The role of aerodynamical phenomena in shaping and sculpturing Australian tektites

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ID: 297075
1958
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Abstract
The primary shapes, of which spheres and spheroids constituted the greatest proportion, were cold on initial entry into the earth9s atmosphere, and each member of each shape group already possessed pre-formed complex internal flow patterns and bubblepitted, flow-swirled surface features. Conflict with the atmosphere during ultra-supersonic speeds of earthward passage resulted in considerable diminution in bulk of each australite. This arose from removal of glass in front surface and equatorial regions under the influence of ablation and thinfilm fusion-stripping, accompanied by the building up of circumferential flanges with plane spiral coiling on the peripheral edges of the otherwise unaffected back surfaces, and the production of small troughs and ridges as newly formed sculptural elements upon the front surfaces. The production of the relatively rare flat, thin varieties of australites, hitherto regarded as difficult of explanation, is readily envisaged under the terms of aerodynamical control at high speeds of flight.
Reference Key
openalex_W2083315370 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors George Baker
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Journal american journal of science
Year 1958
DOI
10.2475/ajs.256.6.369
URL
https://ajsonline.org/article/58708.pdf
Keywords Keywords not found

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