Lady Douglas Island is an island in the

North Coast North Coast or Northcoast may refer to : Antigua and Barbuda * Major Division of North Coast, a census division in Saint John Parish Australia *New South Wales North Coast, a region Canada *The British Columbia Coast, primarily the communiti ...

region of the

Canadian province Within the geographical areas of Canada, the ten provinces and three territories are sub-national administrative divisions under the jurisdiction of the Canadian Constitution. In the 1867 Canadian Confederation, three provinces of British North ...

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

. It is located off the south coast of

Dowager Island Dowager Island is an island in the North Coast region of British Columbia. To its west is Finlayson Channel, to it east Mathieson Channel. Susan Island lies to its north and Lady Douglas Island to its south. James Johnstone, one of George Vanco ...

. Lady Douglas Island is part of a volcanic area called the Milbanke Sound Group which includes monogenetic

cinder cone A cinder cone (or scoria cone) is a steep conical hill of loose pyroclastic fragments, such as volcanic clinkers, volcanic ash, or scoria that has been built around a volcanic vent. The pyroclastic fragments are formed by explosive eruptions o ...

Basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...

tuff Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock cont ...

breccia Breccia () is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix. The word has its origins in the Italian language, in which it means "rubble". A breccia may have a variety of di ...

s on Lady Douglas Island originated from Helmet Peak on the north end of

Lake Island A lake island is any landmass within a lake. It is a type of inland island. Lake islands may form a lake archipelago. Formation Lake islands may form in numerous ways. They may occur through a build-up of sedimentation as shoals, and become ...

.Global Volcanism Program: Milbanke Sound Group
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References

Islands of British Columbia North Coast of British Columbia Range 3 Coast Land District {{BritishColumbiaCoast-geo-stub