Thursday, August 20, 2020

Update on A Newly Exposed Trackway Along the Bright Angel Trail in Grand Canyon

Artists rendition of how the new trackway was created (Figure 8 in the paper). Art by Emily Waldman.

I have posted a second addendum to my original post from December 11, 2016. A new paper describes this trackway in detail! See the addendum here.

CNN also picked up the story here.

Monday, August 17, 2020

Jellyfish Sprite Captured by Camera in Texas

 McDonald Observatory

On rare summer nights, ethereal forms leap into the skies above distant thunderstorms. Alien invaders? Not quite: it's a jellyfish sprite, an extremely brief and rarely captured event associated with incredibly powerful lightning strikes. This event lasted less than 1/30th of a second and occurred above a powerful storm about 100 miles away as seen from McDonald Observatory on July 2nd, 2020. 

Image Credit: Stephen Hummel

Tuesday, July 28, 2020

Images from Curiosity on Mars

The Mars rover, Curiosity, has been roaming the Gale Crater for 8 years - it was only supposed to be operating for 2 years. This ten minute video is amazing! They have taken thousands of images and spliced them together to make it look like a video. Outstanding !

Watch here.

I understand that if folks are not in tune with desert landscapes that the video may appear bleak. However, looking at an alien planet ironically brings life to the images. Geologically, we see the similarities between our home planet and the Red Planet - sand dunes, limestone, tilted strata, sandstone, and skylines. Try not to let the barren nature of this "other world" taint your appreciation of the wonders of the solar system of which we are finally beginning to understand more deeply.

Self portrait of the Curiosity rover. I support interplanetary exploration!

Friday, July 03, 2020

Remembering Hugh and Ruth Downs - Fellow Travelers to Earth's North Pole, 1998

From left to right, Hugh Downs, Ruth Downs, Herbergers, and Buzz Aldrin.

You may have heard that Hugh Downs, longtime TV personality at NBC and ABC, passed away on July 1, 2020. His obituary was published by the New York Times on July 2. I was fortunate to travel with Hugh Downs, his wife Ruth, and their friend and colleague Buzz Aldrin to the North Pole in July, 1998. He was filming a segment of the ABC program "20/20." Mr. Downs had previously filmed a 20/20 segment at the Amundsen-Scott South Pole Station in Antarctica and wanted to round out his "far-ends-of-the-earth" résumé by filming a segment at the opposite end of the earth.

In a previous blog posting celebrating the Centennial of statehood in Arizona, I included a picture taken with the Downs' and Buzz Aldrin at the North Pole. The link to that posting can be found here. We were traveling by nuclear-powered ice breaker on the Sovietsky Soyuz through Arctic ice on a 14-day expedition. I was working onboard as a geologic lecturer for TCS World Travel on the trip. 

Ruth (Shaheen) Downs passed away in 2017 and her obituary can be read here. She was a very gracious person on our voyage and Hugh credited her with much of his success. Ruth was quite successful in her own right and I want to remember her passing as well, since she likely escaped much of the limelight when she passed in 2017. They were together for 75 years!

On our voyage, I found Hugh Downs to be an excellent listener, curious, and gracious to all of the passengers on the trip. The well-known Herberger family of Phoenix were also along and our group formed a sort of Arizona contingent on the trip.

I tried to find a link to the 20/20 segment that was filmed at the North Pole, with no luck. If any readers have such luck - send me the link and I will include it here.

Tuesday, June 30, 2020

Meanders, Oxbows, and Time

My colleague, Brad Dimock, sent along a link recently that I know you will find interesting. It involves a cartoon graphic that shows the way mature rivers meander and evolve through time. You will see meanders turn into oxbow lakes that are cut-off from the main stem, then fill with sediment. You will see point bars grow as meander loops arch outwards. You could look a this for a half hour and not see enough. The site was constructed by Robert Hodgin. Watch it here. Thanks Brad!

Here are photos I took of the upper Amazon River near Iquitos Peru in September, 2009. You can easily see the meanders and oxbow lakes. Imagine that these are migrating and moving just like in the graphic above, but on a much slower pace. 

Saturday, June 20, 2020

Why no blogs...?

Palisades of the Desert from the Colorado River, September 17, 2013
I think everyone will agree it has been a difficult few months. While I weathered the pandemic and its consequent isolation fairly well in March, April, and May, I seemed to falter a bit in June. I miss traveling. I miss lecturing. I miss being on the river looking at the Grand Canyon. I know it is difficult for many of us right now. But we have to keep in mind that we, as a species, aren't calling the shots right now. That can be difficult for some - to admit that we are helpless against nature. But why should we be against nature. No matter how difficult it is for the both of us here, we are doing what we can to limit the spread of the virus. We do it for us. And we do it for others. It has been especially hard on my wife not seeing the children or grandchildren. But we want to be good citizens.

