File:Upper Terraces of Mammoth Hot Springs.jpg

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Summary

Description	English: Hot water is the creative force of the terraces. Even though Mammoth Hot Springs lie north of the caldera ring-fracture system, a fault trending north from Norris Geyser Basin, 21 miles (34 km) away, may connect Mammoth Hot Springs to the hot water of that system. A system of small fissures carries water upward to create approximately 50 hot springs in the Mammoth Hot Springs area. Another necessary ingredient for terrace growth is the mineral calcium carbonate. Thick layers of sedimentary limestone, deposited millions of years ago by vast seas, lie beneath the Mammoth area. As ground water seeps slowly downward and laterally, it comes in contact with hot gases charged with carbon dioxide rising from the magma chamber. Some carbon dioxide is readily dissolved in the hot water to form a weak carbonic acid solution. This hot, acidic solution dissolves great quantities of limestone as it works up through the rock layers to the surface hot springs. Once exposed to the open air, some of the carbon dioxide escapes from solution. As this happens, limestone can no longer remain in solution. A solid mineral reforms and is deposited as the travertine that forms the terraces. (The image caption was taken from here.) Français : Hautes terrasses de Mammoth Hot Springs (Litt. « Les sources chaudes taille mammouth ». Les terrasses (ou plutôt les gours) de Mammoth hot springs ont une origine géologique assez complexe: Le site de Mammoth hot springs ne se trouve pas dans la Caldeira de Yellowstone, mais sur un substrat sédimentaire Calcaire. De l'eau chaude provenant du bassin de Norris situé à 34 km de là circule vers cette zone via un système de failles orientées nord-sud. Cette eau est chargée en Acide carbonique, ce qui lui confère la propriété de dissoudre le calcaire. Lorsque l'eau chaude chargée en calcaire émerge, une partie de l'acide carbonique s'évapore sous forme de dioxyde de carbone, et une partie du calcaire précipite, formant de gigantesques gours.
Date
Source	Own work
Author	Brocken Inaglory

Camera location	44° 58′ 22.00″ N, 110° 42′ 17.00″ W	This and other images at their locations on: Google Maps - Google Earth - OpenStreetMap	( Info)44.972777777778;-110.70472222222

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Yellowstone National Park

Metadata

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Camera manufacturer	Canon
Camera model	Canon EOS DIGITAL REBEL XTi
Exposure time	1/800 sec (0.00125)
F-number	f/9
ISO speed rating	100
Date and time of data generation	15:17, 22 June 2008
Lens focal length	30 mm
Orientation	Normal
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Software used	Adobe Photoshop CS3 Windows
File change date and time	19:06, 4 April 2009
Y and C positioning	Co-sited
Exposure Program	Manual
Exif version	2.21
Date and time of digitizing	15:17, 22 June 2008
Meaning of each component	Y Cb Cr does not exist
Shutter speed	9.6438598632812
APEX aperture	6.33984375
Exposure bias	0
Metering mode	Pattern
Flash	Flash did not fire, compulsory flash suppression
Supported Flashpix version	0,100
Colour space	sRGB
Focal plane X resolution	4,433.2953249715
Focal plane Y resolution	4,453.6082474227
Focal plane resolution unit	inches
Custom image processing	Normal process
Exposure mode	Manual exposure
White balance	Auto white balance
Scene capture type	Standard
Supported Flashpix version	1
Image height	2,100 px
Image width	1,493 px
Date metadata was last modified	12:06, 4 April 2009
IIM version	2

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