Summary
The rocks are from the middle‑Eocene age, about 40 million years ago.
Evidence shows that the area was covered by seawater back then.
Key Points
4 points1
The team examined a famous rock layer from the middle‑Eocene period.
2
Findings indicate the land was underwater during that time.
3
The study helps us understand how the Earth's surface has changed.
4
Scientists used the rocks to piece together the region’s ancient history.
New Words to Learn
6 wordsancient
very, very old
middle-Eocene
a time about 40 million years ago, long before people
sedimentary
rock made from tiny pieces that settled together like sand
formation
a layer of rocks that was created in one place
Karbi Anglong district
a region in the state of Assam in India
marine
related to the sea
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