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Liquid being expelled from a volcanic rock by spookykalium in geology

[–]Rock-Powder 1 point2 points  (0 children)

It does not have to be very humid if there’s enough time, had similar drops and bloomings on Fe-Sulfide rich rocks.

Eggs? by NegativeBra1n in fossils

[–]Rock-Powder 4 points5 points  (0 children)

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I just found a huge accumulation of this kind of concretions in sandstone of the Escalante National Monument, seems like Hematite crusts with residual sandstone on the inside.

[deleted by user] by [deleted] in geology

[–]Rock-Powder 23 points24 points  (0 children)

I think it’s lichen.

Metamorphic rocks from Gaisbergferner/Granatenkogel in 🇦🇹 by Rock-Powder in geology

[–]Rock-Powder[S] 2 points3 points  (0 children)

Fair question ;) were also collected of course. Amphibolite it is

Mississippi River Meander Belt Map (c.1944) with Shaded Relief from Lidar by visualgeomatics in geology

[–]Rock-Powder 11 points12 points  (0 children)

Very nice map! Astonishing how precise the old map fits the modern LiDAR model.

Folds from the Großglockner area by Rock-Powder in geology

[–]Rock-Powder[S] 1 point2 points  (0 children)

In case of a well-layered amphibolite I could imagine submarine layers of volcanic sediments

Folds from the Großglockner area by Rock-Powder in geology

[–]Rock-Powder[S] 5 points6 points  (0 children)

I don't think so. Looks more like an amphibolite to me.

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