Page 43 - Curriculum Visions Dynamic Book. To close the book, close the window or tab.

mark each underwater eruption.
Cinder cones
cinder cones (also called scoria cones) are small landforms made of loose fragments of material usually between pea and fist sized. The sides of the cones tend to stand at the angle of rest of coarse material, about 30°. These cinders are the remains of pyroclastic materials that were thrown out of a vent and cooled before landing. During the eruption the cinders would have been volcanic bombs, and the type of eruption would have been Hawaiian or Vulcanian (see pages 47 and 50). Most cinder cones are made from basaltic materials.
One of the most famous cinder cones in the world is Paricutin in Mexico, which formed a 410-metre-
high cone between 1943 and 1952. The cone began to emerge quite unexpectedly one day in some cultivated farmland and continued to grow for nine years. Many cinder cones erupt in the same area to make a volcanic field. The Mountains of the Moon, Idaho, are a volcanic field.
(Above) A space shuttle view of the seamount Bora Bora in the Pacific Ocean.
(Below) Looking from Tahiti across to Moorea in the Society Islands of French Polynesia. These reef-fringed mountainous islands are seamounts.
43