this post was submitted on 01 Jun 2024
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Science Memes

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320
geology problems (mander.xyz)
submitted 5 months ago by [email protected] to c/[email protected]
18 comments fedilink hide all child comments
 
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[–] [email protected] 35 points 5 months ago* (last edited 5 months ago) (1 children)

Fuck off. You can't just say things like that without telling the class what the difference is.

Edit: it looks like the right one has white specks and the left one doesn't? Can't tell if the white specks are actually there or just image compression or different lighting though.

[–] [email protected] 48 points 5 months ago (3 children)

You are right, my bad. :) One is granite and the other one is granodiorite.

Granite is a rock with certain minerals in certain ratios: quartz, alkali feldspar(AF) and plagioclase(PL), where there is more AF than PL.(+accessory minerals of course but let's keep it simple). Granodiorite has more PL than AF. For more information, look up the Streckeisen diagram, it's a little scary at first but there are good explanations of it. :)

Sauce: https://www.reddit.com/r/Geologymemes/comments/1cqg1yb/how_identifying_rocks_feels_like_sometimes/

[–] [email protected] 30 points 5 months ago* (last edited 5 months ago) (1 children)

"granodiorite" sounds exactly the kind of name someone who doesn't want to admit it's just granite would make up.

[–] [email protected] 4 points 5 months ago

Minecraft taught me that diorite is also a stone, so maybe it's when the two kinds of stones are mixed together?

[–] [email protected] 1 points 5 months ago

Good ol' grannies (granodiorite). They're important and diagnostic 'round these parts. Migrated down from Canadia we reckon.

[–] [email protected] 23 points 5 months ago* (last edited 5 months ago) (3 children)

In Minecraft that would be diorite but idk anything about IRL rocks.

[–] [email protected] 13 points 5 months ago (1 children)

One of them is diorite!

[–] [email protected] 10 points 5 months ago

Minecraft taught me right after all!

[–] [email protected] 12 points 5 months ago

The other one is actually a scoop of Cookies 'n Cream ice cream.

[–] [email protected] 3 points 5 months ago

This YouTube channel has educational geology content presented in Minecraft

https://youtu.be/uMx63AJShLE

[–] [email protected] 10 points 5 months ago

It's dragon fruit

[–] [email protected] 9 points 5 months ago (1 children)

I wish I knew geology, everything is just granite to me.

[–] [email protected] 1 points 5 months ago

Well at least you don't take it for granite

[–] [email protected] 9 points 5 months ago

[–] [email protected] 2 points 5 months ago (1 children)

We were allowed to use hydrochloric acid to help differentiate rocks that one time we had geology as a subject in geography class. Maybe that helps finding out the difference here?

[–] [email protected] 4 points 5 months ago

drips hydrochloric acid on finger
it bubbles

Yep, definitely limestone.

[–] [email protected] 2 points 5 months ago

mmmm cookies and cream

[–] [email protected] 1 points 5 months ago

The ol' switcheroo, eh?
Like some sort of meme narrative/expectation parkour!