Westermann, J.H.

The photo-geological observations and land capability's land use survey of the island of Bonaire shows
1. topographical features and land use data based on aerial photographs (year of photography 1949)
2. location and analysis of soil and water samples

Overview of knowledge regarding geology and mining of the Netherlands Antilles

In 1942-1943 a water test well was drilled by the Government of Curacao within the limits of Aruba's capital Oranjestad, following the "discovery" of an underground fresh water flow by two French friars operating a detector or divining rod. A depth of 927' was reached without encountering the predicted fresh water. However, abundant salt water under pressure was stuck in a sand bed at 830'. Its salt concentration proved to be twice that of sea water. It may be assumed that rain water enterig the outcrop area of weathered diorite and diorite detritus further inland, percolates down through a dipping sand bed, locked in impervious clay layers, thus constituting an artesian water system. The high salinity of this water is tentatively explained by a process of solution of salts adsorbed in the sands and clays during their deposition in a marine or coastal environment.

Overzicht van de ontwikkelingen en inspanningen ter bescherming van de flamingo broedkolonie in het Pekelmeer in de periode van 1957 tot 1968.

Dit artikel is een bewerking en uitbreiding van de tekst van het gestencilde rapport dat de Natuurwetenschappelijke Studiekring voor Suriname en de Nederlandse Antillen, Utrecht, op het verzoek dd. 25 oktober 1966 van het Hoofd van het Kabinet van de Vice-Minister-President, heeft samengesteld ter voorlichting van de leden van de Eerste en Tweede Kamer der Staten Generaal: Om het voortbestaan van de flamingo' s van Zuid-Bonaire, I957-I967