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Mountain Building: Volcanic Mountains

Related Article: Learn more about volcanoes.

Volcanic mountains form when magma or lava solidifies into solid rock. This type of mountain commonly forms on divergent boundaries and on some convergent boundaries.

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Why? Tell Me Why! Alaska Oil (1:30)

After spending a week in Alaska, Discovery News' Kasey-Dee Gardner wanted to find out why the state is so abundant in that resource.

Huge Diamond (1:39)

Watch this Reuters video to see the largest colorless diamond in the world. The 101 carat gem is about the size of a ping-pong ball and it was discovered in South Africa from a stone that was cut from a 460-carat hunk of rough crystal.

Life - Earliest Evidence (3:01)

Rocks dating back nearly four billion years hold the oldest record of life on Earth, and possibly clues to the nature of life on other planets.

Sea Cliffs (0:41)

From the Archives of Discovery: Over time, the ocean erodes rock into dramatic and strange formations. Learn more about sea cliffs here.

Glitzy Gifts That Give Back (5:09)

The Diamond Information Center has spearheaded a project with four well-known charities in an effort to give back to those afflicted or affected by AIDS and Cancer. Shoppers will have the opportunity to purchase jewelry pieces with a portion of... More »

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Life - Earliest Evidence (3:01)

Rocks dating back nearly four billion years hold the oldest record of life on Earth, and possibly clues to the nature of life on other planets.

Life - Earliest Evidence (3:02)

Rocks dating back nearly four billion years hold the oldest record of life on Earth.

What Are the Odds? Yellowstone (2:52)

What are the odds a volcano will erupt in Yellowstone National Park? Learn more about odds in this video.

Sea Cliffs (0:41)

From the Archives of Discovery: Over time, the ocean erodes rock into dramatic and strange formations. Learn more about sea cliffs here.