Rob, these are all enjoyable, informative and increasingly polished videos. You inspire me to start a series on the Appalachia in Virginia as soon as I retire. So much to see and so little time. Anyway… these are much appreciated and my students at the University of Richmond love the ones I’ve shown in class. Give us more!
Thanks - and yes - go for it... it would be great to see a series on Appalachia! I've got a few more Alpine ones in the pipe-line.... Thanks for the feedback!
This is such fantastic and complex geology and the story is beautifully told ... I've convinced Mrs Johnston that we have to go next summer and she can can have wine and cheese whilst I go and wrap my head around these terrific turbidites - We've got form though - the Troodos was a great trip whilst Mrs J enjoyed the delights of Paphos I wandered the Troodos.
Nice Work! Id love to see you discuss more of the petrology in the intrusions you showed on the coast before! Your hand mapping videos are a treat too!
The last views of the mountain tops are so beautiful, makes me want to go there. The recent large Christchurch NZ earthquake created an underwater landslide and the turbite flow travelled a thousand klms up the Pacific trench where the Silt replenished life on the once barren ocean floor.
Yes - and its not judst the silt (and sand) - turbidity flows originating in shallow water will also carry the fauna residing in the shallow sea bed into the depths...
Ive got about 300 days riding that lift in La Grave. Super interesting to connect the dots of the rocks ive been looking at all these years. Ive tried google many times but always ended up confused and none the wiser..and im supposed to be a geologist😂
Thanks - glad it helped! Have you tried Maurice Gidon's Geol-Alp website - at least to get an idea of what rocks are where.... an excellent resource... though it doesn't simplify things..... You could try my video "Structural inheritance - basement in the external Alps" which covers the immediate geology of the Ecrins (a bit)....
Thanks for the question. Folding can happen under almost any thermal conditions in sediment systems.... I've seen examples of large near-isoclinal folds in strata that deformed on the seabed...
Thanks Rob. My amateur take on parts 1 & 2. Upper bed, south, thin confined channel structure, at a now relative low elevation. North, toward bed termination, thick fans of as yet undetermined width, and true extent, thrust up atop basement, and colliding with Eurasian plate, contributing to forming European Alps in general. What accounts for the folding and deformation? Were the sand beds ductile enough to fold during thrusting, (possibly over-riding)? Were they deeply buried and subject to high temperature at some point. The Sedimentary Logs are great. They really show how much more work is ahead.
Thanks for your reflections and questions. Deformation - the folding probably initiated while just below sea bed, as the Alpine orogen continued to evolve. Folding doesn't need great depth/temperature... certainly in sedimentary rocks like this. Folds can happen in even unconsolidated sand -mud successions (slump systems).
Rob, these are all enjoyable, informative and increasingly polished videos. You inspire me to start a series on the Appalachia in Virginia as soon as I retire. So much to see and so little time. Anyway… these are much appreciated and my students at the University of Richmond love the ones I’ve shown in class. Give us more!
Thanks - and yes - go for it... it would be great to see a series on Appalachia! I've got a few more Alpine ones in the pipe-line.... Thanks for the feedback!
This is such fantastic and complex geology and the story is beautifully told ... I've convinced Mrs Johnston that we have to go next summer and she can can have wine and cheese whilst I go and wrap my head around these terrific turbidites - We've got form though - the Troodos was a great trip whilst Mrs J enjoyed the delights of Paphos I wandered the Troodos.
Plenty of good wine and cheese available!
Nice Work! Id love to see you discuss more of the petrology in the intrusions you showed on the coast before! Your hand mapping videos are a treat too!
Thanks - no plans at the moment for petrology videos... but you never know! A bunch more Alpine ones to come yet!
The last views of the mountain tops are so beautiful, makes me want to go there. The recent large Christchurch NZ earthquake created an underwater landslide and the turbite flow travelled a thousand klms up the Pacific trench where the Silt replenished life on the once barren ocean floor.
Yes - and its not judst the silt (and sand) - turbidity flows originating in shallow water will also carry the fauna residing in the shallow sea bed into the depths...
Ive got about 300 days riding that lift in La Grave. Super interesting to connect the dots of the rocks ive been looking at all these years. Ive tried google many times but always ended up confused and none the wiser..and im supposed to be a geologist😂
Thanks - glad it helped! Have you tried Maurice Gidon's Geol-Alp website - at least to get an idea of what rocks are where.... an excellent resource... though it doesn't simplify things..... You could try my video "Structural inheritance - basement in the external Alps" which covers the immediate geology of the Ecrins (a bit)....
Thanks a lot. These two videos make me think whether in relatively cold conditions such sedimentary had been being folded.
Thanks for the question. Folding can happen under almost any thermal conditions in sediment systems.... I've seen examples of large near-isoclinal folds in strata that deformed on the seabed...
Thanks Rob. My amateur take on parts 1 & 2. Upper bed, south, thin confined channel structure, at a now relative low elevation. North, toward bed termination, thick fans of as yet undetermined width, and true extent, thrust up atop basement, and colliding with Eurasian plate, contributing to forming European Alps in general. What accounts for the folding and deformation? Were the sand beds ductile enough to fold during thrusting, (possibly over-riding)? Were they deeply buried and subject to high temperature at some point. The Sedimentary Logs are great. They really show how much more work is ahead.
Thanks for your reflections and questions. Deformation - the folding probably initiated while just below sea bed, as the Alpine orogen continued to evolve. Folding doesn't need great depth/temperature... certainly in sedimentary rocks like this. Folds can happen in even unconsolidated sand -mud successions (slump systems).