Questions tagged [identification-request]

For help in identifying objects such as clouds. Please include as many details as possible. DO NOT ASK ROCK IDENTIFICATION REQUESTS — rock identification requests are off topic.

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18
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1answer
2k views

What are these metallic nodules that were found at low tide on the UK south coast?

Smooth spherical crystalline metal nodules Outside and inside surface does not scratch with a knife blade Inside lustre brassy, radially striated metallic crystals radiating from a lumpy centre at the ...
13
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2answers
842 views

What are these lake-like blue patches in the desert, visible in satellite image?

I found some blue patches in the Arabian desert in Google Earth. It looks like as if they were lakes with sand dunes rising out of the water. But there isn't water in the desert, at least not this ...
13
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1answer
697 views

What type of cloud formation are these dark low-hanging clouds?

I was thinking it could have been a non-rotating wall cloud, but I'm not sure. YouTube video Picture taken on September 9 2014... between 5-7 pm in North Georgia, about 40 miles north of Atlanta.
11
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4answers
2k views

What sort of rock is the large polished boulder?

This large polished boulder sits outside one entrance the University College Hospital in London: Here is a close up: What sort of rock is it and how would it have formed?
11
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2answers
990 views

What causes these mound-like ground formations?

Whilst riding on Mam Tor in Castleton, England I came across this scene (not my photo) and I would like to know what causes the formations which I have ringed in red. They look like piles of earth ...
11
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1answer
269 views

Is this a former volcano in the Hamad Plateau, in the Syrian desert?

On my random explorations of google maps, I came across this interesting terrain: (link to map here) Apparently, this is part of the so-called Hamad Plateau, in the Syrian desert. If so, the rock ...
10
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1answer
759 views

What kind of coal did I find?

I found a piece of (what I believe is) coal, on Cape Cod last week. Its density is 1.43 grams per milliliter. With this information is it possible to know whether it's Anthracite, Bituminous or ...
10
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2answers
176 views

Strange scar marks on pebble

My question is not specifically about identification of this piece of rock. Instead I am focusing on the origin of the scar marks on this rock. I have found this stone in the pebbles in the path. This ...
10
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2answers
259 views

Rock identification? [on hold]

This stone is part of a rock mass found in one of the plains of Iran. There are no rocky mountains around these rocks. I'm geologist and I guess it's part of the meteorite, what do you think? Color: ...
9
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3answers
600 views

What do you call boulders of non sedimentary rock that were lithified into sandstone?

I'm convinced there is a word for this. I was in the Hoodoos at Writing on Stone this weekend and kept noticing what looked like reddish quartzite boulders laying around in the sand, or sometimes ...
9
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1answer
844 views

Rock ID: a black rock/lava? around another white rock, unknown location

I tried to look for any similar rocks on the Internet but couldn't find anything and I don't know much about geology. I've been given this rock when I was a child and now I'm just curious to know ...
8
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1answer
1k views

What is this brown and white rock?

We found this rock in our backyard. Could someone please tell me what it could be?
8
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1answer
126 views

What kind of rock is this being eaten by a rock-eating worm?

The New York Times article This Creature Eats Stone. Sand Comes Out the Other End. describes the shipworm Lithoredo abatanica, an organism that appears to "eat solid rock". It links to the item in ...
8
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2answers
2k views

What is this blue rock?

I am trying to identify a rock my husband found.The rock was found in Columbus Ohio about 20 feet (6 m) down. It is about the size of a basketball and extremely heavy (90 lbs) and difficult to cut ...
8
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1answer
615 views

We found this rock and we don't know what it is

I found these rocks at a road in Sweden. They are different from the other rocks used for the road. The hardness is higher than 5.5 as the rocks aren't affected by a knife. the size is 2.0-2.5cm ...
8
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1answer
856 views

Rock ID: shiny, very hard, black rock from Louisiana, USA

I have had this for over 20 years and I still don't know what it is. I found it on top of the ground by my dad's workshop in our yard in Louisiana. I don't know how it got there. It weighs 6 pounds 7 ...
8
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2answers
598 views

Identification of dark red, metallic mineral

I recently found this mineral crystallised within quartz at a rock crushing plant. Because of this I have no idea where this rock came from as material is transported to the site from a variety of ...
8
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2answers
667 views

What type of rock is this paving stone and what is the origin of the red colouration?

