316
geology problems (mander.xyz)
submitted 5 months ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
18 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[-] fossilesque@mander.xyz 48 points 5 months ago

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/

[-] nxdefiant@startrek.website 30 points 5 months ago* (last edited 5 months ago)

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

[-] PlexSheep@infosec.pub 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?

[-] weariedfae@lemmy.world 1 points 5 months ago

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

this post was submitted on 01 Jun 2024
316 points (97.3% liked)

Science Memes

11081 readers
2571 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.

Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
Sal@mander.xyz
fossilesque@mander.xyz
SciBot@mander.xyz