This map image could be re-created using vector graphics as an SVG file. This has several advantages; see  Commons:Media for cleanup for more information. If an SVG form of this image is available, please upload it and afterwards replace this template with {{ vector version available|new image name}}. It is recommended to name the SVG file “Glacial Lake Chicago (14,000 YBP) 7a.svg”—then the template Vector version available (or Vva) does not need the new image name parameter.

This map image was uploaded in the JPEG format even though it consists of non-photographic data. This information could be stored more efficiently or accurately in the PNG or SVG format. If possible, please upload a PNG or SVG version of this image without compression artifacts, derived from a non-JPEG source (or with existing artifacts removed). After doing so, please tag the JPEG version with {{Superseded|NewImage.ext}} and remove this tag. This tag should not be applied to photographs or scans. If this image is a diagram or other image suitable for vectorisation, please tag this image with {{Convert to SVG}} instead of {{BadJPEG}}. If not suitable for vectorisation, use {{Convert to PNG}}. For more information, see {{BadJPEG}}.

Summary

Licensing

This file is a work of a U.S. Army soldier or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States. العربية ∙ বাংলা ∙ català ∙ čeština ∙ Deutsch ∙ English ∙ español ∙ eesti ∙ فارسی ∙ suomi ∙ français ∙ hrvatski ∙ magyar ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ lietuvių ∙ македонски ∙ മലയാളം ∙ မြန်မာဘာသာ ∙ Nederlands ∙ polski ∙ português ∙ русский ∙ sicilianu ∙ српски / srpski ∙ Türkçe ∙ українська ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−

Original upload log

Upload date | User | Bytes | Dimensions | Comment

• 2009-12-09 21:43 (UTC) | Chris Light | 366169 (bytes) | 1528×1069 | {{Information |Description = Depiction the the Continental Glaciers filling the Great Lakes Basins, 14,000 YBP |Source = U.S. Army, Corp of Engineers |Date = ~~~~~ |Author = unknown |Permission = Public Domain |other

Information