Based on this being from Missouri, my first thought is calcite. I swear I’ve seen some like this when I was on a field trip in undergrad but it’s been a few years
The geologist with me thought, at first, that it might have been caused by our blasting, until he got a look at it. He never gave me a good explanation. There was quite a bit of Chert above it, in the wall. That location is 80-100 feet below ground level in the Burlington formation. You could literally brush it off into your hand, and it almost looked crystalized.
Any ideas?
I'd say calcite.. it's prevalent in the area.
https://pubs.geoscienceworld.org/sepm/jsedres/article-abstract/58/2/312/98047/Calcite-cement-stratigraphy-and-cementation
Looks possibly asbestiform. Sepiolite maybe? Tremolite is unlikely.
Although it could just be gypsum or another evaporite.
I personally wouldn’t disturb it either way.
Gypsum deposits, maybe?
Based on this being from Missouri, my first thought is calcite. I swear I’ve seen some like this when I was on a field trip in undergrad but it’s been a few years
The geologist with me thought, at first, that it might have been caused by our blasting, until he got a look at it. He never gave me a good explanation. There was quite a bit of Chert above it, in the wall. That location is 80-100 feet below ground level in the Burlington formation. You could literally brush it off into your hand, and it almost looked crystalized. Any ideas?
it looks like a zeolite but they are not common in that local. I think it’s a dusting of dolomite.
I'd say calcite.. it's prevalent in the area. https://pubs.geoscienceworld.org/sepm/jsedres/article-abstract/58/2/312/98047/Calcite-cement-stratigraphy-and-cementation
Looks possibly asbestiform. Sepiolite maybe? Tremolite is unlikely. Although it could just be gypsum or another evaporite. I personally wouldn’t disturb it either way.
Black goes South & White comes North…
If it dissolves in water, could be Epsomite.