Lyra Reef is a remote submerged coral
atoll
An atoll () is a ring-shaped island, including a coral rim that encircles a lagoon. There may be coral islands or cays on the rim. Atolls are located in warm tropical or subtropical parts of the oceans and seas where corals can develop. Most ...
, about in
diameter
In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It can also be defined as the longest Chord (geometry), chord of the circle. Both definitions a ...
, extending over an area of . It lies about north-east of
New Ireland in the
Bismarck Archipelago
The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about .
History
The first inhabitants of the archipela ...
of
Papua New Guinea
Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...
, and north-east of
Simberi Island
Simberi Island is a volcanic island in the Tabar Group, in Papua New Guinea's New Ireland Province.
Geography and geology
Simberi is the northernmost and smallest of the three islands in the Tabar Group. The island is about long and wide and ha ...
, the closest island, and about the same distance north-west of the
Nuguria Islands.
The depths around the perimeter of the reef are generally less than and in places are less than . The least depth is on its north side. Within the reef, in the
lagoon
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'') an ...
, there are depths of exceeding . A gap on the north-west side of the reef gives access to this deep water. Depths of more than are found within of the reef.
See also
*
List of reefs
This is a list of notable reefs.
Reefs
See also
* Fringing reef
* Recreational dive sites
* Recreational diving
* Southeast Asian coral reefs
*'' The Structure and Distribution of Coral Reefs''
References
{{corals
*
* ...
References
External links
Nautical chart of Lyra Reef
Reefs of Papua New Guinea
Coral reefs
{{PapuaNewGuinea-geo-stub