nr aan we cae am POPS pene theo ae 
* 
Sia 
' 
OG: 1, Williema—-Pamtestna and Hornblende. 267 
rocks occur everywhere imbedded in and passing by gradual 
transitions into more or less schistose amphibolites, which 
‘ nless a mass of rock were 
absolutely homogeneous, a lateral pressure exerted upon it 
8 ros. 
* Ueber die Entstehung der Altkrystallinen Schiefergesteine, etc., Bonn, 1884, 
Pp. 190, et seq. ' 
