#geology

pick one, drop a comment why it sticks in your head:

• the 1995 keddie murders – basalt outcrop, north california
• the 2002 gwangju serial killings – volcanic tuff hillside, south korea
• the 2013 colorado mine collapse (suspected foul play) – gabbro shaft, colorado

any other crime tied to a quarry, lava flow, or sedimentary layer? throw it in the comments.

let's see which geology‑crime combo gets the most hype.

After weeks of confusing chalcopyrite for pyrite on every sample, I switched to a simple streak test and a hand‑held hand‑lens. One scratch on unglazed porcelain, a quick check of color and hardness, and the difference shouted itself. The first time I correctly identified a sulfide in the creek without consulting the lab, I actually felt a surge of competence. Anyone else still fighting the same misidentifications, or am I just lucky this time??

I tried the old trick of heating a crystal on a bunsen burner to see the reaction—completely unnecessary, but it reassured me the sample really is copper‑rich. If anyone has a faster way to confirm a sulfide in the field, feel free to drop it. Otherwise, enjoy my tiny victory; it's about time I stopped mixing up dull metallic flakes with bright brass‑like ones.

I'm still annoyed about the sampling issues we had last week in the field. We spent hours collecting what we thought were decent specimens, only to find out that the equipment had been improperly calibrated. Now we've got a bunch of potentially useless data and samples that might not even be representative of the site. It's not like we can just go back and re-collect everything, the outcrops are already being re-vegetated. Does anyone else have to deal with this kind of stuff? It feels like we're taking two steps forward and one step back every time we think we're making progress.

I've been staring at this one rock sample for weeks, trying to determine its composition and history. It's been a real challenge, but I think I've finally cracked the code. The sample is a metamorphic rock, and I've been able to identify several different minerals within it, including quartz, feldspar, and mica. What really threw me for a loop was the presence of a small amount of garnet, which I hadn't expected to see in this type of rock. But after doing some research and consulting with some of my colleagues, I think I have a good understanding of how it formed. The garnet is likely a relic of an earlier stage of metamorphism, and it's been preserved within the rock despite the later stages of alteration. I'm pretty excited to have finally figured this out, and I'm looking forward to sharing my findings with the rest of the community. I've learned a lot from this experience, and I'm grateful for the opportunity to study such a fascinating rock. The process of figuring out the rock's history has been really rewarding, and I feel like I've gained a new appreciation for the complexity and beauty of geological processes. I'd love to hear from others who have experience with similar rocks, or who have insight into the geological history of the area where the sample was collected.

just spent a half day on the ridge and this doc called the basalt layer limestone again tbh it's a repeat no one can fix it lol

fr just spotted a 2cm quartz vein in my backyard it’s small but feels like a win for my geology creds makes that astrophotography weekend a bit brighter lol

So, I was at the park with my 4‑year‑old and pointed at a big, smooth stone and said, "Look, that's a monster that lives under the bed." He started calling me the monster hunter, and now he thinks every rock is a monster. I tried to explain that it's just a rock, but he keeps insisting it's a monster. I feel like I need to go back to the basics of geology, but I'm not sure if I should keep telling him about igneous rocks or just stop. Anyone else had a similar moment?

So I spent three weeks programming a field robotics prototype to identify and collect basalt samples based on density algorithms. Sounds simple, right? Turns out my code couldn’t differentiate between a fist-sized gabbro and a suspiciously smooth cinder block. The robot spent an hour in the field last week, nobly ‘curating’ a collection of construction debris it sent back to the lab. My supervisor nearly choked on their coffee when they saw the data. I’m still cringing. But hey, at least the 40Ar/39Ar dating team had a good laugh. How do you all avoid these facepalms when integrating automation into fieldwork? I swear the machine looked judgmental when it picked that pink insulation foam over an actual amphibolite.

When you finally nail a clean 40Ar/39Ar plateau but the lab tech drops the classic ‘you need a 0.5 % H₂O correction’ bomb, you know it’s a rite of passage.

• Plateau age: 4.5 Ga, looks like the Hadean crust you keep dreaming about.
• Sample prep: crushed to 63‑125 µm, then hand‑picked for the brightest feldspar twins.
• Lab gossip: ‘Your step heating curve looks like a dinosaur spine – smooth until the last step, then a cliff.’
• Meme template: ‘Me after 10‑hour step heating: [image of a tired grad student staring at a plateau] ‘I thought I was done, but the correction is coming.’

Anyone else have a favorite “plateau‑fails” meme? Drop the best ones, and let’s see who can top the classic ‘When your K‑Ar date is older than the universe but the reviewer says “use a different decay constant.”.

TL;DR: The struggle is real, the correction is cruel, and the memes are forever.