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423 results for “vickyveritas”
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@vickyveritas This really is quite an amazing specimen! I’ve not seen this combination of minerals before. Of course you know I truly wish I’d been there with you to see it. #Geology #TucsonGemMineralShow
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@vickyveritas This really is quite an amazing specimen! I’ve not seen this combination of minerals before. Of course you know I truly wish I’d been there with you to see it. #Geology #TucsonGemMineralShow
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The future is exciting. Come join us. #VoteTheFuture Vote #Perovskite Open to all. Vote here: https://www.mineralcup.org/2023/campaigns/round-3-match-4
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The future is exciting. Come join us. #VoteTheFuture Vote #Perovskite Open to all. Vote here: https://www.mineralcup.org/2023/campaigns/round-3-match-4
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The future is exciting. Come join us. #VoteTheFuture Vote #Perovskite Open to all. Vote here: https://www.mineralcup.org/2023/campaigns/round-3-match-4
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The future is exciting. Come join us. #VoteTheFuture Vote #Perovskite Open to all. Vote here: https://www.mineralcup.org/2023/campaigns/round-3-match-4
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The future is exciting. Come join us. #VoteTheFuture Vote #Perovskite Open to all. Vote here: https://www.mineralcup.org/2023/campaigns/round-3-match-4
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@vickyveritas noooooo! Two of my favorite crystals! I failed to find any #Crocoite I could afford in the last six years of hunting for it at Tucson show. I do have a fine chunky piece of #Diopside though, purchased directly from a family mining it, I think in Ethiopia.
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@vickyveritas noooooo! Two of my favorite crystals! I failed to find any #Crocoite I could afford in the last six years of hunting for it at Tucson show. I do have a fine chunky piece of #Diopside though, purchased directly from a family mining it, I think in Ethiopia.
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The Role of Salt Tectonics in the Energy Transition: Salt Tectonics may have a big role to play in providing heat for geothermal plants, CO2 storage, and holding tanks for hydrogen.
From Scientific Frontline: https://mastodon.social/@sflorg/109904321222477890
Also see: https://tektonika.online/index.php/home/article/view/11/5
For a brief intro to Salt Tectonics see: https://c.im/@vickyveritas/109894850626623245
#SaltTectonics #EnergyTransition #CO2Storage #HydrogenHoldingTanks #HeatForGeothermalPlants
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The Role of Salt Tectonics in the Energy Transition: Salt Tectonics may have a big role to play in providing heat for geothermal plants, CO2 storage, and holding tanks for hydrogen.
From Scientific Frontline: https://mastodon.social/@sflorg/109904321222477890
Also see: https://tektonika.online/index.php/home/article/view/11/5
For a brief intro to Salt Tectonics see: https://c.im/@vickyveritas/109894850626623245
#SaltTectonics #EnergyTransition #CO2Storage #HydrogenHoldingTanks #HeatForGeothermalPlants
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The Role of Salt Tectonics in the Energy Transition: Salt Tectonics may have a big role to play in providing heat for geothermal plants, CO2 storage, and holding tanks for hydrogen.
From Scientific Frontline: https://mastodon.social/@sflorg/109904321222477890
Also see: https://tektonika.online/index.php/home/article/view/11/5
For a brief intro to Salt Tectonics see: https://c.im/@vickyveritas/109894850626623245
#SaltTectonics #EnergyTransition #CO2Storage #HydrogenHoldingTanks #HeatForGeothermalPlants
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The Role of Salt Tectonics in the Energy Transition: Salt Tectonics may have a big role to play in providing heat for geothermal plants, CO2 storage, and holding tanks for hydrogen.
From Scientific Frontline: https://mastodon.social/@sflorg/109904321222477890
Also see: https://tektonika.online/index.php/home/article/view/11/5
For a brief intro to Salt Tectonics see: https://c.im/@vickyveritas/109894850626623245
#SaltTectonics #EnergyTransition #CO2Storage #HydrogenHoldingTanks #HeatForGeothermalPlants
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The Role of Salt Tectonics in the Energy Transition: Salt Tectonics may have a big role to play in providing heat for geothermal plants, CO2 storage, and holding tanks for hydrogen.
