Review of Volcano shapes:

Mt. Isabela, a shield volcano.

Lava plateaus or dome volcanoes.

Cinder cone volcano diagram shown above.

Famous cinder cone of Mexico's Mt. Paracutin. 

Composite volcano above called Mt. August. 

Strato-volcano picture.   Very common and scenic picture of how volcanoes create shapes. 

Mt Rinjani volcano shown above.

  This is known as a caldera.  Most of the cone of the volcano blew up after a major eruption hundreds of years ago. 

Crater Lake Caldera National Park, Oregon.