Page:Quarterly Journal of the Geological Society of London, vol. 32.djvu/37



Introduction.

I. Examination in the Field. 1. Unaltered Slate. 2. First Stage of Alteration: Chiastolite Slate. 3. Second Stage of Alteration: Spotted Schist (Knotenschiefer). 4. Third Stage of Alteration: Mica-schist. 5. Granite and its Junctions with the Altered Rocks.

II. Microscopical Examination. 1. Chiastolite Slate. 2. Spotted Schist (Knotenschiefer). 3. Mica-schist.

III. Chemical Examination.

Summary.

Appendix: Notices of papers on similar rocks.