Jasin wrote on Dec 27^th, 2024 at 9:14am:



Yes - example - we could have had a good story of how quartz geodes form and
how they obtain their different colours etc but we got nothing. 

Jovial Monk wrote on Dec 27^th, 2024 at 12:28pm:

Jovial Monk wrote on Dec 27^th, 2024 at 12:31pm:



Occams razor says that you don't have a BSc in geology - you made it up.   



https://en.wikipedia.org/wiki/Occam%27s_razor


In philosophy, Occam's razor (also spelled Ockham's razor or Ocham's razor;
Latin: novacula Occami) is the problem-solving principle that recommends
searching for explanations constructed with the smallest possible set of elements.

This philosophical razor advocates that when presented with competing hypotheses
about the same prediction and both hypotheses have equal explanatory power,
one should prefer the hypothesis that requires the fewest assumptions.

Monk - you were given plenty of chances to tell us something interesting -
that's all you had to do -
you even had a night to sleep on it.

A BSc graduate in geology would adore rocks and minerals and would enjoy
telling us all about it.
You didn't - instead you went on some homosexual rant and made personal attacks.

The simplest explanation is that you don't have a BSc in geology - you're a charlatan.

forgiven

namaste

The other thing is that you are not man enough to apologise.

I posted about one thing requiring a sincere apology from you. Apology not forthcoming, of course, either because you are a poof so not a real man or it is your ASPD.

https://www.fossilera.com/pages/how-do-geodes-form



Geodes are more or less spherical or egg-shaped rocks containing a hollow cavity which is lined with crystals. They form in both igneous and sedimentary rocks. There are two major steps in their formation.
A hollow cavity is formed in the rock.
Minerals precipitate out of a groundwater forming crystals on the walls of the cavity.

A Hollow Space Forms

In igneous (volcanic) rocks the hollow space is the result of a gas bubble becoming trapped inside of cooling magma. The amethyst geodes found within ancient basalt flows in Brazil & Uruguay are a good example of this.

In sedimentary rocks the hollow space is often formed by groundwater dissolving an existing structure within rock. For example in the case of Keokuk geodes from Iowa, concretions within the surrounding shale are dissolved, leaving round voids. Sometimes the cavity might form due to a fossil being dissolved or due to decaying organic matter leaving a gas pocket in the sediment.


Formation Of Crystals


In the second stage of geode formation, minerals are deposited on the walls of the cavity. These minerals are present in groundwater or hydrothermal fluids which flow through the host rock. Temperature or chemistry changes cause minerals to precipitate out of the water, hardening on the walls of the cavity. The first layer in many geodes is often chalcedony, a micro-crystalline form of quartz.

This precipitation will often recur many times due to cyclical changes in temperature or fluid chemistry. As this process reoccurs over and over, inwardly pointing crystals will form.

OK, off to the local big smoke to buy some yummy food and let Socks run and play in the dog park there.