487 



The heavy eruption, lasting only live hours, took place in 1905. 

 About Ambu Rombo 2147 m, high, also called Suri Laki, better 

 known by the name of Gunlmg Keo, we do not know much more 

 than that it has been for more than half a century in a situation 

 of solfataric activity. According to Pannekoek ^ the solfataras are 

 especially situated in the neighbourhood of the northern edge of the 

 top''). As far as it is known only augite-andesite is found as 

 rock on the coast. Ngaru Tangi (1537 m.) rising over the S. W. 

 corner of the Endeh Bay is a volcanic ruin. 



In the territory of the Endeh Bay the western part of its north- 

 coast, especially the environs of Nanga Pandan, was examined in 

 1910 by JoH. Elbert'). He wrote in his first communication that 

 Central Flores had been "durchquert" ^) by him and that he had 

 found: graywackes, diabase-tufas, melaphyre-breccias, quarzites, marls, 

 which were perhaps| of palaeozoic acfe. In his work published 

 two years afterwards he does not mention these at all, neither are 

 the above-named rocks found back in it, but quite different ones 

 are indicated. Referring to the determinations of M. Belowsky and 

 G. Rack he says, that he has found on the Wawu Manu Balu as 

 fundamental rock hypersthene-diorite-poi-phyrite, over it hornfels, 

 which was succeeded by tufa-rock. On the steep declivities of 

 Woro Weka in the valley of Oto Weka he perceived at the bottom 

 augite-diorite over it hornfels and furtliei* quartz-sandstone. He 

 surmised the existence of a contact of the plutonic rocks ^). In 

 Georg Rack's description of the collection gathered by Elbert (39 

 specimens in allj however the name of not a single one of the 

 above-mentioned rocks occurs. On the contrary he describes from 

 the river Manu Bala dacite and andesite, from Oto Weka and 

 Langa Weka exclusively andesite ! "). According to Elbert a gray 

 limestone containing numerous Globigerina's and a few Rotalia's 

 occurs near cape Ngaru Kua on the North-coast of the Endeh Bay ^). 



1) J. J. Pannekoek van Rheden. Eenige geologische gegevens. 1. c, p. 

 136 — 137. — Overzicht van de geographische en geolog. gegevens ... 1. c, p. 220. 



-) A. WiCHMANN. Bericht über eine . . . Reise nach dem hidischen Archipel. 

 Tijdschr. K. Nederl. Aardr. Genootsch. (2) 8. 1891, p. 231. 



S) B. Hagen. Bericht über die von Dr. Elbert gefiihrte Sundaexpedition des 

 Frankfurter Vereins fur Geogr. und Stat. Petermanns Mittlg. 56. 1. 1910, p. 308. 



■^) A somewhat euphemistic expression, if we consider that the direct distance 

 between Nanga Pandan and Geni is only about 10 km. 



5) I.e.. p. 2Q1. 



6) Petrographische Untersuchungen an Ergussgesteinen von Sumbawa und 

 Flores. N. Jahrb. f. Min. Beil. Bd. 34. 1912, p. 73-82. 



7) 1. c, p. 201. 