From Scientific Frontline: https://mastodon.social/@sflorg/109904321222477890
Also see: https://tektonika.online/index.php/home/article/view/11/5
For a brief intro to Salt Tectonics see: https://c.im/@vickyveritas/109894850626623245
#SaltTectonics #EnergyTransition #CO2Storage #HydrogenHoldingTanks #HeatForGeothermalPlants
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Salt Tectonics
Salt tectonics is the study of significant thicknesses of rock salt within sedimentary basins, how and why salt structures evolve and the three-dimensional forms that result, and the physics of salt mobilization. Salt tectonics is a fascinating branch of geology in itself. A good place to start with salt tectonics is geologist Myron Cook’s video linked below. It is 25 minutes long, but it’s an easy and fun watch. I recommend it. I have recapped it below. Bonus: Look at Myron Cook’s kitchen countertops. They are some kind of conglomerate, and I have a feeling it’s the Mineral Fork tillite. Why is that exciting? See: https://c.im/@vickyveritas/109583699008268157
Myron Cook opens the video with a map of the Sigsbee escarpment bathymetry map that shows the water depth from light pink = 150’ to dark green = 800’ (see below). This feature lies in the Gulf of Mexico offshore of Texas and Louisiana and is 550 miles in length. A close-up look shows the pitted surface of the escarpment that -spoiler alert- is underlain by salt deposits, but how did the salt get there?
170 million years ago, the supercontinent Pangaea started to rift apart where the Gulf of Mexico is now, opening a narrow and restrictive seaway allowing the water to evaporate whilst it still was being replenished (see below). This allowed the salt in the seawater to become very concentrated and it began to precipitate and drop to the ocean floor. Over deep time (a million years), the salt depositional body, called the “mother salt,” grew to 4,000 feet thick, and on land, erosion from the Rocky Mountains and from rifting began to deposit sediments on top of the salt body.
Sediments usually have a lower density than halite (salt), but after continuous loading sediment increases its density to greater than that of the halite, and that’s when salt tectonics begins. The underlying principle of salt tectonics is that salt moves from zones of higher load to zones of lower load, and the salt begins to flow, squishing and squeezing through fractures in rock, forcing its way vertically and horizontally forming 3D structures such as salt anticlines, ridges and walls, stocks, nappes, pillows, rollers, diapirs, detached diapirs, diapiric walls, extrusive domes (see below), and salt glaciers! Below is an ISS image of an oval-shaped salt glacier, about 14 km (8 mi) across, in the Zagros Mountains, Iran!
Salt bodies like the one just described can dome up causing faulting, and deflate causing subsidence and faulting. Imagine if you lived where there was a large salt body like there is in the Houston area, and it, along with all the associated growth faults (faults that form where there are large evaporate (ie salt) deposits), and groundwater and oil extraction has caused surface disruptions. See articles below for maps and details.
Finally, I posted on Upheaval Dome, Utah last week https://c.im/@vickyveritas/109876309686729772 , a feature that has been hypothesized to be caused by a salt diapir that later eroded away, or by a meteorite impact. There are salt bodies in the area, and knowing how powerful salt can be, this is likely the cause of that enigmatic feature.
Myron Cook’s video, A Gigantic and Mysterious Feature that Nobody has Heard of: https://youtu.be/y2Qqslr5ytY
More on Houston area problems: https://www.researchgate.net/publication/277003791_Growth_Faulting_and_Subsidence_in_the_Houston_Texas_Area_Guide_to_the_Origins_Relationships_Hazards_Potential_Impacts_and_Methods_of_Investigation
And more including maps: https://uh-ir.tdl.org/bitstream/handle/10657/636/Zheng%20Huang%20MS%20Thesis%20Geology.pdf?sequence=1
A tip of the hat to @rock_jockey who provided the inspiration for this post.
#SaltTectonics #Salt #Halite #SaltStructures #SaltGlacier #Houston #UpheavalDome #geology #Science
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Salt Tectonics
Salt tectonics is the study of significant thicknesses of rock salt within sedimentary basins, how and why salt structures evolve and the three-dimensional forms that result, and the physics of salt mobilization. Salt tectonics is a fascinating branch of geology in itself. A good place to start with salt tectonics is geologist Myron Cook’s video linked below. It is 25 minutes long, but it’s an easy and fun watch. I recommend it. I have recapped it below. Bonus: Look at Myron Cook’s kitchen countertops. They are some kind of conglomerate, and I have a feeling it’s the Mineral Fork tillite. Why is that exciting? See: https://c.im/@vickyveritas/109583699008268157
Myron Cook opens the video with a map of the Sigsbee escarpment bathymetry map that shows the water depth from light pink = 150’ to dark green = 800’ (see below). This feature lies in the Gulf of Mexico offshore of Texas and Louisiana and is 550 miles in length. A close-up look shows the pitted surface of the escarpment that -spoiler alert- is underlain by salt deposits, but how did the salt get there?
