galvin-hoffman
Uploaded by
8 SLIDES
213 VUES
80LIKES

Understanding Lahars and Geology: Insights from Mount Rainier's Autobiography Strata

DESCRIPTION

This informative text explores the concepts of strata, lahars, and volcanic activity as illustrated by Mount Rainier's geological history. Strata, formed from layers of sediment including soil, volcanic ash, and lava flows, reveal Earth's past under the principle of superposition. Notably, it discusses lahars—mudflows caused by various natural events—that can travel substantial distances, posing hazards. The segment on the K-T boundary highlights the significance of deep geological layers. Furthermore, a mention of Mount Mazama transitions to the captivating history of Crater Lake in Oregon.

1 / 8

Télécharger la présentation

Understanding Lahars and Geology: Insights from Mount Rainier's Autobiography Strata

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lahar Lab Mount Rainier’s Autobiography

  2. Strata: • Strata are layers of rock and other sediment. • Sediment can be soil, glacial deposits, volcanic ash, lava flows, sand, cinders, etc.

  3. Principle of Super Position: • The oldest layers of rock are deeper and the newest layers of rock are closer to the surface (for the most part). • The deeper you go, the older the rock. • The K-T boundary is a layer that was deposited about 65 mya. It has very high levels of iridium (a radioactive element).

  4. An exposed area that includes the K-T Boundary near Denver.

  5. Lahar: • A Tibetan word that means mudflow/landslide. • Lahars can be caused by earthquakes, floods and eruptions. • Lahars can travel for dozens of miles.

  6. Lahar Hazards from Mt. Rainier

  7. Tephra: • An ash cloud from a volcanic eruption that settles over a few days or weeks and forms a rock layer. • Tephra can travel hundreds of miles.

  8. Mount Mazama: • Mt. Mazama is the name given to the volcano that is now Crater Lake. • Crater Lake is in central Oregon.

More Related