sea arch

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Rural Irish landscape, Sligo, Ireland.

Why Is Ireland Two Countries?

Marriage. A couple getting married during a church wedding ceremony. (religion, ceremony, bride, groom)

The Seven Sacraments of the Roman Catholic church

Two chicks near an egg with a white background (poultry, chick, chickens, birds).

What Do Eggs Have to Do with Easter?

African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.

Timeline of the American Civil Rights Movement

Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.

Timeline of the Titanic’s Final Hours

Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

Causes of the Great Depression

New Zealand. Political/Physical map. Includes locator.

Where Is “Old Zealand”?

sea arch

natural bridge

Learn about this topic in these articles:

coastal landform erosion

In coastal landforms: Sea arches
Another spectacular type of erosional landform is the sea arch, which forms as the result of different rates of erosion typically due to the varied resistance of bedrock. These archways may have an arcuate or rectangular shape, with the opening extending below water…
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natural bridge

In natural bridge
A related form is the sea arch, produced where remnant headlands may be cut through by waves. Collapse of the bridge portion of a sea arch commonly produces a sea stack.
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