170 million years ago, the supercontinent Pangaea started to rift apart where the Gulf of Mexico is now, opening a narrow and restrictive seaway allowing the water to evaporate whilst it still was being replenished (see below). This allowed the salt in the seawater to become very concentrated and it began to precipitate and drop to the ocean floor. Over deep time (a million years), the salt depositional body, called the “mother salt,” grew to 4,000 feet thick, and on land, erosion from the Rocky Mountains and from rifting began to deposit sediments on top of the salt body.
Sediments usually have a lower density than halite (salt), but after continuous loading sediment increases its density to greater than that of the halite, and that’s when salt tectonics begins. The underlying principle of salt tectonics is that salt moves from zones of higher load to zones of lower load, and the salt begins to flow, squishing and squeezing through fractures in rock, forcing its way vertically and horizontally forming 3D structures such as salt anticlines, ridges and walls, stocks, nappes, pillows, rollers, diapirs, detached diapirs, diapiric walls, extrusive domes (see below), and salt glaciers! Below is an ISS image of an oval-shaped salt glacier, about 14 km (8 mi) across, in the Zagros Mountains, Iran!
Salt bodies like the one just described can dome up causing faulting, and deflate causing subsidence and faulting. Imagine if you lived where there was a large salt body like there is in the Houston area, and it, along with all the associated growth faults (faults that form where there are large evaporate (ie salt) deposits), and groundwater and oil extraction has caused surface disruptions. See articles below for maps and details.
Finally, I posted on Upheaval Dome, Utah last week https://c.im/@vickyveritas/109876309686729772 , a feature that has been hypothesized to be caused by a salt diapir that later eroded away, or by a meteorite impact. There are salt bodies in the area, and knowing how powerful salt can be, this is likely the cause of that enigmatic feature.
Myron Cook’s video, A Gigantic and Mysterious Feature that Nobody has Heard of: https://youtu.be/y2Qqslr5ytY
More on Houston area problems: https://www.researchgate.net/publication/277003791_Growth_Faulting_and_Subsidence_in_the_Houston_Texas_Area_Guide_to_the_Origins_Relationships_Hazards_Potential_Impacts_and_Methods_of_Investigation
And more including maps: https://uh-ir.tdl.org/bitstream/handle/10657/636/Zheng%20Huang%20MS%20Thesis%20Geology.pdf?sequence=1
A tip of the hat to @rock_jockey who provided the inspiration for this post.
#SaltTectonics #Salt #Halite #SaltStructures #SaltGlacier #Houston #UpheavalDome #geology #Science
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@vickyveritas I confess I’m not sure what ignimbrite really means, in terms of mineralogy or deposition. But I have a photo of a possible #lapilli tuff in the #Blackstone Group in #RhodeIsland (that I’ve posted before, it’s associated with mafic pillows but appears felsic).
#igneous #ignimbrite #fujifilm #XH1 27mm f/2.8 f/8 1/125 s ISO 800 -
@vickyveritas I confess I’m not sure what ignimbrite really means, in terms of mineralogy or deposition. But I have a photo of a possible #lapilli tuff in the #Blackstone Group in #RhodeIsland (that I’ve posted before, it’s associated with mafic pillows but appears felsic).
#igneous #ignimbrite #fujifilm #XH1 27mm f/2.8 f/8 1/125 s ISO 800 -
@vickyveritas I confess I’m not sure what ignimbrite really means, in terms of mineralogy or deposition. But I have a photo of a possible #lapilli tuff in the #Blackstone Group in #RhodeIsland (that I’ve posted before, it’s associated with mafic pillows but appears felsic).
#igneous #ignimbrite #fujifilm #XH1 27mm f/2.8 f/8 1/125 s ISO 800 -
@vickyveritas I confess I’m not sure what ignimbrite really means, in terms of mineralogy or deposition. But I have a photo of a possible #lapilli tuff in the #Blackstone Group in #RhodeIsland (that I’ve posted before, it’s associated with mafic pillows but appears felsic).
#igneous #ignimbrite #fujifilm #XH1 27mm f/2.8 f/8 1/125 s ISO 800 -
@vickyveritas I confess I’m not sure what ignimbrite really means, in terms of mineralogy or deposition. But I have a photo of a possible #lapilli tuff in the #Blackstone Group in #RhodeIsland (that I’ve posted before, it’s associated with mafic pillows but appears felsic).
