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It`s Halloween Day


It`s Halloween Day
Photo Information
Copyright: Adrian Rusu (roges) Gold Star Critiquer/Gold Note Writer [C: 572 W: 0 N: 1083] (5302)
Genre: Places
Medium: Color
Date Taken: 2009-10-25
Categories: Nature
Exposure: f/3.5, 1/13 seconds
More Photo Info: [view]
Photo Version: Original Version
Theme(s): Friday theme 2009/10/30: "Halloween" [view contributor(s)]
Date Submitted: 2009-10-31 2:27
Viewed: 298
Points: 86
[Note Guidelines] Photographer's Note
Dear colleagues, today I would like to again offer a picture of Punkva Cave.
Approach and the subject Day, Halloween.
I like very much and hope you will like you too.
Below will give a description of the concepts and stactite and stalacmite.
I wish everyone a nice weekend,
Adrian

Stalactite:
A stalactite (from the Greek stalasso, "to drip" and meaning "that which drips") is a type of speleothem (secondary mineral) that hangs from the ceiling or wall of limestone caves. It is a type of dripstone.

Formation and type:
Stalactites are formed by the deposition of calcium carbonate and other minerals, which is precipitated from mineralized water solutions. Limestone is calcium carbonate rock which is dissolved by water that contains carbon dioxide, forming a calcium bicarbonate solution. The chemical formula for this reaction is:

CaCO3(s) + H2O(l) + CO2(aq) → Ca(HCO3)2(aq)

This solution travels through the rock until it reaches an edge and if this is on the roof of a cave it will drip down. When the solution comes into contact with air the chemical reaction that created it is reversed and particles of calcium carbonate are deposited. The reversed reaction is:

Ca(HCO3)2(aq) → CaCO3(s) + H2O(l) + CO2(aq)

An average growth rate is 0.13 mm (0.005 inches) a year. The quickest growing stalactites are those formed by fast-flowing water rich in calcium carbonate and carbon dioxide, these can grow at 3 mm (0.12 inches) per year.

Every stalactite begins with a single mineral-laden drop of water. When the drop falls, it leaves behind the thinnest ring of calcite. Each subsequent drop that forms and falls deposits another calcite ring. Eventually, these rings form a very narrow (0.5 mm), hollow tube commonly known as a "soda straw" stalactite. Soda straws can grow quite long, but are very fragile. If they become plugged by debris, water begins flowing over the outside, depositing more calcite and creating the more familiar cone-shaped stalactite. The same water drops that fall from the tip of a stalactite deposit more calcite on the floor below, eventually resulting in a rounded or cone-shaped stalagmite. Unlike stalactites, stalagmites never start out as hollow "soda straws." Given enough time, these formations can meet and fuse to create columns.

Stalactites can also form in lava tubes, although the mechanism of formation is much different.

Records:
The White Chamber in the Jeita Grotto's upper cavern in Lebanon holds an 8.2 meters stalactite which is also accessible to visitors and is claimed to be the longest stalactite in the world. While it has been claimed that the longest stalactite known hangs in the Chamber of Rarities in the Gruta Rei do Mato (Sete Lagoas, Minas Gerais, Brazil) and is 20 metres long, vertical cavers have often encountered longer stalactites while exploring. One of the longest stalactites viewable by the general public is in Doolin Cave, County Clare, Ireland, in a karst region known as The Burren, what makes it more impressive is the fact that the stalactite is held on by a section of calcite less than 0.3 square meters.


STALAGMITE :
A stalagmite (from the Greek stalagma ("Σταλαγμίτης"), "drop" or "drip") is a type of speleothem that rises from the floor of a limestone cave due to the dripping of mineralized solutions and the deposition of calcium carbonate. The corresponding formation on the ceiling of a cave is known as a stalactite. If these formations grow together, the result is known as a column.

When touring caves with stalactites and stalagmites you might be requested to not touch the rock formations. This is generally because the formation is considered to still be growing and forming. Since the rock buildup is formed by minerals solidifying out of the water solution onto the old surface, skin oils can disturb where the mineral water will cling, thus affecting the growth of the formation. Oils and dirt from the hands can also stain the formation and change its colour permanently.

Similar structures can also form in lava tubes, known as lavacicles, although the mechanism of formation is very different. Stalactites and stalagmites can also form on concrete ceilings and floors, although they form much more rapidly there than in the natural cave environment.

Stalagtites and stalagmites are similar to travertine in the way they form and in their composition, but there are differences.

