Answer:
A sedimentary rock containing a fern fossil tells us the rock was on land at the time it was formed.
Step-by-step explanation:
Vascular plants like ferns can be found growing on land. The country's mountainous, wet, and shaded regions are where you can find them most frequently.
One thing that can be inferred from the discovery of fern fossils beneath sedimentary rocks is that the location was formerly on land and not under water.
The shift in the area's location and topography may have been caused by geological processes that occur over time.
Hope this helps! :)