#igneous #ignimbrite #fujifilm #XH1 27mm f/2.8 f/8 1/125 s ISO 800 -
Wilson Cycle Phase 3: Ocean Closing
“I enjoy, and have always enjoyed, disturbing scientists.”
~ John Tuzo Wilson
“From great oceans, giant mountains will form. This is the prediction of the third phase of the Wilson Cycle where we see the closure of the vast oceans like the Iapetus Ocean, and the formation of continent to continent collision mountains.”
~ Professor Dougal Jerrom, intro to Wilson Cycle Phase 3: Ocean Closing video linked below
In the 24 minute video below (a great watch), we continue our travels with Professor Dougal Jerrom of Oslo University, to look at evidence of the closing of the former Iapetus Sea in the Caledonian of Norway. The video starts with a nice recap of the other videos.
Whenever there is an ocean closure, geoscientists always look for ophiolite. Ophiolites in the geologic record provide evidence of subduction zone tectonics. We have already seen the pillow basalts, sheeted dikes (gabbros) and peridotites that form ocean crust in earlier videos in this series. An ophiolite is then a bit of oceanic crust that got swept up in the continental collisions and provides the first proof of an ocean closure.
Next we learn about melange - the sediments that were scraped up during subduction, also known as an accretionary wedge. There are also remnants of the island arc formed during subdution all accreted between the bits of continental crustal blocks that eventually collided.
Enjoy the video below where you see glimpses of the geology of the beautiful Norwegian Caledonian.
Wilson Cycle Phase 3: Ocean Closing: https://youtu.be/jYlQCbDmEVw
More on the closing of the Iapetus Sea here: https://en.m.wikipedia.org/wiki/Iapetus_Ocean
Includes Step 5 of the Wilson Cycle: https://c.im/@vickyveritas/10962360456...
Refer to this great labeled diagram of the Wilson Cycle for the components of the ocean closure and continent to continent collision and mountain building: https://c.im/@vickyveritas/109628513962823739
Note: We will see the last steps of the Wilson Cycle, the continent to continent collision and the formation of giant mountain belts, and the great grand finale of this series. Stay tuned.
#JohnTuzoWilson #TheWilsonCycle #Caledonides #IapetusOcean #Norway #PlateTectonics #Ophiolite #AccretionaryWedge #granites #SutureZones #Laurentia #Baltica #geology #ScienceMastodon #NorwegianGeologyRocks @geology -
Wilson Cycle Phase 3: Ocean Closing
“I enjoy, and have always enjoyed, disturbing scientists.”
~ John Tuzo Wilson
“From great oceans, giant mountains will form. This is the prediction of the third phase of the Wilson Cycle where we see the closure of the vast oceans like the Iapetus Ocean, and the formation of continent to continent collision mountains.”
~ Professor Dougal Jerrom, intro to Wilson Cycle Phase 3: Ocean Closing video linked below
In the 24 minute video below (a great watch), we continue our travels with Professor Dougal Jerrom of Oslo University, to look at evidence of the closing of the former Iapetus Sea in the Caledonian of Norway. The video starts with a nice recap of the other videos.
Whenever there is an ocean closure, geoscientists always look for ophiolite. Ophiolites in the geologic record provide evidence of subduction zone tectonics. We have already seen the pillow basalts, sheeted dikes (gabbros) and peridotites that form ocean crust in earlier videos in this series. An ophiolite is then a bit of oceanic crust that got swept up in the continental collisions and provides the first proof of an ocean closure.
Next we learn about melange - the sediments that were scraped up during subduction, also known as an accretionary wedge. There are also remnants of the island arc formed during subdution all accreted between the bits of continental crustal blocks that eventually collided.
Enjoy the video below where you see glimpses of the geology of the beautiful Norwegian Caledonian.
Wilson Cycle Phase 3: Ocean Closing: https://youtu.be/jYlQCbDmEVw
More on the closing of the Iapetus Sea here: https://en.m.wikipedia.org/wiki/Iapetus_Ocean
Includes Step 5 of the Wilson Cycle: https://c.im/@vickyveritas/10962360456...
Refer to this great labeled diagram of the Wilson Cycle for the components of the ocean closure and continent to continent collision and mountain building: https://c.im/@vickyveritas/109628513962823739
Note: We will see the last steps of the Wilson Cycle, the continent to continent collision and the formation of giant mountain belts, and the great grand finale of this series. Stay tuned.
