IV. SECTION ACROSS THE TERRITORY OF CHRISTIANIA. 



Old Red Sandstone- 

 Upper Silurian < 



Lower Silurian I 



References to the above diagram : — 



c. Red sandi.tone and conglomeiate. 



d. Calcareous fiag-^tones, &c. 

 c. Coralline lime'^tone and <;hale. 

 b. Pentanierus limestone, 

 a. Schists, flags, and lower sandstone. 



I rocU, with old granite, greenstone, & c 

 rp. Rhombic porphyry m the Old Red Sandstone. 

 1 1 Eruptive and trapptean rocks of various characters. 



The diagram in page 469 of the first volume of the Journal, accompanying Mr. iVIurcliison's memoir on the Geology of Scandinavia, very imper- 

 fectly represents the interesting and remarkable pheenomena exliibited in the Basin of ChvistianJa. The original section, as given in the great work 

 on Russia (p. 13), by Messrs. Murchison, de Verneuil, and de Keyserling, is now reprinted to justify the conclusions insisted on in the memoir 

 alluded to, and to give an idea of the perfect evidence existing in that part of Norway of the succession there traceable from Lower through 

 Upper Silurian to the Old Red Sandstone inclusive. The section as now given represents on a small scale, towards the right-hand side of the 

 wood-cut, the intrusive rocks (granite, syenite, porphyries, greenstones, amygdaloids, &c.), and the effects they have produced, though it is not 

 pretended that even a twentieth portion of the flexures and contortions are here shown. 



