What rock is this ? Any Geologists here

kindai said:
How heavy is it? Kinda looks like pumice.

Chalk maybe?
Click to expand...

Its really heavy. Its defo not chalk

Amp34 said:
Quartzite or Limestone?

Difficult to tell with those images.

Can you scratch it with a pen knife. If you can it's probably predominantly calcite and possibly a Limestone of some kind. If not then its possibly made of quartz and may be a Quarzite.


If you can take an unblurry close up it may help.
Click to expand...

I'll try scratching it tomo


FurryLemon said:
Common quartz I'd expect.
Click to expand...

That is ok for a pond then

Whitewater said:
Does it taste of salt?
Click to expand...

Not licked it yet


Sasahara said:
Fossiliferous limestone, or some type of sandstone?
Click to expand...

Limestone is not good for ponds raised the PH hence my question...Wish I listened to geography in school and science lessons....:p
 
easyrider said:
Looks like this

http://geology.com/rocks/dolomite.shtml
Click to expand...

It's not dolomite.

you can see individual grains/crystals cement and matrix. Dolomite is a much higher grade metamorphic rock compared to what u got there.
In my opinions :p It's been a long time since i looked at sedimentary rocks.

Did you get it from where you live locally? (where do you live) Found on a rockface, a quarry or just loose? Provenance is everything in geology. The works probably already done just need to find it.
 
Efour said:
It's not dolomite.

you can see individual grains/crystals cement and matrix. Dolomite is a much higher grade metamorphic rock compared to what u got there.
In my opinions :p It's been a long time since i looked at sedimentary rocks.

Did you get it from where you live locally? (where do you live) Found on a rockface, a quarry or just loose? Provenance is everything in geology. The works probably already done just need to find it.
Click to expand...

Dolomite isn't metamorphic. :p It's a calcite that's been modified by groundwater. But you're right, on second thought it's too "grainy" to be limestone (unless it's a weird grainstone and assuming the grains aren't actually softening and sharpening artifacts from the camera - a sharper picture would definitely help) and probably quartzite too. Assuming it's not newly cleaved the weathering and shape is wrong too.

I'm going coarse grained clean sandstone, rather than quartzite, which should be fine for a pond.
 
easyrider said:
uDX44by.jpg

ZMujzzo.jpg
Click to expand...

Found it.

2elrbjV.jpg
 
I dunno if you guys had them here but back in Saffrica, a publisher went through a geology phase, selling fortnightly magazines which came with a free rock, bit like those D'Agostino magazines or whatever they're called.

I got my mom to buy me the first one (this was a big deal, we lived on the breadline) and soon after realised she'd spent a not inconsiderable amount of money on a bloody rock and that was the end of that :p



Edit: here, this

https://shop.deagostini.co.uk/treasures-of-the-earth-issue-58.html
 
If you vinyl wrap it in carbon fibre, it will be a carbon fibre rock made from carbon fibre. If it doesn't stick, use a glue gun and apply far too much.
 
easyrider said:
Limestone is not good for ponds raised the PH hence my question...Wish I listened to geography in school and science lessons....:p
Click to expand...

If it is limestone, it's not a major problem as it would be in the 7-8 PH range and it would require a low PH range to start dissolving at any significan't rate. If your water was doing that the water would be the big problem. :)

The grain does look sandy. Though there such a thing as lime sandstone. :D

Try this site.

http://www.open.edu/openlearn/science-maths-technology/science/geology/geology-toolkit-what-rock
 
Sasahara said:
If it is limestone, it's not a major problem as it would be in the 7-8 PH range and it would require a low PH range to start dissolving at any significan't rate. If your water was doing that the water would be the big problem. :)

The grain does look sandy. Though there such a thing as lime sandstone. :D

Try this site.

http://www.open.edu/openlearn/science-maths-technology/science/geology/geology-toolkit-what-rock
Click to expand...

Cheers...This is all good for my research and knowledge...Love this forum and love my pond :D
 
easyrider said:
Wish I listened to geography in school and science lessons
Click to expand...

I did really well in geography and sciences at school (multiple As) - and I have absolutely no idea.

Though not putting any of the earth sciences, etc. into use in more than 20 years doesn't help.
 
You must log in or register to reply here.
Back
Top Bottom