The largest stalagmite in the world is 62.2 metres (220 feet) high and is located in the cave of Cueva San Martin Infierno, Cuba.
horias, walk33a, parasbhalla, tnahari, luckybry, gnada, mbrito, gaillarde, werdir, neusser0204, HapiSnapa, Hazara14, mikolaj_cava, milas, urs0114, czappas, tanburi, prometej, mvdisco, dilshan74, Karyn674 has marked this note useful
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Discussions
ThreadThread Starter Messages Updated
To ele_eng: Hi Alireza,roges 1 10-31 03:05
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Critiques [Translate]

Adrian
Ce faine formatiune, pe care speologii o numsc draperie!
Intradevar, carbonatul de calciu este un sculptor desavarsit, la care adaugam un fotograf la fel si iese o capture de nota zece.
Horia

hi adrian
great shot in these caves,very well lit excellent detail.
regards
jimmy

Hi Adrian!

Yes, we are neighbors today. This is such a timely post. Before I read your note, I thought it was a really cool Halloween exhibit. Great photo! Your post looks like Halloween, mine looks like Christmas.:)

TFS
Dennis

Hi Adrian,

An interesting capture on the eve of Halloween!

I like your natural approach here where geochemical processes are playing a great role :) Great note on Stalactites!
The sharpness and POV are perfect. The light is doing wonders here.

Well done, my friend!

best regards,
Paras

Hi Adrian

Nice nearby for today!
Amazing cave to travel around, great illumination effects
The details is good, did you bring into play a tripod? Such time-consuming shutter speed is not easy to handheld

TFS, Alireza

Merhaba Adrian
Wonderful capture related with the Friday Theme
Great light and mood
Have a nice weekend
Burak

Buena foto interior de tan bello lugar, felicidades, abrazos

Hi Adrian
excellent capture of an under ground scene.
good light and clear details.
the stalactites here looks like a white cloth covering a light bulb.
greetings
tsilla

hi ADRIAN realy grt shot the caves must be very atmospheric and you have captured it well grt lighting and persentation
tfs
have a grt halloween whooooooooooooooo
regards bryan

Hello Adrian,

Nicely created illusion. Good one.

Regards,
Siddhartha

  • Great 
  • Dot Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 1446 W: 31 N: 3117] (12664)
  • [2009-10-31 7:36]

HI Adrian
A surprise from the cave.
It is somewhat ghoulish, quite a find and so appropriate for this time of year.
Well done
Dot

  • Great 
  • gnada Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2660 W: 74 N: 4764] (21701)
  • [2009-10-31 9:15]

Hi Adrian...
Happy Halloween Day...

This is a very good image, beautiful composition...
Simple, but is really interesting and nicely done.
Very good work! Great idea, well-seen and well-presented...
Tfs, George

  • Great 
  • mbrito Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1644 W: 118 N: 2834] (11418)
  • [2009-10-31 9:45]

Hello Adrian
Great presentation of this stone formation reminding a «dark monk». Excellent work with the few light, with great sharpness.
best regards, mb

Hi Adrian!
lovely shot! very nice presentation of Halloween's day...nice composition with interesting light and eye catchy shapes...
happy Halloween's;)
Alper

Hi Adrian,
Great focus and great sharpness on this shot. The lighting on the natural sculpture came out perfectly. I like that the rest of the photo is dark and almost black since it helps to concentrate on the subject.
TFS,
Niek

Hello Adrian,
c'est superbe cette stalagmite, une beauté du temps qui passe, félicitation pour l'idée.
Même pas peur!!!
Belle soirée.

Yolande

  • Great 
  • werdir Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 642 W: 40 N: 712] (3132)
  • [2009-10-31 12:35]

Hi Adrian,

A very interesting rock formation. With the lighting it does make a suitable capture for the Halloween holiday. Caves are such interesting places, and you've done a fine job with this.

TFS
Werner

Hello Adrian.
Magnificent formations in this cave! It looks like a fantasy world.Great details and colours with a nice compositon. Many thanks for sharing this underground beauty.Best regards Siegfried

Excellent photo Adrian, you have again used the available lighting to good effect. Detail is great and your notes are appreciated.

