Calling geoman

Post your topics related to useful resources and research.
Post Reply
User avatar
coal digger
Posts: 3553
Joined: Sun Mar 18, 2012 9:23 pm
Location: Earth
Has thanked: 262 times
Been thanked: 493 times

Calling geoman

Post by coal digger »

Had a flick round on some land which has had a deep plough going past the sandstone and into the clay which is a first for me. I thought this was pottery at first the way it was gleaming but turns out it's rock. I have flatted one side off and polished it just out of curiosity. Any idea which of the three rock formations it could be? Found in Derbyshire.
Cheers cd.
You do not have the required permissions to view the files attached to this post.


Never wish this day gone, as this day can never be replaced

User avatar
ratty
Posts: 839
Joined: Mon Nov 04, 2019 10:42 am
Location: Banbury
Has thanked: 625 times
Been thanked: 475 times

Re: Calling geoman

Post by ratty »

Possibly furnace slag. :)

User avatar
ratty
Posts: 839
Joined: Mon Nov 04, 2019 10:42 am
Location: Banbury
Has thanked: 625 times
Been thanked: 475 times

Re: Calling geoman

Post by ratty »

Blue John has more of an transparent crystal structure,similar to amethyst. :)

User avatar
sweepstick47
Moderator
Posts: 11536
Joined: Sun Nov 27, 2011 8:21 pm
Location: North Lincolnshire
Has thanked: 2536 times
Been thanked: 3236 times

Re: Calling geoman

Post by sweepstick47 »

Not entirely sure but the 2nd photo has a good degree of 'blue' to it so it could possibly be
Blue John which is indigenous to Derbyshire (West-end of Hope valley). We have some knowledgeable geologist types on the forum so hopefully a definitive answer will arrive shortly. Good Luck - Regards ss47 ::g
A disservice is no service at all.

geoman
Posts: 753
Joined: Fri Jun 17, 2011 7:27 pm
Has thanked: 66 times
Been thanked: 166 times

Re: Calling geoman

Post by geoman »

Thanks for the prompt. It is likely to be blast furnace slag which is a vitrified glass in effect and often of this bluish to greenish colour.

It will have come from the furnaces of Sheffield as a soil conditioner for the land. The material contains phosphorus and other minerals which promote plant growth so was used before modern fertilizers.

User avatar
coal digger
Posts: 3553
Joined: Sun Mar 18, 2012 9:23 pm
Location: Earth
Has thanked: 262 times
Been thanked: 493 times

Re: Calling geoman

Post by coal digger »

geoman wrote:
Wed Mar 18, 2020 9:10 pm
Thanks for the prompt. It is likely to be blast furnace slag which is a vitrified glass in effect and often of this bluish to greenish colour.

It will have come from the furnaces of Sheffield as a soil conditioner for the land. The material contains phosphorus and other minerals which promote plant growth so was used before modern fertilizers.
Brilliant geoman,makes perfect sense .Thanks for your time and knowledge,cd ::g
Never wish this day gone, as this day can never be replaced

geoman
Posts: 753
Joined: Fri Jun 17, 2011 7:27 pm
Has thanked: 66 times
Been thanked: 166 times

Re: Calling geoman

Post by geoman »

Happy to oblige.

Post Reply

Return to “Research Section Forum”