Shortcut Navigation:
b.7_volcanic_cases hero.jpg

Volcanic Environment

Volcanic Environment

  • About

    • This specimen is an example of a mineral that formed in a volcanic environment.

      Show more
  • Exhibition Text

    • When molten, silicate-rich fluids erupt onto the Earth’s surface, minerals often form in the numerous pockets and holes that develop in the cooling lava.

      Audio Transcript
      These two cases show minerals that are formed through the activity of volcanic lava flows. One of these cases contains a collection of minerals that has been found in the basaltic lava flows near Paterson in New Jersey approximately 20 miles west of New York City. These minerals did not form in the basalt specifically, but rather in small spaces developed within the basalt. These little pockets, cracks, and fissures contain these minerals, actually secondary minerals, and include such colorful kinds as number 18, prehnite, and number 14, amethyst.

      Many of these minerals, too, display exquisite crystal form. Notice number 9, in which the natrolite is featured, or specimen number 17, the specimen of mesolite. To the right of the Paterson collection are minerals that typically have developed in other volcanic areas. Perhaps the most typical mineral that is associated with volcanic activity is specimen number 4, sulfur. 

In This Section

b.7.02_sulfur_4_DF.jpg

Sulfur (#4)

This mineral formed in a volcanic environment.

American Museum of Natural History

Central Park West at 79th Street
New York, NY 10024-5192
Phone: 212-769-5100

Open daily from 10 am - 5:45 pm
except on Thanksgiving and Christmas
Maps and Directions