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Post by 1dave on Jan 3, 2022 11:40:14 GMT -5
   130 Million years ago Brazil and Africa VIOLENTLY broke apart, magma flowed up into the opening and sloshed five basalt lava waves over the land. Each wave was about 100 feet high, and in Brazil, they flowed as far south as Argentina. The land was mostly huge sand dunes over an aquifer. Heat penetrated and turned water to steam that bubbled up into the basalt. MUCH LATER after the basalt had cooled, contracted, and filled with cracks, ground waters penetrated multiple times with various loads of minerals - the specialty of the day. Above are some of the results. PS - Note how the bubbles fought against the basalt flow! |
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aGates
has rocks in the head
Building a silver studio
Member since January 2021
Posts: 518
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Post by aGates on Jan 3, 2022 14:54:45 GMT -5
Above are some of the results. PS - Note how the bubbles fought against the basalt flow! can you elaborate what i should look for? thank you. |
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Post by 1dave on Jan 4, 2022 15:32:28 GMT -5
PS - Note how the bubbles fought against the basalt flow! can you elaborate what i should look for? thank you.   |
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LazerFlash
Cave Dweller 
The more they over-think the plumbing, the easier it is to stop up the toilet.
Member since September 2021
Posts: 550
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Post by LazerFlash on Jan 4, 2022 19:58:07 GMT -5
Nice! And, thanks 1dave , for the detailed explanations.
It took a trip to the dictionary to figure out the name: Being a biologist by education, I knew that in the human brain, the amygdala is an almond-shaped part of the brain. Things that are roughly almond-shaped are called amygdaloid. Hence, the name of the part of the brain and the rock.  |
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Post by 1dave on Jan 4, 2022 20:04:25 GMT -5
This is the Geode Kid's interpretation. I think the flow was the other way around. Look at the cross-section as a plane wing with the lift under the wing as the bubble struggles to the surface before the basalt freezes. Wo is right, him or me? Debate? |
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