My task in the area of \u200b\u200bEnglish language, was made in the Etoys activity ...
Day 5 of this month the president of the
In Zumaia Itzurun on the beach, the limit Danian / Selandiense (ago 61.1 Ma, when there was a large drop in sea level) and the limit Selandiense / Thanetian (58.7 Ma ago, when there was a magnetic pole reversal) have been defined stratotype.
When a section is the stratotype , it becomes part of the geologic record that makes up the timetable in the history of the earth, and becomes an international benchmark required for all studies conducted around this time.
In one of the best exposures of Paleocene world we find, apart from those already mentioned, the K / T, at the time of the dinosaurs extinction (65.5 Ma ago) and limit P / E when it was one of the largest warmings in history (55.8 Ma ago).