File:Oval Spring (16 August 2014) 6.jpg
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Summary
[edit]DescriptionOval Spring (16 August 2014) 6.jpg |
English: Oval Spring is a geyser in the Sawmill Group of Yellowstone's Upper Geyser Basin. It is located about 40 meters north-northeast of Sawmill Geyser and 13 meters north-northwest of Penta Geyser. The circular basin is about 9 meters in diameter. A centrally-located, irregularly elongated vent is oriented northeast-southwest and is about 1 by 2 meters in size. Much of the basin is floored by geyserite, which varies in surface morphology from nodulose to smooth-but-slightly-undulating to terracetted. Shallow, irregularly dendritic channels are present in the geyserite floor that drain water toward the central vent.
Water levels in Oval Spring vary depending on the nature of eruptive activity in other Sawmill Group geysers. Observed conditions include: low to very low water levels (but still visible), moderately high water levels, and a water-filled basin with slight overflow. Observed behaviors range from calm pools to pulsing/undulating to splashing eruptions (see pictures elsewhere in this photo album). In early 2017, nearby Sawmill Geyser, which normally erupts frequently, ceased activity - it has been dormant ever since. Changes also occurred in all other Sawmill Group features. The dominant behavior in the group involves frequent eruptive play from Sawmill Geyser, Tardy Geyser, and Spasmodic Geyser. During some past seasons, Penta Geyser and Churn Geyser have dominated the group's activity. Since the Sawmill dormancy started, Spasmodic has been the most active member of the group - it continues to have frequent eruptions. Oval Spring has also been affected. From 2013 to 2016, eruptions at Oval Spring were often reported. The last reported eruption was in early fall 2016. The above photo shows Oval Spring's condition in summer 2017 - no eruptions, calm water having a greenish-blue color and sitting at a moderate level, plus some yellowish bacterial mats growing on parts of the geyserite basin floor. The color changes indicate the feature has cooled (see thermal photos from 2016 in this album when Oval Spring was still hot). See video of Oval Spring: www.youtube.com/watch?v=8qjkDaRJxIg |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/15332618287/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15332618287. It was reviewed on 19 December 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
19 December 2022
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current | 17:24, 19 December 2022 | 4,288 × 2,848 (3.13 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15332618287/ with UploadWizard |
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Metadata
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D90 |
Exposure time | 1/640 sec (0.0015625) |
F-number | f/6.3 |
ISO speed rating | 200 |
Date and time of data generation | 14:14, 16 August 2014 |
Lens focal length | 200 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 16:44, 12 October 2014 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 14:14, 16 August 2014 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, auto mode |
DateTime subseconds | 00 |
DateTimeOriginal subseconds | 00 |
DateTimeDigitized subseconds | 00 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 300 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
GPS tag version | 2.2.0.0 |
Supported Flashpix version | 1 |
Image width | 4,288 px |
Image height | 2,848 px |
Date metadata was last modified | 12:44, 12 October 2014 |