[Rockhounds] Stylolites

[Kreigh Tomaszewski]

The Wiki article is reasonably clear
https://en.wikipedia.org/wiki/Stylolite

On Sat, Mar 16, 2019 at 9:11 PM Alan Goldstein <deepskyspy at outlook.com>
wrote:

> What I know of stylolites:
>
> > Common in limestone formations.
> > If I have a chunk of rock, I call the feature a stylolite. Plural if
> there's more than one in the rock.
> > Limestone is water soluble and the pressure along bedding planes
> dissolved the rock at the interface. As the upper stratum settles on the
> lower, it forms interlocking striated notches.
> > The black material in stylolites is clay minerals, carbon, or a
> combination thereof.
> > It doesn't form vugs.
>
> People often think they've found petrified wood when they find stylolites
> in gravel.
>
> Alan G.
>
> -----Original Message-----
> From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> On Behalf Of
> Johan Maertens
> Sent: Saturday, March 16, 2019 11:33 AM
> To: rockhounds at rockhounds.drizzle.com
> Subject: [Rockhounds] Stylolites
>
> I never realized it
> But must have been walking over many while hiking and collecting in
> limestone quarries I always assumed the squiggly lines in the rock were
> thin marine clay or volcanic ash deposits at one time
>
> Now I learned about Stylolites
> I collected a few last weekend
> And they seem quite common.
>
> For the non-USA members
> I use the American term: stylolites are large planes (some over 1 km
> long/wide) Not the individual 'cones'
>
> I looked up that geology phenomenon
> And cannot quite understand
>
> Under pressure,
> Grains in rocks dissolve (dissolution anyone) All along a same line?
>
> Is stylolite formation a dry or wet process?
> Any heat involved?
>
> Johan Maertens
> Mr dot Calcite at live dot com
>
>
> _______________________________________________
> Rockhounds mailing list
> Subscription Services:
> https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Frockhounds.drizzle.com%2Fmailman%2Flistinfo%2Frockhounds_rockhounds.drizzle.com&data=02%7C01%7C%7C09802cbbfc18405ae83c08d6aa24cfbf%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636883472408049760&sdata=UraWeDI3K%2FhA17ki9FCESN7AXzlzfT7AWkde6pORSVE%3D&reserved=0
> List Usage Policy:
> https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2FTomaszewski.net%2FKreigh%2FRockhounds%2FRockhounds.shtml&data=02%7C01%7C%7C09802cbbfc18405ae83c08d6aa24cfbf%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636883472408049760&sdata=8pOraY06XzDUvk8Owu2wNxvaY0MprpWN5AgGnTjjUSM%3D&reserved=0
>
> _______________________________________________
> Rockhounds mailing list
> Subscription Services:
> http://rockhounds.drizzle.com/mailman/listinfo/rockhounds_rockhounds.drizzle.com
> List Usage Policy:
> http://Tomaszewski.net/Kreigh/Rockhounds/Rockhounds.shtml
>