Avery tall, steep-sloped peak made of both lava and volcanic materials

Composite Volcanoes

http://www.geography.learnontheinternet.co.uk/topics/typesvolcanoes.html
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Connecticut, delaware, maryland, massachusetts, new jersey, new york, new hampshire, north carolina, pennsylvania, rhode island, south carolina, virginia

Answer they are produced by collision of tectonic plates;