A Manual of Elementary Geology or, The Ancient Changes of the Earth and its Inhabitants as Illustrated by Geological Monuments

CHAPTER XXXV.

Chapter 3842 wordsPublic domain

METAMORPHIC ROCKS.

General character of metamorphic rocks--Gneiss--Hornblende-schist --Mica-schist--Clay-slate--Quartzite--Chlorite-schist--Metamorphic limestone--Alphabetical list and explanation of other rocks of this family--Origin of the metamorphic strata--Their stratification is real and distinct from cleavage--Joints and slaty cleavage--Supposed causes of these structures--how far connected with crystalline action 463