SKETCH-MAP of GIIAN 



(CHRISTIANIA DISTRICT) 

 BY W- C.BROGGER &* T.MUNSTER. 



REFERENCE. 



Scale. 1: 150, 000 



= -4225 inch to the mile, or about 2-36 



miles to the inch. 



EUS] Quartz-Syetiitc (Nordmarkitc). 

 ** -+ Dykes ofS'olvsberget (. -Egyrine-trachyte ) 

 ''•*. Dykes of l\lici>tl>en-porfihyry. 

 \±LilAShcetsofCamptonite&Bostonite-breccia 

 EE23 Basic Rocks of Laccolites & Bosses. 



I I Silurian Strata. 



Archcean Crystalline Schists. 



I — ————— 



UHgCv.SC 



Note. — Tlie numerous dykes of camptonite and bostonite are entirely omitted 

 in the above map, because it would be impossible to represent them 

 satisfactorily on so small a scale. 



Q.J.G.S. No. 197. 



