ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] There are two hypotheses to explain the appearance of concentric stratification of siliceous sponge spicules. Biitschli2 contends that stratification is due to alternating layers of different refractility which he surmised is caused by a minute alveolar structure and, on the other hand, Schulze3 ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/232501a0
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