in my village this shape exist i examine this rock it massive basalt.
could we call it minor volcano
This could be cinder cone volcano. This is the most common type of volcano and also the smallest. The cinder cone resembles a composite volcano but on a much smaller scale. They rarely reach even 300 meters in height but have even steeper sides than a composite volcano. They usually have a crater at the summit. Cinder cones are composed of small fragments of rock piled on top of one another. These volcanoes usually do not produce streams of lava.
Where is your village?
Dear Mohsen Alshaghdari,
Please look around and post some more images. Look to stones that were used to build the houses in your village.
Regards
DEAR
IT IS BASALT , I AM SURE .
BESIDE SOME TUFF . AND ALL MOUNTAIN IS VOLCANIC TRAP SERIES (BASALTIC FLOOD)
It certainly looks like a small volcano. The other possibility is a meteor crater which also produces lava-like rock with gas cavities, but it would not have such gentle slopes.
It seems that the children are enjoying the experience.
dear michal
beside this there is also dome around 5 m high of tuff
Dear Moshen,
I have no doubt it could be basaltic. It may not even have extruded at the surface. If magma cools near the surface, the basaltic texture would result. There seems to have been multiple vents in the background. Interesting.
Obianuju P. Umeji
DEAR UMEJI
YES SAME AREA STRANGE MINOR STRUCTURES AS THERE IS TUFF DOME AROUND 3 M HIGH AND 2 M SQUARE AREA, IT IS CLOSE TO THIS AROUND 3 METER.
PLEASE FIND ATTACHED IMAGE
Dear Moshen,
There seems to be some complex magmatism, including extrusives (tuffs) and near surface intrusives (basalts) in the area. What is the lithology of the country rock? What an interesting geology.
Obianuju P. Umeji
Dark brown rock is probably weathered. Shape suggests a spheroidal weathering. Depressions are probably man made.
Looks like basaltic block raised from underlying basaltic flow by lagre bubble, the mechanism like at Myvatn lake, iceland - when lava flow covers very wather-rich area, the water starts to boil and big wather bubbles can form and reise the basaltic not too thick flow up. Such basaltic bubbles could be much large depending on the size of bubbles. In Iceland they are big and looks like cinder cone, but in reality they all are bubbles. See also attachet photos.
It may be a weather-associated structure of the "gnamma" or "tafoni" type.
Dear Moshen,
The photographs attached by Tartiana seem to have explained the underwater source of the igneous body i. e, the basaltic cone. I agree her explanation, more so for the similarity in size of the structures. But your cinder cone also is from ash falls, hence the "clastic" nature of the structure. The different bodies seem to have resulted from different modes of formation.
Do check from thin-section if the mineralogy is also different, hence the different structural forms. Do they come from the same magma body or different based on the mineralogy?
More questions?
Obianuju P. Umeji
Yehi
Thanks for this information I will do petrology study to figure out more
I vote for "large bubble". The basalt flow could be fairly fluid (typically, Trapp basalt is fluid), hence rather thin. If a thin flow of fluid basalt runs over wet ground, large steam bubbles will form and collapse, and this could be one of them.
It reminded me of some 'volcanic blister' I once saw in Victoria, Australia. I don't have a picture myself, but check at
https://www.geocaching.com/geocache/GC26Y7E_williamstown-lava-blister?guid=e4c810a5-68ae-41d9-ab33-01cd9e33bfa9
So essentially I agree with Tatiana and others.
sumit
it is basalt i already did the examine for rock , i ask fro explanation
Yes, it looks like a small basaltic volcano
Best Regards @ Mohsen Alshaghdari
Hello, I think this shape occurred by erosion. See the outcrops just behind the children, that I think those are related to the rocks that you mentioned before. Best