This paving slab is part of the floor of the new atrium in Kings Cross Station in London: The paving slabs are mostly grey but some contain areas of this reddish colouration. They are all fine ...
8
votes
1answer
808 views

Rock ID: brittle black/white w/ crystals & mica-like cleavage layers, Raleigh, NC, USA

Where it was Found: I found the rock laying on the sidewalk near some landscaping at my apartment complex in Raleigh, NC. Size: The largest intact portion of the rock is about 2.2 cm in diameter. ...
8
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2answers
630 views

What kind of a rock is this (from Finland)?

I found this rock at my friend's summer cottage in Finland. I have never seen a rock like this in my life. It resembles a lava stone, but Finland isn't a volcanic country. I am no expert in geology ...
8
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1answer
774 views

What is this Cape Breton rock?

What is this rock? I found it in Cape Breton, Canada
8
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2answers
666 views

Rock ID: Large, heterogeneous, magnetic rock in Cascade Range, Washington, USA

I found this rock in a glacial till in north central Washington State, on the east side of the Cascade Range. The dark round crystals are roughly 1 inch (2.54 cm) by 2 inch (5.08 cm) in size. The ...
8
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1answer
526 views

What kind of rock is this gray and brown weathered cylinder-shaped rock I found near a New York lake?

I found this rock on the beach of a freshwater lake in the Finger Lakes region of New York state and am interested in knowing more about it. It is about 2" tall and 2" wide at widest point. Weighs 14....
7
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2answers
436 views

What are these Gizmos at Izaña Atmospheric Research Center in Spain?

This tweet from the account of the Centro de Investigación Atmosférica de Izaña (AEMET) http://izana.aemet.es Izaña Atmospheric Research Center (AEMET) shows images of meteorological instruments ...
7
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2answers
432 views

What is this white rock with large brown crystals?

Found this in a creek in the mountains of North Carolina.
7
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2answers
2k views

Rock ID: Geode, soft, dull black exterior with crystal inside, from Snæfellsnes, Iceland

My fiancée found this on a recent trip to Iceland, on Snæfellsnes peninsula - she spotted the sparkle of the crystals among the abundant black, grey, and dark red rocks. There is a roadside vista spot ...
7
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1answer
260 views

Ceramic “honeycomb” structure with triangular cells: is it natural?

I saw this yesterday at a friend's house. He says he found it in a creek bed in southern Oregon. It looks like it is made of the common clay mud around here. The shafts are around a millimeter across ...
7
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1answer
278 views

What is the oldest fossil on Earth?

What is the oldest fossil ever found on Earth? Where and when was it found? What was the oldest fossil with a brain with 2 hemispheres ever found?
7
votes
1answer
496 views

Identification of a rock from Kentucky [closed]

I was hiking the other day in southeastern Kentucky and ran across this rock on a river bank. I've never seen a rock like this before. Can anyone here identify it?
7
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1answer
355 views

Mineral Rock Identification

Went out hiking after some heavy rains and came across an area that looked like broken glass sticking out from mud. On a closer look this is what we found. Not sure what it is and would like to know ...
7
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3answers
1k views

How was this egg shaped rock made and what is it? [closed]

The following small egg-like rock was found laying on the ground in Tampere, a city in southern Finland. It weights about 950 grams, has a volume of about 360 cm3 and thus a density of about 2600 kg/...
7
votes
1answer
3k views

Rock identification : very hard brownish black with gold shimmer found on beach in RI

I found this on the beach in Rhode Island. Although similar at first glance to coal, it's more gold-ish/bronze iridescent and very hard. 2" wide. It would not flake or scratch with a piece of metal. ...
7
votes
2answers
3k views

Rock ID: smooth, black, durable rock from Lake Ontario

What is this black rock? I found it beneath the waters of Lake Ontario near the shoreline, it is a dark greyish-black with small flecks of mineral deposits on it that are visible in the light. The ...
7
votes
1answer
253 views

