'228 



mnlcations along' the fissures is rather widely spread as a product 

 of alteration. Apatite and titanite occnr onlj spoi-adically. 



Vain Nouhuys has already acquainted us with the finding-places of 

 the granites. ') In the western part of the island we must mention 

 the territory of Lekitobi in the first place. Tiie hill westward from 

 the entrance to the lagoon, the hills of the island Kona in the lagoon 

 and likewise Tandjnng Merah — the red cape — at tlie east side 

 are all composed of this rock. The second granite-territory was 

 found on the upper course of (he Wai 11a. where it borders upon 

 strongly folded phyllite. 



The third region is situated norlhward from the Wai Taha and 

 extends in the N.E. tdl beyond the left bank of (he Wai Kabuta. 

 A fourth area occurs on (he upper course of the Wai Najo, where 

 it borders the strata of the Jurassic system. South of this river rises 

 moreover a granite-hill on the coast in the neighbourhood of cape 

 Pasturi. The erratics that were found, besides in the rivers mentioned 

 above, also in others namely Wai Miha, Wai Kilo, Wai 11a, Langsa, 

 Wai Tabana and Wai Kasia point to the fact that granite is widely 

 spread over the interior. H. Bucking finally mentions a biotite-granite 

 containing hornblende from the Wai Husn '^). 



The contactmetamorphical formations, which have been caused 

 by the eruption of the granites, deserve attention however in the 

 first place, especially because both old slates and Jurassic sediments 

 have been concerned in it. 



On the northside of the lagoon Lekitobi an andalusite-mica-rock 

 is found as a rock. In the pink compact rock macroscopically only 

 numerous silver-white laminae of muscovite can be detected which, also 

 according to the microscopic examination, form also the chief con- 

 stituent. Besides the aggregates of these colourless laminae there are 

 also those of irregular grains of quartz. 



The elongated prisms of andalusite are already to be recognized 

 by their relief, they are nearly colourless in the thin sections and 

 show no perceptible pleochroism. Rather numerous are the fiuid* 

 inclusions which they contain. As an accessory constituent tourmaline 

 is present in the form of little strongly pleochroitical prisms (0 = yellow 

 to greenish-brown, E almost colourless). Ore is irregularly scattered in 

 the form of black grains, and occurs moreover as a fine dust 



1) Bijdrage tot de kennis van het eiland Taliaboe, p. 949, 951, 963, 967, 971, 

 972, 1174, 1178, 1180, 1184, 1185, 1190, 1191, 1193-1195. 



-) G. BoEHM. Geologische Mittheilungen aus dem Ind. Auslralischen Archipel. 

 Neues Jahrbuch fur Min. Beil. Bd. 27. 1906 p. 93, 



