File:Snow rollers (30 January 2014) (Newark, Ohio, USA) 47 (46107483064).jpg
Original file (2,791 × 729 pixels, file size: 1.31 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionSnow rollers (30 January 2014) (Newark, Ohio, USA) 47 (46107483064).jpg |
(photo by Mary Ellen St. John) Snow rollers are very rare sedimentary structures. They only form in snowy sediments. Snow is a type of sediment of cold, meteoric origin and composed of the mineral ice (H2O). Snow rollers are layered cylindrical structures formed as moderately strong winds blow across snow surfaces. They are rare because several specific conditions must be met (e.g., see Reed, 1933; Cameron, 1949; Hornstein, 1951). Depressed trails occur behind snow rollers, showing the direction of movement. Trails start out small and narrow, but widen toward the actual snow roller. The widening trail reflects the growth of the snow roller - each end of the cylinder is conically embayed. The examples seen here formed in late January 2014 in Ohio. These are semi-natural, because the field in which they occur was clear-cut long ago. Almost all of Ohio's natural landscape was originally forested. Locality: field along the northern side of Sharon Valley Road, west of Country Club Drive intersection, western side of Newark, Licking County, east-central Ohio, USA References cited: Cameron (1949) - Snow rollers - nature at play. Weatherwise February, 1949: 12-13. Hornstein (1951) - Snow rollers. Weather 6(6); 168-169. Reed (1933) - Snow rollers. Monthly Weather Review December, 1932: 252. |
Date | |
Source | Snow rollers (30 January 2014) (Newark, Ohio, USA) 47 |
Author | James St. John |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/46107483064. It was reviewed on 28 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
28 November 2019
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 21:04, 28 November 2019 | 2,791 × 729 (1.31 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot SX40 HS |
Exposure time | 1/1,250 sec (0.0008) |
F-number | f/7.1 |
ISO speed rating | 100 |
Date and time of data generation | 01:55, 30 January 2014 |
Lens focal length | 30.376 mm |
Image title | |
Width | 2,816 px |
Height | 2,112 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 18:29, 21 January 2019 |
Y and C positioning | Co-sited |
Exif version | 2.3 |
Date and time of digitizing | 01:55, 30 January 2014 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 10.28125 |
APEX aperture | 5.65625 |
APEX exposure bias | 0 |
Maximum land aperture | 4.34375 APEX (f/4.51) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 11,540.983606557 |
Focal plane Y resolution | 11,540.983606557 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 4.3-150.5 mm |
Rating (out of 5) | 0 |
Date metadata was last modified | 13:29, 21 January 2019 |
Unique ID of original document | 9E4EF5CA3DF3AE182DE06426B3ADF14C |
IIM version | 1 |