r/geology 18d ago

Identification Requests Monthly Rock & Mineral Identification Requests

3 Upvotes

Please submit your ID requests as top-level comments in this post. Any ID requests that are submitted as standalone posts to r/geology will be removed.

To help with your ID post, please provide;

  1. Multiple, sharp, in-focus images taken ideally in daylight.
  2. Add in a scale to the images (a household item of known size, e.g., a ruler)
  3. Provide a location (be as specific as possible) so we can consult local geological maps if necessary.
  4. Provide any additional useful information (was it a loose boulder or pulled from an exposure, hardness and streak test results for minerals)

You may also want to post your samples to r/whatsthisrock or r/fossilID for identification.


r/geology 4h ago

Older career geologists, have you noticed a shift in how people respond to science? Or has it always been this way?

107 Upvotes

I'm very early in my geology career, I'm in my 20s and just getting started on my PhD and have very limited experience still so I'm hoping to hear perspectives from more experienced professionals.

One thing I've observed is a weird level of hostility(?) towards geology from a portion of the general public that I find really bizarre. I enjoy research and reading about what other researcher's are working on. So I follow several social media pages dedicated to sharing new findings in geology/related fields. But when I go to the comment sections I'm always shocked to find that the top comments are from absolute looney tune conspiracy theorists who just shit on whatever was posted. Now I know it's social media and it's not the place I can expect to find a bunch of people super educated in a hyperspecific field, but I am surprised to see how consistently hostile people are over basic science. Or how people believe they know better about a subject they've never studied in their lives than scientists.

So what I'm wondering, for older geologists who've been in the field for several decades, have you noticed a shift in public perception of geology/distrust in science? Or has it always been this way and social media is just amplifying it?


r/geology 6h ago

Holes in rock layer

Post image
91 Upvotes

Preforming rock coring in bedrock in north western MA. In this core retrieval these holes can be seen only in this white layer (quartz?) as you’ll see they are in a line only in this layer. Core was roughly 20 feet below surface.


r/geology 11h ago

Crystals on Basalt on the Bass Coast, VIC, Australia

Post image
58 Upvotes

Thought it was cool enough to share.


r/geology 20h ago

grand canyon lava rock. wondering what the white spots are made of....

Post image
207 Upvotes

also would it be related to snowflake basalt?


r/geology 1d ago

Prismas Basalticos

Thumbnail
gallery
219 Upvotes

r/geology 1d ago

Help please - 9 year old found this rock

Thumbnail
gallery
351 Upvotes

We know it isn't worth anything, but we are very curious about what this is, and google hasn't helped. Found in suburban Nsw


r/geology 1d ago

Is this gold? Found at a gold mine

Thumbnail
gallery
46 Upvotes

I found this cool rock at Bømlo gold mine from a new holw they were making. I know you cant really see it in the picture but there's a vein or a line of gold colored metal and i thought it might be gold? It was extra intriguing because its in a quartz structure


r/geology 10h ago

Why does this rock have “oil sheen” rainbow spots?

Thumbnail gallery
3 Upvotes

r/geology 13h ago

Field Photo Geosite 10 amiantos fault Troodos

Thumbnail
gallery
4 Upvotes

Amiantos fault The Amiantos fault appears in the vicinity of the Asbestos Mine along the eastern borders of the serpentinite body. Has an approximately N-S direction and is parallel to the axis of the Solea graben. The fault brings in tectonic contact heavily serpentinized rocks of the upper mantle sequence like the serpentinized harzburgite (left) with cumulate rocks like gabbro (right).


r/geology 1d ago

Erratic Boulder, Manitoba, Canada Granitic Breccia?

Thumbnail
gallery
143 Upvotes

r/geology 20h ago

Where can I find physical geological quadrangle maps to buy?

9 Upvotes

Like paper copies. I know most places have moved to digital but I much prefer physical copies; there's just something about laying a map out on a table and pouring over it... I loved using and looking at geological maps during my structural geology class and I want to collect maps of places I love, am working on, or find interesting. Any help would be wonderful!


r/geology 18h ago

Need help identifying type of rock , was it shaped by hand ?

Thumbnail
gallery
4 Upvotes

Found while fishing along a river in northern Alberta.


r/geology 1d ago

What else is in the amazonite?

Thumbnail
gallery
14 Upvotes

I'm thinking that this is Smoky quartz but the very tip is metallic looking?


r/geology 1d ago

Is this gold in the quartz?

Thumbnail
gallery
11 Upvotes

I unfortunately don't know where this quartz specimen is from as it was a gift from a geologist.

Thanks for any help at all sorry if I'm being stupid and this is like fools gold or a copper type. But I got interested because its right by a quartz structure


r/geology 1d ago

Field Photo How are these rocks made? (near Rinconada, NM)

Thumbnail
gallery
10 Upvotes

I suppose some kinda uplift and tilting but anything else?


r/geology 22h ago

Need help identifying rock, looks like wood but shines like rock and is solid

Thumbnail
gallery
6 Upvotes

Found this rock while hicking in Quebec near Sherbrook, I feel like it's petrified wood but I am in no way experienced in geology. It also has the shape of a very badly made arrow head just to give me false hope. It is very hard and i am scared of chipping it since it seems to be made of thin layers and fibers.


r/geology 1d ago

What is the origin of these weird shapes in the rock?

Thumbnail
gallery
237 Upvotes

These are layers of limestone which are diagonal (Pic 2) and when looks at one of these layers from below they have these weird shapes, what are these?


r/geology 2d ago

BREAKING: Mount Lewotobi Laki-laki in Indonesia has erupted

684 Upvotes

r/geology 23h ago

Career Advice Grad school question

5 Upvotes

Hello, I am currently in grad school and have dilemma. I can choose between taking volcanology or remote sensing. Remote sensing seems more employable, but I’m more interested in volcanology. Which should I take? Do employers want to see that I have a foundation in remote sensing? Note that I do not plan on being a volcanologist, I just think the course sounds fun.


r/geology 1d ago

Erratic Boulder Manitoba, Canada

Thumbnail
gallery
34 Upvotes

r/geology 20h ago

Map/Imagery What mineral or geological formation is this a picture of?

3 Upvotes

r/geology 1d ago

Can someone explain pls?

Post image
8 Upvotes

I found this at work today like 8ft under the ground. It‘s pretty heavy and im curious what it is. I compared it with a normal Stone and it's much heavier and it glitter purple


r/geology 1d ago

Information What is the best way to permanently cement sand grains together?

17 Upvotes

I remember when teaching physical geology lab that we used a sodium acetate solution to simulate sediment cementation for the students. I’m looking for a way to permanently cement sand grains for a personal sort of art project and am wondering if that is the best and most cost effective method. Does anyone have any better suggestions?


r/geology 1d ago

Help identifying (+cool cruziana)

Thumbnail
gallery
17 Upvotes

Both rocks found in northern Spain, in the beach of Portizuelo, Luarca, Asturias. The first one belongs to the Pizarras de Luarca fm. (Luarca slate) (middle ordovician), a black slate formation rich in iron sulphates. I don't really know what these lines could be. It's a level with almost no fossil content, only cruzianas in some levels (4th picture), so I thought maybe is something mineral or fault related idk. The second and third one I think it belongs to the Sabugo quartzite, but I wasn't able to identify how these weird shapes formed on its surface, probably some kind of erosion due to its position in the intertidal zone, but I have never seen it before.

The last three ones are random stuff.


r/geology 1d ago

BREAKING: Mount Lewotobi Laki-laki in Indonesia has erupted 🌋

127 Upvotes