A Look Back at Ten Years of Geotripping: Vagabonding on Dangerous Ground, an Exploration of Cascadia

In 2015 I wrote a blog series about driving through the "Most Dangerous Plate Boundary" in the world, but it was actually about driving through a fossil subduction zone that is exposed in the Coast Ranges, Great Valley and Sierra Nevada of Central California. In the summer of 2015, Mrs. Geotripper and I took a long journey along the entire length of a real "dangerous plate boundary", the Cascadia subduction zone, that extends from Northern California to British Columbia. The trip coincided with a media explosion over the very real possibility of a magnitude 9 earthquake along the Pacific Northwest coastline. This resulted in another blog series, Vagabonding on Dangerous Ground. Here is a compilation of the journey...

This was posted on September 13, 2015...

I've finished a new blog series on our exploration of the Cascadia Subduction Zone, so I've compiled all the posts in chronological order so you can get the story the correct sequence. Thanks for all the nice comments, responses, and corrections! Click on the orange titles for the post.

On the Road in the Pacific Northwest: The introduction and overview of the new blog series.

Following the Cascadia Subduction Zone on Highway 101: This post provided the geological background for understanding the hazards of living in the lands influenced by the Cascadia Subduction Zone.

In This Land of the Sasquatch There are Ancient Giants: The first leg of our journey took us through the range of the California Redwoods and the land of black bears that look suspiciously like walking ape-people.

The End is Coming (of the Cascadia Subduction Zone): The end of Cascadia is a slow process, but the zone is disappearing slowly, being replaced by the San Andreas fault. It's also a look at one of the loneliest beaches in California.

A Geologist Walks Onto a Bar in Cascadia: Exploring the unique baymouth bars along the Humboldt county coast.

Northern California's Tsunami Central: Crescent City has a tragic history of tsunamis, especially the one in 1964 that took a dozen lives and destroyed the marina and downtown areas.

This "Dismal Forest Prison" and other problems exploring the Northwest: The Pacific Northwest was particularly difficult to explore and map, at least if you weren't part of the indigenous culture. Here are some accounts of the discovery of Humboldt Bay by land.

Into the Land of Sand, and Exploding Whales: Between Coos Bay and Florence, Oregon, is the longest stretch of sand beaches and dunes in the Pacific Northwest. Yeah, and the whale thing...

Into the Realm of the Devil (and Sea Lions): There are a lot of things named for the devil on the Oregon coast for some reason. And some incredible sea caves occupied by sea lions.

Putting on a Happy Face at Dismal Nitch and Cape Disappointment: We reach the mouth of the Columbia River, where Lewis and Clark reached their goal. It's undergone a great many changes over the years.

Into the Rainforest, Seeing Something Strange...Rain: We explore the Hoh Rainforest in Olympic National Park for the first time, and encounter something strange, at least this year: rain. There was also a fire burning in the rainforest. That's not normal.

The Diverse Landscapes of Olympic National Park: Olympic is one of the most diverse of our national parks, with alpine glaciers, rainforests, and coastlines. It's spectacular.

The Salish Sea and the Strait of Juan de Fuca: Glaciers and tectonics combined to form a seaway east of Vancouver Island and the Olympic Peninsula. It's a unique ecosystem quite distinct from the Pacific Ocean just a few miles away.

Stone Rings, Glaciers, and "Dinosaurs" on the Coast of the Salish Sea: Desecrated burial mounds, avian dinosaurs, and glacial landscapes. Victoria on Vancouver is both a beautiful city and a fascinating place to explore.

Exploring North America's Southernmost Fjord: We take the ferry to the mainland, making landfall inside of the southernmost glacial fjord in North America, Howe Sound in British Columbia (defined here as on the mainland, but connected to the ocean; opinions differ!).

Landing Place of the Thunderbird and the Grimy One, the Volcanoes of British Columbia: Black Tusk and Mt. Garibaldi two of the northernmost volcanoes in the Cascade Range. I missed them last year in the rain, but saw them this time.

Controversial Stone People, Fire and Ice, and an Olympic Legacy: We made it to Whistler and the home of the 2010 Winter Olympics. The stone people were controversial, but the scenery was not. It was spectacular.

Seeing Volcanoes from the Inside Out at Siám' Smánit (Stawamus Chief): Glaciers and granite! Stawamus Chief is a dramatic granitic dome rising high above the end of Howe Sound. It was once the magma chamber of a volcano.

Our Tour of the Greatest National Park I Never Once Set Foot In: North Cascades National Park is a true primeval wilderness. No roads penetrate the park boundaries. But what incredible scenery!

The Geology that Explains Why North Cascades is a Park Divided: The Skagit River may be the most altered water course in the Pacific Northwest, but it provides 20% of Seattle's electricity. It splits a national park in two.

What's East of North (Cascades), A Brief Explore: North Cascades doesn't have all the scenery; the lands to the east are rather spectacular too, and offer some great geology.

