From the May 2016, Our State Magazine (North Carolina).
If you walk in front of the seawall between Kure Beach and Fort Fisher at low tide, you'll come upon the only coquina outcrop on the North Carolina coast.
It is located a short distance from the Fort Fisher State Recreation Area, these mounds of clumped shells have been hardened over the years from surface exposure.
They form a small platform extending beneath Kure and Carolina beaches as well as Masonboro Island.
To view them, you'll need to check tide tables as they are only fully exposed at this spot at the lowest tides.
It was the removal of these rocks off the coast of Federal Point for the construction of the US-421 roadbed, that led to the dramatic incursion of the ocean on the remains of Fort Fisher.