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Dating Lava Flows on Mauna Loa Volcano, Hawaii

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Education, History, Law, Politics, Life Science, Ecology, Forestry and Agriculture, Astronomy, Chemistry, Geology, Geoscience, Physics, Space Science, Science and Technology
PBS LearningMedia, PBS Learning Media, University Corporation for Atmospheric Research
Provider Set:
PBS Learning Media: Multimedia Resources for the Classroom and Professional Development, Teachers' Domain, DLESE Community Collection
Upper Primary, Middle School, High School, Career / Technical
Grade 3, Grade 4, Grade 5, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11, Grade 12
Material Type:
Activities and Labs, Images and Illustrations, Reference
Media Format:
Text/HTML, Video
University Corporation for Atmospheric Research Abstract:

For hundreds of thousands of years, lava flows have created intricate patterns on the slopes of Hawaii's Mauna Loa volcano. Until the mid-1970s, it was impossible to know when each of the flows occurred. However, as this video segment describes, a researcher has discovered a way to date the flows by determining the age of carbonized plant remains that they covered. The segment is four minutes thirty-three seconds in length. A background essay and discussion questions are included.

PBS LearningMedia Abstract:

In this video segment adapted from NOVA, scientists search for carbonized remains of plants preserved in lava flows to find out how long it has taken rain forests on Hawaiʻi to regenerate after a volcanic eruption.