File:Uvalde columns.jpg

Summary

Licensing

This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy. Bahasa Indonesia ∙ català ∙ čeština ∙ Deutsch ∙ eesti ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ Nederlands ∙ português ∙ polski ∙ sicilianu ∙ suomi ∙ Tiếng Việt ∙ Türkçe ∙ български ∙ македонски ∙ русский ∙ മലയാളം ∙ 한국어 ∙ 日本語 ∙ 中文 ∙ 中文（简体） ∙ 中文（繁體） ∙ العربية ∙ فارسی ∙ +/−

Original upload log

(All user names refer to en.wikipedia)

• 2006-12-22 03:07 Vsmith 307×230×8 (30576 bytes) Columnar jointing in melilite-olivine nephelinite from the Southern Balcones Volcanic Intrusive Rocks, Uvalde County, Texas. USGS image: http://esp.cr.usgs.gov/info/edwards/geochron.html