#JohnTuzoWilson #TheWilsonCycle #Caledonides #IapetusOcean #Norway #PlateTectonics #Ophiolite #AccretionaryWedge #granites #SutureZones #Laurentia #Baltica #geology #ScienceMastodon #NorwegianGeologyRocks @geology -
Wilson Cycle Phase 2: Ocean Opening
“…for times before the present oceans existed, we cannot do plate tectonics. Instead we must consider the life cycles of the ocean basins.”
~ John Tuzo Wilson
In the 12 minute video below (a great and quick watch), “Wilson Cycle Phase 2: Ocean Opening”, we continue our travels with Professor Dougal Jerrom of Oslo University, to look at evidence of the former presence of oceanic crust.
The first evidence we find is the presence of pillow basalts formed in the deep ocean. Pillow basalts are erupting magma that is quenched (hardened) by the ocean water. The scientists can tell that the ocean was deep because the pressure of the water allowed the gases to be released in solution (no vesicles in the basalt). Pillow basalts are the top layer of oceanic crust.
Secondly we find evidence of a black smoker in a copper mine. The black smoker was created by hydrothermal activity, as evidenced by the presence of copper and other minerals, in the sheeted dikes, the second layer of oceanic crust.
Wilson Cycle Phase 2: Ocean Opening: https://youtu.be/AtflMez-Zb4
Includes Step 3 and 4 of the Wilson Cycle: c.im/@vickyveritas/10962360456...
Note: We will see the other steps of the Wilson Cycle in this series. More to come!#TheWilsonCycle #Caledonides #Norway #PlateTectonics #geology #PillowBasalts #SheetedDikes #BlackSmoker #HydrothermalActivity #ScienceMastodon #NorwegianGeologyRocks @geology
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Wilson Cycle Phase 2: Ocean Opening
“…for times before the present oceans existed, we cannot do plate tectonics. Instead we must consider the life cycles of the ocean basins.”
~ John Tuzo Wilson
In the 12 minute video below (a great and quick watch), “Wilson Cycle Phase 2: Ocean Opening”, we continue our travels with Professor Dougal Jerrom of Oslo University, to look at evidence of the former presence of oceanic crust.
The first evidence we find is the presence of pillow basalts formed in the deep ocean. Pillow basalts are erupting magma that is quenched (hardened) by the ocean water. The scientists can tell that the ocean was deep because the pressure of the water allowed the gases to be released in solution (no vesicles in the basalt). Pillow basalts are the top layer of oceanic crust.
Secondly we find evidence of a black smoker in a copper mine. The black smoker was created by hydrothermal activity, as evidenced by the presence of copper and other minerals, in the sheeted dikes, the second layer of oceanic crust.
Wilson Cycle Phase 2: Ocean Opening: https://youtu.be/AtflMez-Zb4
Includes Step 3 and 4 of the Wilson Cycle: c.im/@vickyveritas/10962360456...
Note: We will see the other steps of the Wilson Cycle in this series. More to come!#TheWilsonCycle #Caledonides #Norway #PlateTectonics #geology #PillowBasalts #SheetedDikes #BlackSmoker #HydrothermalActivity #ScienceMastodon #NorwegianGeologyRocks @geology
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Wilson Cycle Phase 1: Rifting
“These two mountain ranges are really one and the same – except that they are now separated by the Atlantic Ocean, which cut the range in two at a low angle when it opened between them. At one time the two belts had been joined, end-to-end, Caledonides in the north, Appalachians in the south…”
~ John Tuzo Wilson, “Did The Atlantic Close And Then Re-Open?” Nature, Vol. 211, No. 5050, August 13, 1966
Rifting of the enormously long mountain chain ended up with parts in both North America (Appalachians) and Norway (Caledonides), among many other places. Geologist and Geophysicist John Tuzo Wilson reconstructed the multi-phased tectonics to trace the earlier proto-Atlantic Ocean that closed, and today’s Atlantic Ocean that opened through the processes that are named for him: The Wilson Cycles.
In the video below, “Wilson Cycle Phase 1: Rifting”, we travel with Professor Dougal Jerrom of Oslo University, and researchers from the Centre for Earth Evolution and Dynamics (CEED) who take us back 450 million years, and into what was once 90 kilometers deep in the Earth’s crust to the Caledonian rocks of Norway that tell us about the biggest cycle on Earth. Don’t miss the video which gives a voice to the rocks that record our dynamic Earth and the Wilson Cycle.
