1:35 You have made my day! I went over on the ferry from Coupeville in 2002 and was stunned by the evidence in the cliffs you show. The material baffled me completely. When I saw the same over in the NE5 area of Oak Harbor I wondered what the heck had caused it and now I know :-) For over 20 years I have been trying to imagine what sort of 'sudden' catastrophe could have caused it. Well silly me and Well Done You! :-)
FANTASTIC prep video for the GSOC field trip in September! Loved the "Whidby Formation", as I was born in Whidby Island in 1948, which was just slightly too late to witness the creation of this "Whidby Formation", but just the right time for the "Wesley formation"!
This was wonderful. I saw some old photos of PT where they were cutting into the "wall" to make the downtown fill. As a resident, I'm really concerned about it all turning to jelly in case of an earthquake. To say nothing of the bluffs coming down as well. There are now some very real concerns about bluffs on the entry to the old downtown having slides. Apparently there's a huge difference between where the bluffs approaching downtown were in 1982 when they filmed "An Officer and a Gentleman" here in PT and where these bluffs are now. I don't know if you're local, but if you are, and if you see that movie and can make a judgment on the loud of the bluffs, I'd be really interested in what you have to say.
The state and city have done some wonderful analyses on slope stability around there. The loose nature of that cliff material is definitely something they’re concerned about.
Great video, Andrew! I live at Discovery Bay near Port Townsend and learned a lot from your video. I was a geography professor for thirty two years and had some background. Tectonic uplift after glaciation which is crucial for the uptown area of Port Townsend is often not discussed in this country as much as in Europe and the Baltic Sea area. Thanks again for your efforts and succinct explanation.
Hey Andrew, just wanted to say thanks for making captions! I watch everything with captions and it makes it easier to follow. Keep up the work, great job!
Great that a geology fan from England discovered this. Andrew has the skill to popularize geology for the average layman. I think he's going to be pretty famous in a few years! I lived in south London and West Sussex for almost 20 years, and I wish I had paid more attention to the surrounding geology at the time I lived there.
Hey Andrew, excited to have found your channel. Great video, here. I clicked the sub button and you turned 1K! Congrats on that. I'm going to go through your content and binge now.
The Vashon was a sub-period of the Fraser glacial period, which lasted from about 30,000-10,000 years ago. Prior to the Fraser glaciation was the Possession glaciation, about 80,000-60,000 years ago. Check out this great chronology of glacial periods from the Washington DNR: www.dnr.wa.gov/programs-and-services/geology/glaciers#the-cordilleran-ice-sheet.1
Do you know anything about the coal / peet deposits on the cliffs between point wilson and north beach? They are closer to point wilson in an area that is impassable at high tide.
I don’t think I’ve seen those specifically, but there are a good number of similar deposits around North Beach. Hard to say exactly what the cause is, but I think some of it is due to uplift caused by rebound after the glacier melted. Some parts of the Salish Sea area are rising by nearly a centimeter per year even 15,000 years later!
zigg stah ~ No but with the tsunami following shortly it really won't matter. The highest hill in town is Morgan Hill and it's only 400 feet above sea level. Water used to flow from N Beach to PT Bay and it will then, when it hits. If you can't get up to the other side, up the S curve and past Sheridan you won't make it at all. IF or when the Cascadia goes. Am I right?
Thank you Andrew!
Great information on an interesting topic!
nice job.
Excellent video
Thank you
Thank YOU!
You do a fantastic job of explaining exactly what you're seeing. You could be the next geologist Bill Nye.
Thank you!
Fascinating video. Siletzia is new to me, I'll have to check into it more. Thanks for posting.
There’s a lot of interesting stuff there. Some complicated things happen when you squeeze a giant island onto a continent!
Wonderful video!!
Thank you!
Good job! Enjoyed it!
Thank you!
Professional presentation, ty!
Thanks!
Very cool!
Thanks!