The geology of local landscapes and small scale features

I'm learning geology to understand the processes behind the formation of my local landscape. I understand the processes behind big features, such as mountains. But I'm struggling to understand the ...
7
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0answers
158 views

Rock ID: brown, magnetic inclusion in Carpathian amethyst geode

What I believe is an amethyst geode (roughly 6" = 15.24 cm across) from somewhere in the Carpathian Mountains contains an oval-shaped inclusion of material with what look like pits of green ...
6
votes
2answers
200 views

Rock identification and features

The rock is approximately 12cm in length and from what I can tell this is a sedimentary rock and is a conglomerate. I'd say it was from a high energy environment due to the round gravels. This is all ...
6
votes
2answers
1k views

What is this spaceship-shaped cloud?

This tweet from the European Space Agency (ESA)'s Spanish account show a striking photo of a round, flat, "space-ship-shaped" cloud in an otherwise completely clear sky. The stars are out so I assume ...
6
votes
1answer
734 views

Rock identification: meteorite or lava?

I was told by a crystal quartz store owner it was a type of lava rock but I have high doubts. hardness: diamond size: 4'' $\times$ 4'' weight: 1.5 lb location: unknown smell: sulfur trait: ...
6
votes
1answer
571 views

What are the blue spots in this rock?

The rock is 4 inches (~10 cm) long. The vendor claims this rock is from K2. Are the blue spots real or painted on?
6
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2answers
126 views

What caused this waterfall to have rounded formations?

This is at Bua Tong Waterfalls in Chiang Mai, Thailand. Tried to find scientific information about this waterfall, but google turns up only travellers' vague guesses, suggesting calcium carbonate ...
6
votes
2answers
149 views

Please help me Identify this rock

I am not an avid collector but I found a rock that was really out of place and have had it for 40 years now. So...basically, it's about time to figure this out. I found it in a field on the east side ...
6
votes
1answer
524 views

What kind of rock is this (from UK)?

What kind of rock is this? It was found in Threemilestone, near Truro in Cornwall, UK. The rock has a hardness of over 5.5, as a knife doesn't scratch most parts of it. It is 10cm across the top, ...
6
votes
1answer
463 views

What kind of stone is this? Green tourmaline, or something else?

I was looking near mountain rivers for stones that I know like quartz, calcite, jasper. By chance on the top of the ground there was this one. It's a silky lustre semi translucent green-yellowish, ...
6
votes
1answer
389 views

Is this iron ore?

Is this iron ore? I found it in the back yard in Western Australia few years back; it has a roughish surface. It was sticking out of my grass. It has sand grains stuck on it. It is reasonably hard, ...
6
votes
2answers
1k views

Basalt, slag or meteorite? [closed]

I found this rock on the edges of a known Drumlin in North East England. It looks to be a fragment from a larger piece. It attracts a magnet strongly, it weighs 150 grams. It has vesicular holes (on ...
6
votes
1answer
270 views

What type of storm cloud is this?

We have had (and are still experiencing) waves of storms passing through this area of the central Queensland 'Capricornia' coast, Australia. This area is a subtropical coastal environment, close to ...
6
votes
1answer
153 views

Identify yellow-tinted translucent mineral

I found a mineral near the hexagonal rock formations in High Island, Hong Kong that I'd like to get ID'd. It has a greasy and subadamantine lustre. It can scratch a U.S. Quarter Dollar and some types ...
6
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1answer
106 views

Can someone help me identify this cloud formation?

These pictures were taken today in Oklahoma City and I am both baffled and curious as to what formation this may be. I was wondering if anyone had any idea? Thank you!
5
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4answers
568 views

How is this crumbly crystal-rich rock formed?

I found this crumbly rock embedded in the channel walls of a small creek in Everett, WA, USA. (North Creek that flows through McCollum Park.) If possible, I'd like to know how the rock formed... what ...
5
votes
5answers
1k views

What type of rock is this that is light colored with greenish crystals?

I found this rock. It is probably a very common rock but could an expert please tell me what rock this is?