Playing Hide and Seek with a Sleeping Monster: Mt. Baker is not the most active volcano in the Cascade Range, but it is capable of great mayhem. It even looked for awhile like it might blow back in 1975.


Danger Follows Us Home (As it does all of us): A Mt. Shasta drive-by (photo) shooting, and a wrap-up of the series. Danger is always with us no matter where we are. It's not to be feared, but respected and prepared for.

Vagabonding on Dangerous Ground: A Compendium of Posts

I've finished a new blog series on our exploration of the Cascadia Subduction Zone, so I've compiled all the posts in chronological order so you can get the story the correct sequence. Thanks for all the nice comments, responses, and corrections! Click on the gray titles for the post.

On the Road in the Pacific Northwest: The introduction and overview of the new blog series.

Following the Cascadia Subduction Zone on Highway 101: This post provided the geological background for understanding the hazards of living in the lands influenced by the Cascadia Subduction Zone.

In This Land of the Sasquatch There are Ancient Giants: The first leg of our journey took us through the range of the California Redwoods and the land of black bears that look suspiciously like walking ape-people.

The End is Coming (of the Cascadia Subduction Zone): The end of Cascadia is a slow process, but the zone is disappearing slowly, being replaced by the San Andreas fault. It's also a look at one of the loneliest beaches in California.

A Geologist Walks Onto a Bar in Cascadia: Exploring the unique baymouth bars along the Humboldt county coast.

Northern California's Tsunami Central: Crescent City has a tragic history of tsunamis, especially the one in 1964 that took a dozen lives and destroyed the marina and downtown areas.

This "Dismal Forest Prison" and other problems exploring the Northwest: The Pacific Northwest was particularly difficult to explore and map, at least if you weren't part of the indigenous culture. Here are some accounts of the discovery of Humboldt Bay by land.

Into the Land of Sand, and Exploding Whales: Between Coos Bay and Florence, Oregon, is the longest stretch of sand beaches and dunes in the Pacific Northwest. Yeah, and the whale thing...

Into the Realm of the Devil (and Sea Lions): There are a lot of things named for the devil on the Oregon coast for some reason. And some incredible sea caves occupied by sea lions.

Putting on a Happy Face at Dismal Nitch and Cape Disappointment: We reach the mouth of the Columbia River, where Lewis and Clark reached their goal. It's undergone a great many changes over the years.

Into the Rainforest, Seeing Something Strange...Rain: We explore the Hoh Rainforest in Olympic National Park for the first time, and encounter something strange, at least this year: rain. There was also a fire burning in the rainforest. That's not normal.

The Diverse Landscapes of Olympic National Park: Olympic is one of the most diverse of our national parks, with alpine glaciers, rainforests, and coastlines. It's spectacular.

The Salish Sea and the Strait of Juan de Fuca: Glaciers and tectonics combined to form a seaway east of Vancouver Island and the Olympic Peninsula. It's a unique ecosystem quite distinct from the Pacific Ocean just a few miles away.

Stone Rings, Glaciers, and "Dinosaurs" on the Coast of the Salish Sea: Desecrated burial mounds, avian dinosaurs, and glacial landscapes. Victoria on Vancouver is both a beautiful city and a fascinating place to explore.

Exploring North America's Southernmost Fjord: We take the ferry to the mainland, making landfall inside of the southernmost glacial fjord in North America, Howe Sound in British Columbia (defined here as on the mainland, but connected to the ocean; opinions differ!).

Landing Place of the Thunderbird and the Grimy One, the Volcanoes of British Columbia: Black Tusk and Mt. Garibaldi two of the northernmost volcanoes in the Cascade Range. I missed them last year in the rain, but saw them this time.

Controversial Stone People, Fire and Ice, and an Olympic Legacy: We made it to Whistler and the home of the 2010 Winter Olympics. The stone people were controversial, but the scenery was not. It was spectacular.

Seeing Volcanoes from the Inside Out at Siám' Smánit (Stawamus Chief): Glaciers and granite! Stawamus Chief is a dramatic granitic dome rising high above the end of Howe Sound. It was once the magma chamber of a volcano.

Our Tour of the Greatest National Park I Never Once Set Foot In: North Cascades National Park is a true primeval wilderness. No roads penetrate the park boundaries. But what incredible scenery!

The Geology that Explains Why North Cascades is a Park Divided: The Skagit River may be the most altered water course in the Pacific Northwest, but it provides 20% of Seattle's electricity. It splits a national park in two.

What's East of North (Cascades), A Brief Explore: North Cascades doesn't have all the scenery; the lands to the east are rather spectacular too, and offer some great geology.

Playing Hide and Seek with a Sleeping Monster: Mt. Baker is not the most active volcano in the Cascade Range, but it is capable of great mayhem. It even looked for awhile like it might blow back in 1975.


Danger Follows Us Home (As it does all of us): A Mt. Shasta drive-by (photo) shooting, and a wrap-up of the series. Danger is always with us no matter where we are. It's not to be feared, but respected and prepared for.

