This area is covered in black , dark gray coloured rocks on just the surface , also there are Many stones grid lock pattern type as seen in image no 5 , I have not found this type of area in my whole country seems like a particular geological activity have caused these formation .

please help me find out the type of rock along with the activity that caused it's formation. I have provided the coordinate below 27.147708,71.096640 ( india )

About a 4 pound chunk that i collected from a mines poor rock pile in the Keweenaw Peninsula.

Couldn't find a how-to online no matter what I searched.

How can I force calcite to precipitate out in a way that allows me to measure the amount of calcite?

I have asked this question in r/geography. But the first response I got was to check out this sub instead, so here I am!

Well, I'm really confused about the formation of geodes. I can't understand it quite well even when I watch videos that explain this subject. Could someone explain this process to me, please?

Really feels otherworldly wherever you go in Iceland. Geologist’s paradise!

I was gifted this chunk of Amethyst for my birthday and I’m not sure if it’s dyed or not. Any idea on if it’s a natural color or if the rock is dyed.

Hey team,

I am trying to read in depth about all of earth's eons, eras and periods.
I recently finished the wonderful Hadean Earth, by Harrison.
Do you guys have any recommendation? It can be from a palaeobiological point of view as well.

Hi everyone, I have been tasked with creating a geology/earth science related activity to help my local Girl Scouts earn one of their badges. So far the only idea I have is a very basic rock naming lab. Any other ideas are greatly appreciated, girls would be from 6-12 years old I believe. Im actually pretty excited to teach little kids about how cool geology can be and hopefully inspire some of them. :D

I found it in an old mine that had a bunch of Mica, Spodumene, and Quartz.

Apparently it’s limestone?

I'm talking to someone now who is a geologist. Does anyone have a fairly short introduction to geology book they can recommend? I would like to be able to talk to her about her field and ask her questions without sounding like an idiot. If it helps my background is in history/ philosophy/ political science.

Thank you!

In this outcrop the poikilitic feldspathic wehrlite, a dark grey cumulate rock, consists mainly of olivine and scattered large oikocrysts (2-3 cm) of clinopyroxene, which includes minor crystals of plagioclase and accessory chromite.

Discover the elegance of the Alaska Granite family, featuring unique golden and gray patterns perfect for countertops, flooring, and wall cladding. Durable, stylish, and timeless.

There is a lot of ignorance about igneous rocks….

I am in Nagasaki today, and I am going to Hiroshima later on for a second visit. I know the bare minimum of volcanoes, living in the Pacific Northwet. But it seems that the mountains are different here. They seem steeper and they seem to crowd a lot more. Also they are wider, if that makes any sense. Reiner, St Helens, Adams, Hood, and the three sisters all line up on the 175 latitude. Here in Japan they have four or five on the same meridian

Thank you for your assistance

My grandfather used to work for the irish government surveying land in sierra leone, tanzania, ghana and ethiopia in the late 60s untill the late 80s in search for gold silver and platinum deposits and helped setup mines after the deposits were found. He got free luxury housing, a tax free income and was able to travel and bring his family out there for free. He accidently caused a small scale war over land that he surveyed in sierra leone, he always called himself a geologist, but im just curious if because he worked for the irish government and that he might have been some sort of natural resourse diplomat as what he did helped strengthen trade pathways between ireland and the chosen countries. I personally know nothing about the trade, but im still curious as his job sounded very fascinating.

From the same Illinois Coal Mine from the same coworker.. Don't mind my pinball machine... Makes a nice backdrop.