There are really two reasons why I have not been blogging since the end of May. The first is that there is nothing to say. I haven't been anywhere, haven't done anything. So why force it. I can take a break - I hope you will stick with me until we come out on the other side. The second reason is that I have been working on a project. I am a co-author on an upcoming geologic river guide for the Grand Canyon. Since the end of April, I have been plugging away at the keys of my computer, transferring my river observations into readable text. A sample spread is included below. There will be a geologic map on one half of each spread and a mile-by-mile description on the other half. My co-author is Dr. Ryan Crow at the USGS here in Flagstaff and the book will be published by them. I am excited to be working with Ryan - he has researched the lava fields found in western Grand Canyon and brings great expertise to the project.

I am hoping the guide will be ready for the 2021 river season. For that to happen, I will have to take significant time away from blogging and dedicate that time to finishing the guidebook. I will try to post something now and then from previous trips, and I may even dip into my vast collection of photographic slides from days long before this blog existed. There are some good ones. But right now I need to focus on the book and maintain some sanity during the necessary isolation.

Just letting you all know there may be less blogging through the summer. My enthusiasm for travel, geology, landscapes, and exploration remains high. Thanks for your understanding.

Saturday, May 16, 2020

Cratering - Marking the 40th Anniversary of the Mt. St. Helens Eruption

Photomural image by Richard Gordon Bowen, May 18, 1980. Courtesy of the Bowen Family.
May 18, 1980. If most people remember this date at all, they will recall it was the sunny morning that Mt. St. Helen's in southwest Washington's Cascade Mountains let loose with a powerful blast that tragically killed 57 people. The 40th anniversary of that eruption is this Monday, May 18. I found out about the blast upon ending a river trip in the Grand Canyon. But first...

... The Portland Art Museum is sponsoring an exhibit to commemorate this historic geologic event. I learned of the exhibit, now viewable virtually and online, through my friend Dixie Watkins and his wife Elaine. They sent me a link that will take you on this virtual tour, which is outstanding! This is the preamble to the exhibit and tour:

"The Portland Art Museum proudly presents this tribute to Mount St. Helens on the fortieth anniversary of the eruptions of 1980. Spanning the period from 1845 to the present, this exhibition is the first survey of works of art inspired by the mountain. Although 175 years is barely a blip in geologic time, the art bears witness to an extraordinary era in the long, cyclical life of the volcano. The beauty of Mount St. Helens has ranged from bucolic to savage. Before the eruptions, painters delighted in depicting its pleasing conical shape rising high above the verdant landscape. The 1980 eruptions challenged artists to capture the thrilling and terrifying displays of nature’s sublime power. When the smoke cleared, the new apocalyptic face of Mount St. Helens compelled the depiction of its haunting majesty. Since then, the rapid return of life to the mountain has captured the attention of photographers as well as scientists from many fields. Although the volcano seems to have reclaimed its serenity, some artists have begun to look to the future. Mount St. Helens will erupt again. We are pleased to welcome you to this celebration of a great wonder on our horizon."

*** You can view the virtual exhibit at this link:***
Paul Kane, 1810–1871) Mount St. Helens, 1849–1856. Oil on canvas. Royal Ontario Museum, Toronto
I remember the day 40 years ago. I was rowing for the very first time a raft down the Grand Canyon. It was a US Geological Survey research trip with veteran geologist Don Elston leading the way. Don was studying remnant paleo-magnetism recorded in some of Grand Canyon's rocks and he conducted river trips to access the sites. Before this trip began, he was short one boatman - and in the final moments before the trip began.

Don had open heart surgery just six months before this trip, which was to be his first since his operation. He was excited and perhaps just a bit anxious about the trip. His wife Shirley and nephew Charlie were on the trip as well.
Gary Mercado, a fellow geology student with me at Northern Arizona University, had previously rowed boats for Don in these studies. But just before the trip began, Gary received word that he got a job with the USGS in Denver. We had both just recently graduated with geology degrees the week before the trip began but now Gary needed to decline his previous commitment to row this trip. Luckily for me, he asked if I was interested in being his replacement. I jumped at the opportunity, not giving it a whole lot of forethought. In those days, I said yes to anything that sounded good, oftentimes not thinking it through (like the one and only time I jumped out of an airplane in 1976).
Gary put me in touch with Don Elston and before I knew it I was rowing a boat down the Grand Canyon!

Up to this point I had only been a passenger on the river in Grand Canyon and that was just half of a trip from Phantom Ranch on down. Like everyone else back then, you learned by doing - just get in the row seat and go. Do what I do. So after the trip started and we would scout a rapid, people would ask me what that particular rapid in Marble Canyon looked like. Not wanting to appear inexperienced, I quickly came up with the honest, but incomplete answer, that, "I've never seen this rapid at this level of water." It seemed to work. (Although to this day I'm sure many of those intelligent folks figured out that I was the new guy. I was so scared from the get go and I made too many mistakes. But I was thrilled for the opportunity to row a boat and there were so many big name geologists that were along on the trip. I remember one - Max Crittenden, one of the first geologists to ever describe metamorphic core complexes. There were others whose names I have now forgotten.

