1 Ebook di Heldur Nestor
Paul Copper & Heldur Nestor: Late Ordovician and Early Silurian stromatoporoid sponges from Anticosti Island, eastern Canada
During Late Ordovician and Early Silurian time, from 450 to 428 million years ago, stromatoporoid sponges were some of the most common and abundant fossils in shallow water tropical settings of the A …
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