r/askgeology
▲ 39 r/askgeology
Partial Concretion Reveal
Here is what I believe to be a concretion I found last year. Got a bunch of jokes about it being an old petrified cow patty lol. I was hesitant to open it up but I saw cut it the other day and was curious about what I’m looking at. There’s some cool veins in it, there is a “granite” like looking vein but not entirely sure what it is exactly. Then there is some like fools gold appearing metallic veins in it. Couple areas that look like some quartz or crystalline structure. Just posting to learn about it if anybody knows.
u/CreamOfGinga — 3 days ago
▲ 58 r/askgeology
My grandfather gave me 2 like this long ago and said they were crystals from Mexico. He got them when he was in Mexico in his 20s but... they scratch quartz, chert and glass. Now I'm not sure what they are. Any idea ? Because it can't really be diamond each weighting over 4 grams. I'm not that lucky
u/Axthanx — 5 days ago
▲ 17 r/askgeology
Am I hallucinating or has the ground really been shaking everyday for weeks?
I feel like I’ve been loosing my mind lately. Around two weeks ago, there was a 5.5 magnitude earthquake in my city. It was in the afternoon, I was laying in my bed and suddenly everything started to shake for approximately five seconds. I live in a fifth floor and it was relatively strong, but nothing super extraordinary. Nevertheless, it’s the first time in my life I’ve truly felt an earthquake to its full extent.
Anyways, the thing is that almost every night since I’ve been awaken in the middle of my sleep, and I’ve noticed these very subtle vibrations that can last up to two minutes. They are very, very weak tremors, so it’s pretty much impossible to record them and sometimes I have to stop breathing to even feel them. Other times, these are the equivalent of sitting down in a massage chair.
These usually occur at around 2:00-4:00 am, and I’ve thought that perhaps because I’m at such an hypnagogic state of mind when I am awaken during these hours, maybe I’ve been hallucinating everything. Last night, however, I felt them and forced myself to a fully awake state, and I could still feel the vibrations for around 15 to 20 seconds.
If this can really be attributed to seismic activity, maybe the reason I only feel them in bed is because my entire body is laying down and has greater surface area in contact with the ground. Maybe this happens all throughout the day on a daily basis, we just don’t typically feel it because we’re not in a recumbent position.
Does my theory have scientific validity or am I tripping?
u/psantcugatdel1508 — 5 days ago
I’m building Metallo, a map for exploring mineral resources and the geology behind them
Hi everyone,
I’m building Metallo, an app for exploring where mineral commodities are found and the geological and tectonic context around them.
I’m also making Metallo Labs: interactive explainers about the minerals in everyday technology, like phones and GPUs, and how a mine goes from exploration through restoration.
It’s an ongoing project. Take a look and let me know what you think!
u/MatrixNokiaPhone — 11 days ago
What’s going on here
John’s Valley formation, southeast Oklahoma. Creek find. I don’t have a picture before I started taking flakes off it. I’ve been hounding for chert for several years now in this area and have never come across something like this. The chert near the cortex is smooth and all the black stuff in the middle looks freeze cracked (or something).
u/chancetheknapper — 10 days ago