THE ITRON-FORMATION ON BELCHER ISLANDS 419 
sive mass consists of more than one flow, because in some places 
the surface of contact between two flows may be traced for a long 
distance (Fig. 6). Ellipsoidal and amygdaloidal structures are 
Fic. 3.—View of Innetallung Island showing in the foreground the limestones and 
quartzites and in the distance the white quartzite overlain by the iron-formation and 
it in turn by the great basalt flow. 5 
aS 
Fic. 4.—The great basalt flow overlying cherty shales and jaspilite on the shore 
of Kasegalick Lake. 
