134 ROSS — Ols PARALLEL LINES OF ELEVATION. 



Africa to Cape Corrientes, and thence through the Kerguelen 

 Islands to Tasmania. The JSTew Zealand sub zone apparent from 

 Macquarie island to the Friendlj Islands (inclusive) — a distance 

 of about 2500 miles — and highly volcanic, is perhaps the most 

 renarkable. 



Zone ISTo. 6. the Sardinian, seems to have its axial line in the 

 volcanic belt of which Etna, Stromboli and Vesuvius, are the 

 principal centres of apparent activity. The Hawaiian Archipelago, 

 the Society Islands, and South Victoria, are other volcanic regions 

 through which this line would pass. In Europe, on one side of 

 the axial line, the chief line of elevation apparent in the islands of 

 Sardinia and Corsica, and the Peninsula of Denmark, is most 

 conspicuous. A series of parallel lines of elevation in Britain — 

 best known in the north of England — is also parallel to this axial 

 line. On ihe other side of the axial line the most remarkable 

 development is in the parallel mountain ranges v^^hich extend from 

 the Red Sea to the Black Sea, and of v/hich the basin of the Jordan 

 forms one of the synclinals. The Oural mountains also seem to 

 belong to this zone. 



Zone No. 7, the Hawaiian, has its axial line passing through 

 the very remarkable volcanic region of that Archipelago, (see 

 Plate 2), through Yesso (in Japan) across Asia; through Arabia 

 and Africa (near the coast) to Cape of Good Hope, and thence 

 through the islands of South Georgia, Tierra del Fuego, and Easter 

 to the Hawaiian Islands. The Island of Madajxascar and other 

 islands in the same range show the existence of a siibzone, of 

 which the apparent length is about 2000 miles. On the other 

 side of the axial line and parallel to it are ranges of elevation 

 apparent for 9000 miles, from the Cape of Good Hope to the Sea 

 of Okotsk. 



It is obvious that the axial lines of the several zones (being 

 approximately great circles of the earth) will each intersect every 

 other twice, and that the two intersections of any two axial lines 

 will be (approximately) antipodal to each other. These intersec- 

 tions are, as might be anticipated, specially remarkable for volcanic 

 activity, and where the intersections of more than two axial lines 

 occur in the same vicinity, as might be anticipated, also the 



