Subduction also generates an upwelling of molten crust that forms mountain ridges and volcanic islands parallel to the trench. Examples of these volcanic arcs can be seen in the Japanese Archipelago, the Aleutian Islands, and many other locations around this area called the Pacific Ring of Fire.. Trenches are long, narrow and very deep and, while most are in the Pacific Ocean, can be found around the world.
Portland Head Light, South Portland, ME - 1791. One of the most photographed and popular lighthouses in the country because of its beauty and spectacular views, its history and its literary associations. Built by authorization of George Washington: Maineâs oldest light, Portland Head, was originally authorized in 1787 by the Commonwealth of Massachusetts.
Pemaquid Point is the next peninsula traveling Down East after Boothbay Harbor. The towns of Pemaquid, New Harbor, Bristol and Round Pond are off the usual path of most Maine tourists heading for Camden or Bar Harbor. Pemaquid is home to one of Maine's most iconic lighthouses. In fact, the Pemaquid Light is on the Maine quarter, the first U.S. coin to feature a lighthouse. The Pemaquid Point Light was built in 1835, and marks the entrance to Muscongus Bay and Johns Bay.