Vagabonding on Dangerous Ground: Controversial Stone People, Fire and Ice, and an Olympic Legacy

A stone person stands on an outcrop up in Callaghan Creek a few kilometers west of Whistler in British Columbia. It has been called an inuksuk, although inunnguaq may be the more proper name (it's the difference between "something which acts for or performs the function of a person" and "imitation of a person"). The far north can be a featureless landscape with little in the way of landmarks, so the First Nation people like the Inuit used stone cairns for navigation and travel routes, and as signs for fishing sites, camps, hunting grounds, or places of spiritual importance. It is unclear if the human forms, the inunnguat (the plural form of the word), were used much prior to European colonization.

We were in Whistler, British Columbia, on our recent vagabonding adventure through the lands influenced by the Cascadia Subduction Zone, a place you may remember as the site of the 2010 Winter Olympics. Reminders were all over the place, including the rings and stage in the center of town. The slopes are covered with ski runs, and the highway from the coast, which we mentioned in a previous post, was widened and straightened, despite the ongoing threat of mass wasting.

The inunnguaq stood at the entrance to the Olympic venue in Callaghan Creek where the ski jump and biathlon events were held, and indeed, an inunnguaq was used as the symbol for the games in general. Now, I've loved the symbolism of the inunnguaq, and lots of my souvenirs of Canada include the image. But I've come to understand that it was of some concern to the First Nations people of Canada. It could be considered a sign of respect for the original people of Canada, but it could also be interpreted as a bit of cultural appropriation.

Some noted that the actual historical inuksuit (plural) rarely if ever took a human form. That practice may have not begun, as noted above, until European colonization. Others argued that the inuksuit were used by arctic First Nation peoples, whose lands were hundreds, even thousands of miles away from the Olympics site. I can see this as being the same as using a tepee as a symbol for the Los Angeles Olympics even though tepees were used by nations on the Great Plains, a thousand miles or more away. It's conceivable that a better symbol might have been a Thunderbird, a cultural icon of the Coast Salish people, especially since two prominent volcanic peaks in the Whistler area were seen as the perch for the animal (the Black Tusk, and Mt. Cayley, discussed below). Now, I'm no sociologist or anthropologist, and I certainly don't live in the region, so I'd love to hear some perspectives from those who are close to the issue.

But I loved seeing the ski jump! I've never seen one before in person, and I can say without any doubt whatsoever that you will never see me wearing skis on something like this. It is steeper than it looks, and I grew up watching that iconic crash from ABC's Wide World of Sports (the "agony of defeat"). It's still in use for training, but obviously not this time of year.

I would love to say that I fully research the landscapes that I explore beforehand, but this was vagabonding. I didn't know, other than a vague goal of reaching Canada, that we would make it as far as Whistler, and so I didn't look into the geology of Callaghan Creek where the Olympic venue was located. It turns out that the reach of Cascadia is more than I realized. There are several lesser-known, but potentially active volcanic centers to the north of Garibaldi. These include the Bridge River Cones, Mt. Meager, possible the Silverthrone Caldera, and across the valley from me at that moment, the Mt. Cayley Volcanic Field.

Source: "Garibaldi Volcanic Belt-en" by © Sémhur / Wikimedia Commons. Licensed under FAL via Commons - https://commons.wikimedia.org/wiki/File:Garibaldi_Volcanic_Belt-en.svg#/media/File:Garibaldi_Volcanic_Belt-en.svg

The main peaks of the volcanic field were hidden in the clouds (now there's a Pacific Northwest surprise), but we could see some of the glaciers that have formed on the flanks. The Mt. Cayley field has not erupted in some time, maybe 200,000 years, but hot springs and earthquake activity indicate the presence of magma beneath the complex. The Mt. Meagher field to the north erupted just 2,400 years ago.

The glacier between Metal Dome and Brandywine Mountain shows the state of the drought conditions this year and the ongoing loss of glacial ice in general from global warming. It was July, a time when a fair amount of snow should still cling to the peaks, but most of the ice visible is a dirty gray color. The gray is the old glacier ice, no longer hidden and protected by an insulating blanket of white snow. So the melting that is taking place is from the glacier itself, and these glaciers have been receding at an accelerating pace for decades now.

There weren't a lot of flowers out and about, but there were some beautiful ones here and there. No, I don't know many flower names. I'm a geologist, after all. They cover rocks.

There are a number of wonderful waterfalls in the area, the delightful results of volcanism and glaciation. Alexander Falls are just off the road in the Callaghan Valley downstream of the Olympic park.

Brandywine Falls are on the main Sea to Sky highway at Brandywine Falls Provincial Park. The 70 meter (200 foot) waterfall flows over the lip of a basalt lava outcrop. The falls are migrating upstream. The rock beneath the lip of the falls is softer and more easily eroded, so it is constantly wearing away and undercutting the cliff. Niagara Falls is migrating in the same manner.

We continued down the Sea to Sky Highway (Sky to Sea?), and saw some more incredible geology. It's coming in the next post...