Journal
STRATIGRAPHY AND GEOLOGICAL CORRELATION
Volume 26, Issue 3, Pages 261-266Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S0869593818030085
Keywords
reef formation; biotic crisis; Ordovician-Silurian boundary; Upper Ordovician reefs
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Reef formation in the Late Ordovician was relatively widespread in the Sandbian and Katian times. In the late Katian, it gradually reduced and ended in the Hirnantian, before the end of the Ordovician. In parallel, reef-building skeleton frame-building biota disappeared and was replaced with algae and calcimicrobes.
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