1:35 You have made my day! I went over on the ferry from Coupeville in 2002 and was stunned by the evidence in the cliffs you show. The material baffled me completely. When I saw the same over in the NE5 area of Oak Harbor I wondered what the heck had caused it and now I know :-) For over 20 years I have been trying to imagine what sort of 'sudden' catastrophe could have caused it. Well silly me and Well Done You! :-)
Glad I could illuminate!
FANTASTIC prep video for the GSOC field trip in September! Loved the "Whidby Formation", as I was born in Whidby Island in 1948, which was just slightly too late to witness the creation of this "Whidby Formation", but just the right time for the "Wesley formation"!
"Stolen imported Canadian rock" lol 😂
This was wonderful. I saw some old photos of PT where they were cutting into the "wall" to make the downtown fill. As a resident, I'm really concerned about it all turning to jelly in case of an earthquake. To say nothing of the bluffs coming down as well.
There are now some very real concerns about bluffs on the entry to the old downtown having slides. Apparently there's a huge difference between where the bluffs approaching downtown were in 1982 when they filmed "An Officer and a Gentleman" here in PT and where these bluffs are now.
I don't know if you're local, but if you are, and if you see that movie and can make a judgment on the loud of the bluffs, I'd be really interested in what you have to say.
The state and city have done some wonderful analyses on slope stability around there. The loose nature of that cliff material is definitely something they’re concerned about.
Great video, Andrew! I live at Discovery Bay near Port Townsend and learned a lot from your video. I was a geography professor for thirty two years and had some background. Tectonic uplift after glaciation which is crucial for the uptown area of Port Townsend is often not discussed in this country as much as in Europe and the Baltic Sea area. Thanks again for your efforts and succinct explanation.
Hey Andrew, just wanted to say thanks for making captions! I watch everything with captions and it makes it easier to follow. Keep up the work, great job!
Happy to help!
Really interesting. Learned a lot. Cheers from England.
Thanks!
Great that a geology fan from England discovered this. Andrew has the skill to popularize geology for the average layman. I think he's going to be pretty famous in a few years! I lived in south London and West Sussex for almost 20 years, and I wish I had paid more attention to the surrounding geology at the time I lived there.
Geology is fascinating. Just a hint for future videos, Juan De Fuca is Few Ka in pronunciation. Not foo ia.
Hey Andrew, excited to have found your channel. Great video, here. I clicked the sub button and you turned 1K! Congrats on that. I'm going to go through your content and binge now.
Thanks! Happy to have you as my 1000th subscriber!
Great geology video - I subbed and plan to binge watch your other videos!
Thank you!
what is the name of the glaciation prior to the vashon???
The Vashon was a sub-period of the Fraser glacial period, which lasted from about 30,000-10,000 years ago. Prior to the Fraser glaciation was the Possession glaciation, about 80,000-60,000 years ago. Check out this great chronology of glacial periods from the Washington DNR:
www.dnr.wa.gov/programs-and-services/geology/glaciers#the-cordilleran-ice-sheet.1
Thank you Andrew that is exactly what I was looking for!!!@@BetterGeology
Do you know anything about the coal / peet deposits on the cliffs between point wilson and north beach? They are closer to point wilson in an area that is impassable at high tide.
I don’t think I’ve seen those specifically, but there are a good number of similar deposits around North Beach. Hard to say exactly what the cause is, but I think some of it is due to uplift caused by rebound after the glacier melted. Some parts of the Salish Sea area are rising by nearly a centimeter per year even 15,000 years later!
That last bit of info doesnt bode well for liquefaction during a Cascadia rip
Washington Department of Natural Resources has lots of great liquefaction information on its website.
zigg stah ~
No but with the tsunami following shortly it really won't matter. The highest hill in town is Morgan Hill and it's only 400 feet above sea level. Water used to flow from N Beach to PT Bay and it will then, when it hits. If you can't get up to the other side, up the S curve and past Sheridan you won't make it at all. IF or when the Cascadia goes. Am I right?
@@laswan5 Dont forget subsidence like they did in Japan