Calcium Carbonate

Growth rings in an exposed CaCO3 outcrop.
The whole thing looked a bit like a stump.

Actively forming rock. The spikes are about 1cm across.
The source of the dissolved CaCO3 is the Madera Formation.

Another view of the first rock. The whole thing was full
of funnels or tubes, from these big ones to
about 2mm in diameter.

Comments

chickelit said…

Years ago, I rented a room in an old mansion near Essen, Germany. That region was heavily bombed during WW II. One night I got a flashlight tour of a bomb shelter which been hewn out of solid limestone beneath the house. There were several rooms cluttered with rusted bed frames and survival stuff. The ceilings had long, white, pencil-thin stalactites, some of which were several centimeters long.

10:18 PM

Synova said…

That sounds eerie.

Thanks for checking out my pictures. :)

10:39 PM

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