Lava Beds National Monument and Lassen Volcanic National Park
We arrived at Lava Beds National Monument on July 28. Lava Beds National Monument is on the northeast side of Medicine Lake Volcano, the largest shield volcano in the United States. A shield volcano is a type of volcano named for its low profile, resembling a warrior's shield lying on the ground. It is formed by the eruption of highly fluid lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano. At Lava Beds there are numerous cinder cones and over 80 lava tubes that were formed when Medicine Lake Volcano was active. Lava tubes are caves that were formed while the lava was flowing. The outside surface of the lava in contact with air would cool and harden while the lava below continued to flow.
Here are some photos from inside some of the lava tubes we toured:
The following pictures are from Glass Mountain, another volcano on the side of Medicine Lake Volcano where the lava that erupted formed mostly into obsidian.
This is Glass Mountain in the background. We explored only the lower fringes of Glass Mountain.
There is significant indigenous peoples history in this area as well. The Modoc’s lived in this area and left many petroglyphs. Here are petroglyphs at Petroglyph Point, which was originally surrounded by water and was accessed by canoe when the petroglyphs were carved.
This is a collapsed lava tube, meaning the roof collapsed after the flowing lava below and exited the tube below.
This is Symbol Bridge, a collapsed lava tube with pictographs inside.
Big Painted Cave, a short lava tube with more pictographs.
We moved to Lassen Volcanic National Park on July 31.
Here are some pictures of Lassen Peak from Manzanita Lake on the north side.
Here are some geothermal features at Sulphur Works:
Lake Helen on the south side of Lassen Peak
Kings Creek Meadow
The photos below are from our hike to Kings Creek Falls. Nearly two thirds of the park was burned in the Dixie Fire in 2021. It was fascinating hiking through some of the burned areas, with small areas around streams that didn’t burn.
Here are photos from our hike up to the top of Lassen Peak. Lassen Peak last erupted in 1915. The crater at the top of the peak was fascinating. You could see how the lava hardened into fantastic shapes as the eruptions came to an end.
At the top. This reddish rock was formed 27,000 years ago when Lassen fiwas formed. The blacker rock that you see in other photos was formed when Lassen erupted in 1915.
The crater at the top.
On our way back down.
Photos from Emerald Lake:
Photos from Bumpass Hell, another geothermal area in the park. It is named after a guide in the 1800’s who, shortly after warning his guests to be careful, fell through the crust and severely burned his legs in the boiling mud below the crust.
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