This is Part 1 that relates to volcanic mudflows (lahars), boulders and logs, in the Cascade Range Mountains, USA. It features volcanic deposits from active and extinct volcanoes in Washington State and California, and relates these to modern volcanic hazards. This includes modern deposits at Lassen Peak, California, and Mount Rainier, Washington--and ancient deposits from the Thorp and Vantage area, Washington. Note that Part 2 will be published later.
The video interprets volcanic lahars, pumice, basalt, dacite, andesite, petrified wood, and other mudflow log debris. Additionally, it discuses river (fluvial) sediments, braided rivers, glacial ice, snow fall, hot springs, and other factors that relate to volcanic hazards.
This video is meant as a special demonstration product--showing ways to relate 360-degree photography (photogrammetry), in science education. The video required about four months of work to complete, and pushed my editing skills, and available software and hardware to its limits. The video was made with an iPhone 13 Pro, iMovie, and it is not a product of Artificial Intelligence. Ten object "spins" of rock samples and bedrock exposures, are included in this video. Each object spin uses about 300 photo per minute of video "spin". It improves the visual aspects with 360-degree videos. It is meant to improve public awareness, and student instruction. The orientation of the video explores the geologic evidence from volcanic hazards in the past, and how that can be used as a guide to interpret future volcanic hazards.
Volcanic eruptions in the Cascade Range do not happen often. However, an eruption event can create extreme hazards when circumstances are significant. A modern example is from the South American country of Columbia. In 1985 an eruption of a volcano similar to Washington's Mount Rainier, created mudflows that killed 23,000 people. Cascade Range volcanoes have erupted multiple times in the 1900s. This included Lassen Peak and Mt. St. Helens. Other active volcanoes are in the Cascade Range too.
This video is only a general survey of the geologic evidence. If volcanic hazards concern you, please educate yourself more on this topic, and how it may relate to you. The following are some sources of information on this topic.
These government organizations can answer questions: Washington Geological Survey (Olympia, WA). Oregon Department of Geology and Mineral Industries (Portland, OR), California Geological Survey (Sacramento, CA), British Columbia Geological Survey (Vancouver, BC, Canada).
Here are some Internet videos and references (these links are not associated with this RU-vid channel):
--Living with a Volcano in your Backyard: pubs.usgs.gov/of/1998/0519a/r...
--Mount Rainier Lahars: www.google.com/search?q=mt.+r...
--Perilous Beauty: • Perilous Beauty: The H...
--What are Volcanic Hazards? • What are Volcanic Haza...
--Roadside Geology of Mount Rainier: fortress.wa.gov/dnr/geologyda...
--Volcanism on the Puget Lowland Landscape: file.dnr.wa.gov/publications/...
--Mt. Lassen 1915 (eruption): • Mt Lassen 1915
Hello Rock People! This is Dave the Geology Dude. Note that I have other videos with more rock identification information on my RU-vid channel. Don't forget that: Geology isn't Rocket Science--it's Rock Science! Please "like" and subscribe to this RU-vid channel!
Video Chapters:
0:00-: Introduction and purpose
0:26-: Thorp, Washington lahar location
1:23-: Descriptions of rocks in the Thorp area (pumice and basalt)
2:16-: Discussion about forecasting volcanic eruptions
3:07-: General outcrop orientation near Thorp
3:51-: Three areas of the rock exposure (river and mudflow deposits)
6:27-: Another rock exposure area at Thorp (river deposits)
7:20-: Mudflow deposits--Inset 1
8:09-: Mudflow boulder--Inset 2
9:08-: Deposits near Vantage, Washington (Ginkgo Petrified Forest, petrified wood, pillow lavas)
11:17-: Lassen Peak, California: the "Hot Rock" boulder, and the "Devastated Area"
12:45-: Orting, Washington mudflow boulder, Electron Mudflow
14:15-: Tacoma, Washington: Douglas Fir tree sample from Electron Mudflow
14:51-: Mount Rainier, Paradise area, Washington: discussion of glacial ice and snow
15:51-: Summary and preview of Part 2 video topics
Various maps in California/Washington are from Google Maps, ©2023. All other material comes directly from locations described in the video. The hot spring video portion is from Lassen Peak.
Copyright by David Knoblach, ©2024. All rights reserved
14 май 2024
