Apr. 8th, 2017

kyburg: (Default)
archatlas:

Sand Tufas

You could be forgiven for thinking that the otherworldly rock formations in these pictures come from another planet, or from a sci-fi movie perhaps. But they’re actually called sand tufas and they come from right here on earth.

A tufa is a peculiar form of calcium carbonate, and they’re created when calcium-bearing freshwater springs well up through alkaline lake water (which is rich in carbonates). The carbonate and calcium combine and, over centuries, these elements form unusual spires, towering columns, and strange cauliflower-shaped mounds which can reach heights of up to nine metres (30ft). Tufas can only form underwater, and they’re only exposed when lakes are drained or dry out over many years. Check out this collection of pictures compiled by Bored Panda to see these curious formations for yourself.

Via + image credits

http://ift.tt/2jhN1vz
from Tumblr http://ift.tt/2np82ah
via IFTTT

Profile

kyburg: (Default)
kyburg

October 2017

S M T W T F S
1 2 3 4 5 6 7
8910111213 14
15 16 17 18192021
22232425262728
293031    

Most Popular Tags

Style Credit

Expand Cut Tags

No cut tags
Page generated Oct. 18th, 2017 08:11 pm
Powered by Dreamwidth Studios