Not necessarily. Anything that produces a fine enough sediment will work - like this old clay pit in Dorset. https://en.wikipedia.org/wiki/Blue_Pool
> On 16 March 2017 at 20:53 ann sanfedele <[email protected]> wrote: > > > The key is that it is GLACIER produced - a lake fed from glacier > runnoff... I grabbed this abbreviated bit off the web for ya Jack.. > > ann > > What makes glacial lakes blue? > The silt is created when rocks underneath the surface of the ice are > grinding from the movement of the*glacier*. The rock flour is very light > and stays suspended in the*lake*water for a long time. The sunlight that > reflects off this rock flour is what gives the*lakes*their spectacular > turquoise*blue*or green colour. > > On 3/16/2017 10:53 AM, Jack Davis wrote: > > Been there and another example in > > Grand Teton National Park. > > The explanation making the rounds > > was "ice melt." (?) > > > > J > > > > Sent from my iPhone > > > >> On Mar 16, 2017, at 7:31 AM, Igor PDML-StR <[email protected]> wrote: > >> > >> > >> Very nice and peaceful photo. > >> > >> Some 4 years ago, during my trip to Banff National Park in Canada, > >> I also saw amazing blue color (although more teal-ish) of water: > >> https://42graphy.org/galleries/banff-2012/_IR37060.html > >> A frequent question that tourists ask there is what is the origin of such a > >> color. Someone told the story that some local guides feed to some naive > >> tourists that they regularly paint the bottom of the lake to get that look. > >> > >> Cheers, > >> > >> Igor > >> > >> PS. I am getting a very subtle impression that the photo is very slightly > >> tilted (CW). This might be due to the shape+perspective of the shoreline in > >> the middle, amplified by the apparent slope of the mountaing ridge ... So, > >> it might not be real. > >> In the absence of a true "horizon line", the only "reliable" line would be > >> the vertical line connecting the image to it reflection. Those seem to be > >> vertical, but it's hard to judge given the blurry reflection. > >> > >> > >>> On 3/11/2017 11:31 PM, David Mann wrote: > >>> > >>> > >>> Taken on the way home from Wanaka last month. I take minor variations of > >>> the > >>> same photo every time I'm there... > >>> > >>> http://gallery.multi.net.nz/photo/1043/#peso > >>> > >>> Cheers, > >>> Dave > >> -- > >> PDML Pentax-Discuss Mail List > >> [email protected] > >> http://pdml.net/mailman/listinfo/pdml_pdml.net > >> to UNSUBSCRIBE from the PDML, please visit the link directly above and > >> follow the directions. > > > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
