This is a file from the Wikimedia Commons

File:Snow roller (30 January 2014) (Newark, Ohio, USA) 53 (46107487244).jpg

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Original file(2,019 × 1,293 pixels, file size: 1.52 MB, MIME type: image/jpeg)

Summary

Description

(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 example seen here formed in late January 2014 in Ohio. This is semi-natural, because the field in which it occurs 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 roller (30 January 2014) (Newark, Ohio, USA) 53
Author James St. John

Licensing

w:en:Creative Commons
attribution
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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.

Checked copyright icon.svg This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/46107487244. It was reviewed on by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

30 January 2014

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current21:04, 28 November 2019Thumbnail for version as of 21:04, 28 November 20192,019 × 1,293 (1.52 MB)Ser Amantio di NicolaoTransferred from Flickr via #flickr2commons
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Metadata