  • Great 
  • JT50 Gold Star Critiquer/Gold Note Writer [C: 210 W: 1 N: 173] (904)
  • [2009-10-31 14:59]

Hei Adrian,
God stemning i bildet,
nesten på kanten til litt spøkelseaktig.
Ha en god søndag.
Janak

Hi Adrian
Amazing cave very lovely shot and the
lighting is great the way you composed TFS
well done friend
Hazara

  • Great 
  • nicou Gold Star Critiquer/Gold Note Writer [C: 1363 W: 0 N: 2686] (21341)
  • [2009-11-01 1:44]

Hello,

fantatique imaee pour le thème, on aimerait bien voi ce qui il y a sous le voie, très bele idée et imagiantion, tu allie nature et horreur, superbe.

bravo et amitié

Nicou

Hello Adrian! Very interesting cave, good light and shadow, very good contrast and sharpness. Original work. Well done!

  • Great 
  • milas Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2743 W: 412 N: 2987] (32975)
  • [2009-11-01 8:02]

merhaba Adrian...
harika sarkıt ve dikitlerden oluşan bir mağara, güzel detaylar ve netlik, bu konuda Türkiye de bir kaç yer olduğunu iyi biliyorum, Burdur daki mağara çok güzel bir örnek..selamlar

Bonsoir Adrian.
Des images vraiment intéressantes prises dans ces grottes.
L’éclairage difficile est bien contrôlé est a donne un bon contraste.
Bonne soirée.
Urs

Hello Roges,
Excellent light and clarity...
Well planned composition and nice game of light with shade.
TFS
Selahattin E

Hi Adrian,

This is a wonderfull photo.
Great POV, nice details and tones. very well managed although the slow shutter speed.

Wonderfull work done on the Note's section as well.


Best Regards and TFS.

Have a great week,
Constantinos

Hi Adrian,

This is a very nice capture. Great play of light and shadows and a very pertinent title considering the ghost like stalactites.

Regards
Pascal-Eric

  • Great 
  • harpya Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5766 W: 198 N: 2587] (10150)
  • [2009-11-01 15:08]

Ciao Adrian


Beautiful composition within the
cave for this theme!
I loved the light and the effects on the stone.
Splendid composition, lovely color too.
Very well presentation.

Have a nice sunday,

Sergio

  • Great 
  • AKITA Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1059 W: 81 N: 66] (12677)
  • [2009-11-01 16:43]

dear Adrian,
a beautiful shot of the locked water fall rock, like a strange curtain, surely for Halloween.
this lighting shows us its wonder figure very well in the cave, and colors too.
thank you for your wonderful shot,
Akihisa

  • Great 
  • ayse51 Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1724 W: 127 N: 1483] (20890)
  • [2009-11-01 21:49]

Hi Adrian,
beautiful compo for the Hallowen days.Perfct light.Well done.TFS.Necla.

Hi Adrian,
What an amazing capture vith different composition.Great POV, sharpness and lighting.TFS.
Pozdrav,

hAyAti

Hi Adrian,
Happy halloween my dear friend...
Very interesting composition and good details,
Congratulations.tfs.
Dr.seyfettin Güner

  • Great 
  • chrisJ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 4269 W: 414 N: 6836] (42744)
  • [2009-11-02 7:40]

Hi Adrian

Looks a little like a ghostly apparition & as such, it's an apt upload for Halloween. Photographing dark cave interiors is difficult. I've not had much luck with the metering, so this is a pretty good result. Tfs!

Hi Adrian
good photo for Halloween
its little creepy
and its beautiful to.
have a nice week
Riste.

Hi Adrian
Excellent capture,nice colours and good contrast , nice job on the light,interesting note.
TFS
Regards
Andrzej

Ciao Roger, splendid light on fantastic cavern, superb composition, very well done, have a good week, ciao Silvio

Hi Adrian,
Beautiful picture of these caves,
excellent POV. and details,
nice colors and light,
very well done.
Michel

Superb capture here and suits the theme really well! The lighting and composition is amazing and lets the imagination run wild and spooky......

cheers,


Dilshan

Hello Adrian,

Been away for quite some time, so I can see a huge improvement in your photographic skills! My compliments!
This shot is indeed very nice. The warm light gives a strange feel to the composition. The low pov and detail of the rock in the background is outstandig!
Well done and thanks for sharing

Karen

Foto spettacolare e di grande effetto grafico. Ottima gestione della luce e taglio. Un lavoro eccellente.
complimenti,
Donato

ce frumusete, TFS!

Buena foto y magnifica iluminacion de esta cueva con esta impresionante estalactita con forma curiosa
Buen trabajo
un saludo
buen fin de semana

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