Lewotolo volcano on the eastern end of a peninsula of Lembata (formerly Lomblen) Island forms a perfect symmetrical cone. The stratovolcano has 2 craters of 900x800 m and 250x200 m in diameter. Many lava flows have reached the coastline. Historical eruptions, recorded since 1660, have consisted of explosive activity from the summit crater.

Lewotolo's lavas are remarkable because they contain the rare mineral zirconolite (CaZrTi2O7).

Source/literature:

"Volatile-induced transport of HFSE, REE, Th and U in arc magmas: evidence from zirconolite-bearing vesicles in potassic lavas of Lewotolo volcano (Indonesia)" Jan C. M. de Hoog and Manfred J. van Bergen, Contributions to Mineralogy and Petrology, Volume 139, Number 4, 485-502