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McCall, G.J.H. Tektites in the Geological Record: Showers of Glass from the Sky.

London (The Geological Society), 2001, viii + 256 pp. Price £65.00 (members £25.00). ISBN 1 86239 085 1.

The first 20% of the full text of this article appears below.

Tektites are found at or near the surface of a large part of the Earth’s continents and ocean floors. They are present in four major strewn fields and the Australasian one alone covers 10% of the planet. Our understanding of these natural glasses has developed in tandem with the recognition of the importance of impact events in the geological record, and tektites are now generally accepted to have resulted from the ejection of silicate melt droplets from the upper levels of large, terrestrial meteorite craters. There is however no up to date volume in the literature which deals with these important objects.

Tektites in the Geological Record aims to rectify this by summarizing the current knowledge of tektites and related objects (e.g. impact glasses, microtektites). The reader is introduced to the history of tektite studies, with the terrestrial volcanic hypothesis of Charles Darwin . . . [Full Text of this Article]