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Published online by Cambridge University Press: 19 July 2017
There are two levels at which the internal structure of a stromatoporoid is classified. The first level includes structures which can be discerned in a thin section using low magnifications (10X); these are called macrostructures. The second level is composed of structures that are not evident unless a thin section is magnified to a higher degree (50X-100X). These smaller scale aspects are referred to as microstructures.