I am hooked on geology! I am a retired Canadian electrical engineer, 81 and love to watch youtube videos. I am omnivorous, from philosophy to engineering. I now watch Prof Zentner's videos.

Nick, one of your top 5 episodes ever. Skye Cooley is a total natural in front of the camera. Almost as good as yourself!! I could listen him again and again, should you choose to feature him again! You two could do a stand up geology comedy show. I'm laughing as I watch!

Thanks for the fun day, Nick. I'll read through the comments and post responses on my website (listed in video description), if that's alright with you.

Excellent camera work, Nick. I had never heard of clastic dikes, so this was really great. Thanks.

Memories of drives Grandma would take us on: stopping by road-way cuts, she pointing out this feature and that.

The weight of the flood water could have asserted extreme pressure on the underlying formations, potentially causing distributed stress cracking through the depression of the vast areas being flooded. Water weighs roughly 8.34 pounds / gallon. Multiplied by millions of gallons suddenly surging through an area, that’s a tremendous weight for underlying formations to bear, each with its own existing structural defects.

Floods shaking the earth so hard it selectively causes cracks. It's insane. Everything about Washington is insane, Gotta Love It!

This was so interesting Nick! We really liked Skye, AND we could hear what he was saying!! Loved that notebook too. Thanks for a great show.

Thank you for featuring Skye Cooley and his passion for Geology while he is sharing the "fever" for exploring all those dikes, incredible!

As a mining engineer, I understand the fracture/proppant/fluid-injection model. Correlating it with clastic dikes is brilliant. I liked the filter-cake description for the 'skin' too. It's good evidence the fracture/slurry penetrated dry sediment as you can't de-water using wet sediment.

i had to google the term clastic dike after watching just a little bit because i was lost after clicking " play ", i chose to watch this because i thoiught it was a dike to hold back a river or ocean from flooding, but the video taught me a new subject that is very interesting, after viewing some images of clastic dikes i came acroos an image from an alaska dike where a huge intrusion of a dark rockish material split light greay rock on either side of the dark intrusions of the dark rock, it was amazing to learn about this, it reminded me of watching a documentary of the great lakes horizontal rock formations where curves were caused by stress from glaciers i suppose, i am not a geologist as you can tell, but thank you for posting, the subject is very interesting and the video very entertaining for an hour of relaxing learning

Now I need to start hunting for clastic dikes when I am exploring. :). Great episode. I enjoy listening to Skye. He is really exited about his project.

Oh the geologist has a huge heart! Thank you for introducing professor Cooley!

I'm an Aussie that visited WA state briefly in 2011/2012. I was staggered by the range of geologic formation and scenery.

Nothing like a hard work day, cracking a beer, and joining you guys. Fun! Your joking around and enthusiasm is just great. And puzzling over why and how gets us all involved. Again, thanks!

Wow! I encountered some clastic dikes in central Ontario, Canada during my first field camp in my undergrad... they were the meme of the trip. Those ones were Paleoproterozoic in age, about 2.3 billion years old, so a good bit older than these. Shockingly undeformed despite their age.

Another great one Nick or Ned or whoever. I particularly like the defense of his top down theory for dike formation as well as tying it to ice age floods as opposed to seismic events. The techniques that he uses to characterize these features is also very useful for understanding how science is done. That to me is important when teaching science. When presented with a problem it is key to be able to break up and dissect that problem and be able to characterize the phenomena with data from a variety of sites. His work and thinking shows that process very clearly. Thanks again.

Hey.... I truly AM super turned on by ALL this ...and I am just a 63 year old grandma working from home...

This one caught me by surprise. I am learning soooo much and the level of teaching and analysis and discussion of various theories in this episode was just perfect. Dang, it was just good. Thanks!

Thanks for taking us townies along.