Many interesting events happened on this trip. This was the year that Glen Canyon Dam filled the Powell reservoir for the first time so there was 30,000 cfs coming down the river. It was HUGE! I was rowing a very large 22' snout boat with 12-foot oars. As skinny as I was in those days, and with no prior rowing experience, I couldn't really control the boat. One day, camp was to be made at the Clear Creek beach but I missed the pull in. Don wanted to walk up to the horizontal waterfall and look at some rocks there. It was late in the day we were to camp there. But because I missed the pull-in, we had to continue down to Phantom Ranch.

There was no way to camp there for river parties but we did take time walk up to the Ranch so Don could make a phone call. While we were there, I encountered my old Park Service boss, who was giving an orientation tour of the Ranch to the brand new Superintendent of the Park, Dick Marks. I was not on good terms with my old boss and as the formalities were exchanged between the various members of our group, I eyed my ex-boss warily, as he did me.

We left Phantom but it was too late to go vary far, so we had to find a camp fast. We stopped just a few hundred meters downstream on a cobble beach just across from the River Trail. It was illegal for river parties to camp there in those days but we really had no other choice. It was getting dark and Horn Creek Rapid loomed ahead just two miles. While we setting up camp, wouldn't you know it, the two rangers we saw at Phantom Ranch were hiking up to Indian Garden on the River Trail and stopped across the way to look at our camp. They knew who we were. When the trip was over, Don received a citation in the mail from Grand Canyon National Park for illegal camping. For years afterwards, Don always joked that the citation was labeled "Department of the Interior vs. Department of the Interior".

A few days later, I got into an eddy I could not row out of. It was just above Tapeats Creek. Round and round we went for at least 20 minutes and I became thoroughly exhausted. Finally, one of the younger geologists in my boat stepped in next to me and we each took one oar and finally made it out. Man that was big water!

Albert Bierstadt (American, born Germany, 1830–1902). Mount St. Helens, Columbia River, Oregon, 1889. 
Oil on canvas. Collection of L.D. "Brink" Brinkman, LDB Corp, Kerrville, TX

On May 18, 1980, the day that Mt. St. Helen's blew its top, we were blissfully unaware of it and getting ready for our run of Lava Falls Rapid, the biggest, meanest rapid in the whole canyon. To say I was scared to run this monster for the first time would not convey in a proper way how I felt. I was terrified. And apparently, Don had a history with this rapid that caused his wife Shirley to begin to fret as much as me. While we scouted the rapid, it was determined that Shirley would ride with me on the biggest boat, and Don's nephew,Charlie would ride in the smaller boat with him. Remember, this was just six months after Don's open heart surgery.

Finally, I got in my boat. I was hyperventilating as I pulled away from shore and entered the tongue of the rapid. I guess I was lucky to have such a large craft but one still needs to bee spot-ion for the entry through the tongue. And myriad swirling currents play havoc on smaller boats in there. I remember very little about the specific run I made. Someone on shore took a movie picture of it and I have a copy of that somewhere. But it must have been a good run because I don't remember it! At the foot of the rapid I had a hard time stopping but eventually pulled over on the left bank below Prospect Spring. We couldn't see the rapid from there but waited for the other boats in our party to come down.

As we bobbed in the eddy below the spring, time seemed to drag on forever. Where were they? Before long, Shirley started to worry that no one was coming down. "Where is Don," she repeated. I tried to comfort her as best as I could. But I started to worry as well. Shirley hadn't wanted Don to row this trip so soon after his surgery and wanted to be on the trip with him. She worried audibly that something bad had happened. I tried to calm her down.

Meanwhile, up north, Mt. St. Helens was roaring with its gigantic blast. We would not find out until the trip was over what happened, although we were all talking about it on the trip, as it had been rumbling for months. All geologists back then were excited about what might happen with the volcano.

Finally, we saw something coming down the river. It was an ice chest bobbing in the water. Uh-oh. Something else came along just after that - a life jacket! Oh no, that's not good. Shirley started to cry. I immediately pulled out into the current of the river to be of assistance anyway I could. Just by chance at that time Don came by my boat bobbing in the water. Charlie was very close to him trying to reach him in case he needed help. I pulled them both into my boat as we began to go through Son of Lava Rapid. Someone in another boat wrangled his boat ashore. He had misplaced his position in the tongue of the rapid, the swirling currents grabbed his keel and he ran right over the ledge hole! No man's land!

Forever afterwards, Shirley Elston thought of me as the one who saved her husbands' life. For the rest of our friendship, spanning many decades, I could do no wrong. She and Don took that day at Lava Falls all the way to their graves and I was honored to be invited to Don's memorial. I remain forever grateful to them both in giving me the chance to be a boatman in Grand Canyon.

Look at the online exhibit and remember Mt. St. Helens 40 years on!

Frank Gohlke (American, born 1942). Aerial view: Landslide—debris flow area—looking east toward Spirit Lake, 
5 miles north of Mount St. Helens, 1982; printed 2005. Gelatin silver print. Courtesy of Artist and Gallery Luisotti