Wilson Cycle Phase 1: Rifting: https://youtu.be/WAGFSf8gqfg
Includes Step 1 and 2 of the Wilson Cycle: https://c.im/@vickyveritas/109623604569764070
Note: We will see the other steps of the Wilson Cycle in this series of videos. More to come!
#TheWilsonCycle #Caledonides #Norway #PlateTectonics #geology #peridotites #turbidites #tillites #conglomerates #ScienceMastodon #NorwegianGeologyRocks @geology
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Wilson Cycle Phase 1: Rifting
“These two mountain ranges are really one and the same – except that they are now separated by the Atlantic Ocean, which cut the range in two at a low angle when it opened between them. At one time the two belts had been joined, end-to-end, Caledonides in the north, Appalachians in the south…”
~ John Tuzo Wilson, “Did The Atlantic Close And Then Re-Open?” Nature, Vol. 211, No. 5050, August 13, 1966
Rifting of the enormously long mountain chain ended up with parts in both North America (Appalachians) and Norway (Caledonides), among many other places. Geologist and Geophysicist John Tuzo Wilson reconstructed the multi-phased tectonics to trace the earlier proto-Atlantic Ocean that closed, and today’s Atlantic Ocean that opened through the processes that are named for him: The Wilson Cycles.
In the video below, “Wilson Cycle Phase 1: Rifting”, we travel with Professor Dougal Jerrom of Oslo University, and researchers from the Centre for Earth Evolution and Dynamics (CEED) who take us back 450 million years, and into what was once 90 kilometers deep in the Earth’s crust to the Caledonian rocks of Norway that tell us about the biggest cycle on Earth. Don’t miss the video which gives a voice to the rocks that record our dynamic Earth and the Wilson Cycle.
Wilson Cycle Phase 1: Rifting: https://youtu.be/WAGFSf8gqfg
Includes Step 1 and 2 of the Wilson Cycle: https://c.im/@vickyveritas/109623604569764070
Note: We will see the other steps of the Wilson Cycle in this series of videos. More to come!
#TheWilsonCycle #Caledonides #Norway #PlateTectonics #geology #peridotites #turbidites #tillites #conglomerates #ScienceMastodon #NorwegianGeologyRocks @geology
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The Wilson Cycle Illustration: No Rock is Accidental
I had to share this much better picture of the Wilson Cycle with a volcanic island arc and double subduction. All the details are beautifully labelled. Gorgeous work, and the Wilson cycle still fits.
Recap on Wilson Cycle: https://c.im/@vickyveritas/109623604569764070
#TheWilsonCycle #Rocks #geology #subduction #ScienceMastodon @geology
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The Wilson Cycle Illustration: No Rock is Accidental
I had to share this much better picture of the Wilson Cycle with a volcanic island arc and double subduction. All the details are beautifully labelled. Gorgeous work, and the Wilson cycle still fits.
Recap on Wilson Cycle: https://c.im/@vickyveritas/109623604569764070
#TheWilsonCycle #Rocks #geology #subduction #ScienceMastodon @geology
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Eclogite: the Christmas Rock
Eclogite is an absolutely fascinating and beautiful rock that has earned the nickname “Christmas rock” due to its colorful mineral garnet (red) and omphacite (green). What’s so fascinating about eclogite is the way it forms
Eclogite is a high pressure and temperature metamorphic rock formed from protolithic basalt or grabbro (oceanic crust) that has been dragged down a subduction zone to (or nearly to) the upper mantle. It is brought up by a process now known as “eduction.” More here: https://c.im/@vickyveritas/109668814063843473
The process of bringing eclogite back up from a subduction zone was first proposed by W. G. Ernst in 1965, and was an immediate controversy. Ernst’s early ideas have been accepted, expanded upon, tested, and extended. As an undergrad in the 90s, I had the great pleasure to have gone on a geology field trip, led by Gary Ernst, to Pacheco Pass, California, where eclogite is found in the Franciscan Complex. He is a lovely guy, very approachable, enthusiastic and willing to share.
Here is Ernst’s famous paper/abstract: https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/76/8/879/5938/Mineral-Parageneses-in-Franciscan-Metamorphic?redirectedFrom=fulltext
Here is Evelyn Mervine’s great AGU blog on eclogites: https://blogs.agu.org/georneys/2011/07/02/geology-word-of-the-week-e-is-for-eclogite/
#eclogite #gabbro #basalt #garnet #omphacite #ChristmasRock #geology #ScienceMastodon @geology