Question

In states along the Gulf of Mexico, fossilized seashells from millions of years ago are often found on land many kilometers from the shore. These fossils are evidence that
A.
seashells are formed by land creatures.
B.
the Gulf shoreline was farther inland in the past.
C.
the Gulf shoreline was farther out to sea in the past.
D.
the Gulf shoreline's location has not changed.

Answer 1

The presence of fossilized seashells on land many kilometers from the current shore indicates that the area was once underwater and part of the Gulf. This suggests that the shoreline has changed over time. The correct answer is:

**B. the Gulf shoreline was farther inland in the past.**