797 



c. Where active volcanoes do nof exist in the inner row, products 

 of extinct volcanoes cover a vast area. They also occur in the 

 outer row (North coast of Timor). 



The island of Lonibien still contains numerous, partly active 

 volcanoes; in the eastern part of Pantar six independent vents of 

 eruption are known, only one of wliicl» (the Gg Api) still displays 

 the action of the solfatara-stage; the Delaki slill exhibits a beautiful 

 cone-shape, but at present is wooded to the very top. In the east 

 of Alor there is an ancient volcano, the Peak of Alor ^), 1655 m. 

 high and to the south of it we find a second, lower peak ; both 

 have a cone-like shape, but through long erosion they have lost the 

 beautiful regular appearance of a cone. Still farther towards the east 

 we distinguish the old volcano of Pulu Kambing, north of Timor 

 Dilli, farther again in Lirang and Wettei' diabases, gabbros and 

 granites have been laid bare by erosion over vast areas. Roma again 

 consists entirely of volcanic products, tutfs, bi-eccias, conglomerates 

 and solid lava in dykes and Mows *), however without active vents, 

 which do not reappear again before Dammer, farther eastward. 



It would seem then that, starting from Wetter, — where the two 

 curving rows of islands are closest to each other — the volcanoes 

 became extinct at a later period according as they were farther 

 removed from Wetter. Lower down we shall discuss more fully the 

 relationship between the divergence of the rows of islands and a 

 more prolonged volcanic action consequent on a progressing distance 

 between the tnw rows. 



d. In those parts of the regions under consideration where no 

 active volcanoes occur, elevated coralreefs have covered extensive 

 areas. In Panlar coral limestone covers all the older volcanoes up 

 to a cei'tain height above the sealevel (in this island 400 m.); only 

 the young volcanoes Delaki and Iljasi Awieng with the still active 

 vent Gg Api are not covered with limestone at their bases.') In 

 Aloi' the elevated reefs seem to reach a height of 700 m. above the 

 sealevel, they likewise overlie the products of the slightly coniform 

 Peak of Alor. More towards the east in the volcanic island of 

 Kambing (d= 1000 m. high) the volcanic products ai-e covered liy 

 terraces of coral limestone to a great height (± 700 m.)*). Little is 

 known as yet about the occurrence of elevated reefs in Wetter and 

 Roma; in Wetter they occur along the coasts up to 80 or 100 m. 



1) R. D. M. Verbeek. I. c. p. 375. 



■^) Ibid, p. 435. 



8) lb., p. 15. 



+) lb., p. 376. 



. 52 

 Proceedings Royal Acad Amsterdam. Vol. XXI. 



